JP2017110487A - Reinforcing structure and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reinforce an intermediate layer portion of an existing building easily and at low cost. A reinforcing structure for reinforcing an existing building includes a reinforcing column portion, a reinforcing beam portion 22, a reinforcing intersection portion, and a connecting member 24. Reinforcing columns include hardened concrete that is placed along the columns of an existing building and has rebar embedded in it. The reinforcing beam portion 22 is arranged along the beam portion 12 and includes a hardened concrete body in which reinforcing bars are embedded. The reinforcing intersection is arranged at a position corresponding to the intersection, is connected to the end of the reinforcing column portion and the end of the reinforcing beam portion 22, respectively, and includes a cured polymer cement mortar in which reinforcing bars are embedded. The connecting member 24 is inserted into both of the beam portion 12 and the reinforcing beam portion 22. One end portion 24b of the connecting member 24 is connected to the reinforcing bar R1 in the beam portion 12. [Selection diagram] Fig. 3

Description

  The present disclosure relates to a reinforcing structure and a manufacturing method thereof.

  In recent years, various construction methods have been proposed in order to improve the earthquake resistance of existing buildings. Non-Patent Document 1 discloses a method for manufacturing a reinforcing structure that simply and inexpensively reinforces an existing building. The method includes a step of arranging a reinforcing bar at a position corresponding to a column part, a beam part, and an intersection part on the outer wall surface side of an existing building, and a first formwork configured in a part corresponding to the column part of the reinforcing bar A step of placing concrete in the inside and a second formwork formed in a part of the reinforcing bar corresponding to the beam part, and a third formwork configured in the part of the reinforcing bar to be an intersection Filling the inside with polymer cement mortar. The compressive strength of the mortar hardened body in which the polymer cement mortar is hardened is larger than the compressive strength of the hardened concrete body in which the concrete is hardened.

"Summary Report on Building Technology Performance Certification Evaluation Design U Frame Method-Seismic Strengthening Method Using External RC Frame-", Japan Building Research Institute, GBRC Performance Certification No. 13-27

  By the way, depending on the structure of existing buildings such as medium- and high-rise buildings (10th to 15th floors) such as steel-framed reinforced concrete (SRC), the earthquake resistance of the middle layer (for example, the vicinity of the 6th floor) switched to reinforced concrete (RC). Compared with performance, sufficient seismic performance may be secured in the lower layer of SRC construction. When reinforcing such an existing building and constructing a reinforcing structure from the first floor portion of the existing building, the lower layer portion having sufficient strength is also reinforced before the intermediate layer portion is reinforced. Therefore, the construction of a reinforcing structure for the lower layer can be a factor in increasing costs and prolonging the construction period.

  In view of this, the present disclosure describes a reinforcing structure capable of easily and inexpensively reinforcing an intermediate layer portion of an existing building and a method for manufacturing the same.

  A reinforcing structure according to one aspect of the present disclosure includes a column including a reinforcing bar inside, a beam including the reinforcing bar inside, a column and the end of the column, A reinforcing structure that reinforces an existing building including an intersection connected to each end of a beam part, the reinforcing column part including a hardened concrete body that is disposed along the column part and in which a reinforcing bar is embedded, Reinforced beam part including hardened concrete with reinforcing bars embedded along the beam part, and arranged at a position corresponding to the intersection, and connected to the end of the reinforcing column part and the end of the reinforcing beam part, respectively. A reinforcing intersection including a hardened polymer cement mortar in which reinforcing bars are embedded, and a connecting member. The connecting member is inserted into both of the column portion and the reinforcing column portion, and one end portion is in the column portion. It is connected to the reinforcing bar, or the beam part and the reinforcing beam part These and end is inserted inside both are connected to the reinforcing bar in the beam portion over.

  In the reinforcing structure according to one aspect of the present disclosure, the connection member is inserted into both the column portion and the reinforcement column portion, and one end portion of the connection member is connected to the reinforcing bar in the column portion. Alternatively, in the reinforcing structure according to one aspect of the present disclosure, the connecting member is inserted into both the beam portion and the reinforcing beam portion, and one end portion of the connecting member is connected to the reinforcing bar in the beam portion. Therefore, since the connecting member is firmly attached to the column portion or the beam portion, when connecting the column portion and the reinforcement column portion using the construction anchor after fixing to the concrete, or the beam portion and the reinforcement beam portion. Compared to the case of connection, the weight of the reinforcing structure is transmitted to the column part or the beam part very reliably through the connection member. Therefore, since the reinforcement structure is supported with respect to the existing building, the reinforcement is performed on the middle layer portion of the existing building where reinforcement is required without constructing the reinforcement structure on the lower layer portion of the existing building. be able to. As a result, it is possible to easily and inexpensively reinforce the intermediate layer portion of the existing building.

  The connecting member is a reinforcing bar inserted into both of the beam part and the reinforcing beam part, and one end part of the connecting member is bent in a hook shape and connected in a state of being hooked on the reinforcing bar in the beam part. The other end side of the connection member may extend in a direction orthogonal to the surface of the beam portion. In this case, it is possible to connect the connecting member and the reinforcing bar in the beam part very simply by simply hooking one end of the connecting member on the reinforcing bar in the beam part.

  The other end of the connection member may be bent into a predetermined shape. In this case, it is possible to shorten the fixing length in the reinforcing beam portion on the other end portion side of the connecting member as compared with the case where the other end portion of the connecting member is linear.

  One end of the connection member may be welded to the reinforcing bar in the column part, or may be welded to the reinforcing bar in the beam part. In this case, the connection member and the reinforcing bar can be reliably connected.

この場合、接続鉄筋と補強梁部との定着性を十分に高めることが可能となる。 Fixing the length La of the portion of the reinforcing beam portion of the connecting member, the parameters S, f _{t, d b,} the F _c respectively S: a correction factor must fixing the length of the connecting member, the other end of the connecting member 1.25 in the case of a straight line, 0.70 in the case where the other end of the connecting member has a bent portion bent into a predetermined shape.
f _t : Short-term allowable tensile stress degree of connecting member d _b : Numerical value of diameter by name of connecting member F _c : Formula 1 may be satisfied when defined as the design standard strength of concrete.

In this case, it is possible to sufficiently improve the fixing property between the connecting reinforcing bars and the reinforcing beam portion.

  The connecting member is a reinforcing bar inserted into both of the column part and the reinforcing column part, and one end part of the connecting member is bent in a hook shape and connected in a state of being hooked on the reinforcing bar in the column part. The other end side of the connecting member may be suspended in the reinforcing column. In this case, it is possible to connect the connecting member and the reinforcing bar in the column part very simply by simply hooking the hook part on the reinforcing bar in the column part.

  The reinforcing bar in the column has a column main reinforcement extending along the extending direction of the column, and the reinforcing bar in the reinforcing column has a reinforcing column main reinforcing bar extending in the extension direction of the reinforcing column. The member is a reinforcing bar inserted into both of the column part and the reinforcing column part, and the connecting member is connected to the column main reinforcement by a lap joint and embedded in the column part, and the reinforcing column part You may include the connection part which connects the upper end part of a main reinforcement, and a joint part. In this case, the connection between the connection member and the reinforcing column main bar can be performed very simply by simply lap-joining the connection member and the reinforcing column main bar.

  The reinforcing structure according to another aspect of the present disclosure further includes an auxiliary column portion provided on the upper end side of the reinforcing column portion and burying the connecting portion, and the auxiliary column portion is in a first direction orthogonal to the surface of the column portion. You may have a part which becomes small as the thickness in goes upwards. In this case, since the force concentrates on the auxiliary pillar portion and it becomes difficult to act, the strength of the reinforcing structure can be increased. In addition, since the auxiliary pillar part in which the connecting part is embedded has a constant thickness in the vertical direction, less material is required to construct the auxiliary pillar part, so the reinforcement structure can be constructed at low cost. It becomes possible to do.

  The gradient defined by the height of the auxiliary column part in the first direction relative to the length of the auxiliary column part in the vertical direction may be 1/3 or less. In this case, since the force is less likely to concentrate on the auxiliary column part, the strength of the reinforcing structure can be further increased.

  The connecting member may be a wire rope disposed inside both the column portion and the reinforcement column portion in a state of being hooked on the reinforcing bar of the column portion and suspended in the reinforcement column portion. In this case, it is possible to connect the connecting member and the reinforcing bar in the column part very simply by simply hooking the wire rope on the reinforcing bar in the column part.

  A reinforcing structure according to another aspect of the present disclosure includes a column portion including a reinforcing bar inside, a beam portion including a reinforcing bar inside, a column portion and a portion where the beam portion intersects and an end portion of the column portion, and A reinforcing structure that reinforces an existing building including an intersection connected to each end of a beam part, the reinforcing column part including a hardened concrete body that is disposed along the column part and in which a reinforcing bar is embedded, Reinforced beam part including hardened concrete with reinforcing bars embedded along the beam part, and arranged at a position corresponding to the intersection, and connected to the end of the reinforcing column part and the end of the reinforcing beam part, respectively. A reinforcing intersection including a cured polymer cement mortar in which reinforcing bars are embedded, and a connecting member, and the connecting member is inserted through both the column and the reinforcing column so as to penetrate the column. Or reinforced with the beam to penetrate the beam It is inserted into the interior of both over and parts.

  In the reinforcing structure according to another aspect of the present disclosure, the connection member is inserted into both of the column part and the reinforcement column part so as to penetrate the column part, or so as to penetrate the beam part. The beam portion and the reinforcing beam portion are inserted into both of them. Therefore, since the connecting member is firmly attached to the column portion or the beam portion, when connecting the column portion and the reinforcement column portion using the construction anchor after fixing to the concrete, or the beam portion and the reinforcement beam portion. Compared to the case of connection, the weight of the reinforcing structure is transmitted to the column part or the beam part very reliably through the connection member. Therefore, since the reinforcement structure is supported with respect to the existing building, the reinforcement is performed on the middle layer portion of the existing building where reinforcement is required without constructing the reinforcement structure on the lower layer portion of the existing building. be able to. As a result, it is possible to easily and inexpensively reinforce the intermediate layer portion of the existing building.

  A reinforcing structure according to another aspect of the present disclosure includes a column part including a reinforcing bar and a steel frame therein, a beam part including the reinforcing bar and the steel frame therein, and a column part that is located at a position where the column part and the beam part intersect each other. A reinforcing structure that reinforces an existing building that includes an end portion of each and an intersection portion connected to each end portion of a beam portion, including a hardened concrete body that is disposed along a pillar portion and in which a reinforcing bar is embedded Reinforced beam part including a hardened concrete body that is disposed along the column part and the beam part and in which the reinforcing bars are embedded, and an end part of the reinforcing column part and an end part of the reinforcing beam part that are arranged at positions corresponding to the intersections Each of which is connected to each other and includes a reinforcing cross section including a hardened polymer cement mortar body in which a reinforcing bar is embedded, and a connecting member, and the connecting member is inserted into both of the column part and the reinforcing column part, and has one end part. Is connected to the steel frame in the column, or Parts and and one end is inserted into the interior of both over a reinforcing beam portion is connected to the steel in the beam portion.

  In the reinforcing structure according to another aspect of the present disclosure, the connection member is inserted into both the column portion and the reinforcement column portion, and one end portion of the connection member is connected to the steel frame in the column portion. Alternatively, in the reinforcement structure according to another aspect of the present disclosure, the connection member is inserted into both the beam portion and the reinforcement beam portion, and one end portion of the connection member is connected to the steel frame in the beam portion. Therefore, since the connecting member is firmly attached to the column portion or the beam portion, when connecting the column portion and the reinforcement column portion using the construction anchor after fixing to the concrete, or the beam portion and the reinforcement beam portion. Compared to the case of connection, the weight of the reinforcing structure is transmitted to the column part or the beam part very reliably through the connection member. Therefore, since the reinforcement structure is supported with respect to the existing building, the reinforcement is performed on the middle layer portion of the existing building where reinforcement is required without constructing the reinforcement structure on the lower layer portion of the existing building. be able to. As a result, it is possible to easily and inexpensively reinforce the intermediate layer portion of the existing building.

  The connecting member is a reinforcing bar that is inserted into both of the beam portion and the reinforcing beam portion, and one end portion is connected to the steel frame in the column portion, and the other end portion of the connecting member is bent into a predetermined shape. Good. In this case, it is possible to shorten the fixing length in the reinforcing beam portion on the other end portion side of the connecting member as compared with the case where the other end portion of the connecting member is linear.

この場合、接続鉄筋と補強梁部との定着性を十分に高めることが可能となる。 The connecting member is a reinforcing bar that is inserted into both of the beam portion and the reinforcing beam portion and has one end connected to the steel frame in the column portion. The fixing length La of the portion of the connecting member in the reinforcing beam portion is La is, S parameter S, f _{t, d b,} the F _c respectively: a necessary correction coefficient of the fixing length of the connecting member, when the other end of the connecting member is straight 1.25, connecting members 0.70 when the other end has a bent portion bent into a predetermined shape
f _t : Short-term allowable tensile stress of the connecting member d _b : Numerical value of the diameter by the name of the connecting member F _c : Formula 2 may be satisfied when defined as the design standard strength of concrete.

In this case, it is possible to sufficiently improve the fixing property between the connecting reinforcing bars and the reinforcing beam portion.

  The column support jig further includes a column support jig that supports the reinforcement column part on the lower end side of the reinforcement column part, and the column support jig is attached to the column part via a fastener having one end connected to a steel frame in the column part. Also good. In this case, the weight of the reinforcing column portion (reinforcing structure) supported by the column receiving jig is transmitted to the column portion very reliably via the column receiving jig and the fastener.

  The reinforcing structure according to another aspect of the present disclosure further includes an auxiliary beam portion extending substantially parallel to the reinforcing beam portion, and the existing building includes a lower layer portion and an upper layer portion set back on the inner side of the lower layer portion. The reinforcing column part, the reinforcing beam part, and the reinforcing intersection part are provided in the upper layer part, the auxiliary beam part is disposed on the roof slab of the lower layer part, and the height in the vertical direction is the beam part. A flat shape smaller than the thickness in the direction orthogonal to the surface of the surface may be exhibited. In this case, since the height of the auxiliary beam portion in the vertical direction is relatively low, it is easy for a person or the like to enter or exit the roof slab of the lower layer portion.

  A method for manufacturing a reinforced structure according to another aspect of the present disclosure includes a column part, a beam part including a reinforcing bar inside, a position where the column part and the beam part intersect, and an end part and a beam part of the column part. A method of manufacturing a reinforcing structure that reinforces an existing building that includes an intersection connected to each end of the beam, and includes a first step of turning a part of the beam so that the reinforcing bar of the beam is exposed And a second step of connecting one end of the connecting reinforcing bar to the reinforcing bar of the beam portion exposed in the first step, and a third step of arranging the reinforcing bars at positions corresponding to the column portion, the beam portion, and the intersecting portion, respectively. After the third step, a fourth step of providing a first mold so as to cover the reinforcing bars arranged in the column part, and placing concrete in the first mold, and a third step Later, a second formwork is provided so as to cover the reinforcing bars and connecting reinforcing bars arranged in the beam part, and the part of the beam part beaten in the first process is filled. However, after the fifth step of placing concrete in the second formwork and the third step, the third formwork is provided so as to cover the reinforcing bars arranged at the intersection, and the third formwork And a sixth step of filling the inside with polymer cement mortar.

  In the method for manufacturing a reinforced structure according to another aspect of the present disclosure, a part of the beam portion is wound so that the reinforcing bar of the beam portion is exposed, and one end of the connection reinforcing bar is connected to the reinforcing bar of the beam portion that is exposed by being beaten. doing. Furthermore, a second mold is provided so as to cover the reinforcing bars and the connecting reinforcing bars arranged in the beam portion, and concrete is placed in the second mold frame while filling the beaten beam portion. For this reason, the connecting reinforcing bars are inserted through both the beam portion and the reinforcing beam portion. Therefore, since the connecting rebar is firmly attached to the column part or the beam part, compared to the case where the beam part and the reinforcing beam part are connected using a post-construction anchor fixed to the concrete, the reinforcing structure The weight is transmitted very reliably to the beam part via the connecting rebar. As a result, since the reinforced structure is supported with respect to the existing building, the reinforcement is not performed on the lower layer part of the existing building, but the intermediate layer part of the existing building requiring reinforcement is reinforced. It can be carried out. As described above, it is possible to easily and inexpensively reinforce the intermediate layer portion of the existing building. Moreover, in the manufacturing method of the reinforcement structure which concerns on the other viewpoint of this indication, when placing concrete in a 2nd formwork, the part of the beam part into which concrete was beaten is also filled. Therefore, the step of filling the beaten beam portion with the filler becomes unnecessary. Therefore, it becomes possible to easily manufacture the reinforcing structure.

  A method for manufacturing a reinforced structure according to another aspect of the present disclosure includes a column part, a beam part including a reinforcing bar inside, a position where the column part and the beam part intersect, and an end part and a beam part of the column part. A method of manufacturing a reinforcing structure that reinforces an existing building that includes an intersection connected to each end of the beam, and includes a first step of turning a part of the beam so that the reinforcing bar of the beam is exposed And a second step of connecting one end of the connecting reinforcing bar to the reinforcing bar of the beam portion exposed in the first step, and a third step of filling the filler portion in the beam portion beaten in the first step. , A fourth step of arranging the reinforcing bars at positions corresponding to the column part, the beam part and the crossing part, and after the fourth process, a first mold is provided so as to cover the reinforcing bars arranged in the pillar part After the fifth step of placing concrete in the first formwork and the fourth step, the reinforcing bars arranged in the beam and the connecting reinforcing bars are covered. The third mold is provided so as to cover the reinforcing bars arranged at the intersection after the fourth process and the sixth process in which the second mold is provided and concrete is placed in the second mold. And a seventh step of providing a frame and filling a polymer cement mortar into the third mold.

  In the method for manufacturing a reinforced structure according to another aspect of the present disclosure, a part of the beam portion is wound so that the reinforcing bar of the beam portion is exposed, and one end of the connection reinforcing bar is connected to the reinforcing bar of the beam portion that is exposed by being beaten. doing. Further, a second mold is provided so as to cover the reinforcing bars and the connecting reinforcing bars arranged in the beam portion, and concrete is placed in the second mold. For this reason, the connecting reinforcing bars are inserted through both the beam portion and the reinforcing beam portion. Therefore, since the connecting rebar is firmly attached to the column part or the beam part, compared to the case where the beam part and the reinforcing beam part are connected using a post-construction anchor fixed to the concrete, the reinforcing structure The weight is transmitted very reliably to the beam part via the connecting rebar. As a result, since the reinforced structure is supported with respect to the existing building, the reinforcement is not performed on the lower layer part of the existing building, but the intermediate layer part of the existing building requiring reinforcement is reinforced. It can be carried out. As described above, it is possible to easily and inexpensively reinforce the intermediate layer portion of the existing building. Moreover, in the manufacturing method of the reinforcement structure which concerns on the other viewpoint of this indication, before placing concrete in a 2nd formwork, the part of the beaten beam part is filled with the filler. For this reason, infiltration of water or the like into the beaten beam portion is suppressed, and the reinforcing bars and the like of the existing building are hardly corroded. Accordingly, it is possible to increase the long-term strength of a reinforced building in which a reinforced structure is constructed in an existing building.

  According to the reinforcing structure and the manufacturing method thereof according to the present disclosure, it is possible to easily and inexpensively reinforce the intermediate layer portion of the existing building.

FIG. 1 is a perspective view showing an example (first example) of a reinforced building in which a reinforced structure is constructed in an existing building. FIG. 2 is a perspective view schematically showing a part of FIG. 3 is a cross-sectional view taken along line II-II in FIG. FIG. 4 is a diagram for explaining the relationship between the type and number of connecting reinforcing bars. FIG. 5 is a perspective view showing another example (second example) of a reinforced building in which a reinforced structure is constructed in an existing building. FIG. 6 is a perspective view schematically showing the internal structure of FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. FIG. 8 is a cross-sectional view showing another example (third example) of a reinforced building in which a reinforced structure is constructed in an existing building. FIG. 9 is a cross-sectional view showing another example (fourth example) of a reinforced building in which a reinforced structure is constructed in an existing building. FIG. 10 is a cross-sectional view showing another example (fifth example) of a reinforced building in which a reinforced structure is constructed in an existing building. FIG. 11 is a cross-sectional view showing another example (sixth example) of a reinforced building in which a reinforced structure is constructed in an existing building. FIG. 12 is a cross-sectional view showing another example (seventh example) of a reinforced building in which a reinforced structure is constructed in an existing building. FIG. 13: is sectional drawing which shows the other example (8th example) of the reinforced building by which the reinforcement structure was constructed in the existing building. FIG. 14 is a perspective view showing another example (a ninth example) of a reinforced building in which a reinforced structure is constructed in an existing building. 15 is a cross-sectional view taken along line XV-XV in FIG. FIG. 16 is a cross-sectional view showing another example (tenth example) of a reinforced building in which a reinforced structure is constructed in an existing building. FIG. 17 is a cross-sectional view illustrating another example (an eleventh example) of a reinforced building in which a reinforced structure is applied to an existing building. FIG. 18 is a perspective view showing another example (a twelfth example) of a reinforced building in which a reinforced structure is constructed in an existing building. 19 is a cross-sectional view taken along line XIX-XIX in FIG.

  Since the embodiment according to the present disclosure described below is an example for explaining the present invention, the present invention should not be limited to the following contents. In the following description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

[1] 1st Embodiment With reference to FIGS. 1-3, the structure of 1 A of reinforced buildings which concern on 1st Embodiment is demonstrated. The reinforced building 1 </ b> A is obtained by constructing a reinforcing structure 20 on an existing building 10. The existing building 10 includes a column part 11, a beam part 12, an intersection part 13, an outer wall 14, a window 15, and a slab part (not shown). The column part 11, the beam part 12, the intersection part 13, and the slab part are comprised, for example by reinforced concrete.

  The column portion 11 is provided on a base portion (not shown) and extends along the vertical direction. The beam part 12 is arrange | positioned between the adjacent pillar parts 11, and extends along a horizontal direction. Therefore, the assembly in which the column part 11 and the beam part 12 are assembled has a lattice shape. The column portion 11 and the beam portion 12 have, for example, a rectangular column shape having a rectangular cross section. The thickness (depth) of the column part 11 may be about 400 mm to 1000 mm. The width of the column part 11 may be about 400 mm to 1000 mm. The thickness (depth) of the beam portion 12 may be, for example, about 200 mm to 500 mm. The width of the beam portion 12 may be about 500 mm to 1200 mm.

  The intersection part 13 is a part located in the location where the pillar part 11 and the beam part 12 cross | intersect. The intersecting portion 13 also functions as a part of the column portion 11. The outer wall 14 extends along the vertical plane between the column part 11 and the beam part 12. The window 15 is provided in a region surrounded by the pillar portion 11 and the beam portion 12 in the outer wall 14.

  The slab part extends along the horizontal plane between the column part 11 and the beam part 12. The slab part functions as a floor and a ceiling. In addition, the existing building 10 illustrated by FIG. 1 is a 9-story building.

  The reinforcing structure 20 is provided on the outer wall surface of the existing building 10. As shown in FIGS. 1 and 2, the reinforcing structure 20 includes a reinforcing column part 21, a reinforcing beam part 22, a reinforcing intersection part 23, and a connection member 24. The reinforcing column part 21, the reinforcing beam part 22, and the reinforcing intersection part 23 have, for example, a rectangular column shape having a rectangular cross section.

  The reinforcing column part 21 is arranged on the outer wall surface of the existing building 10 and at a position corresponding to the column part 11. The reinforcing column part 21 extends along the same direction as the extending direction of the column part 11. That is, the reinforcing pillar portion 21 extends along the vertical direction from the first floor to the ninth floor of the existing building 10. The thickness (depth) of the reinforcing column part 21 may be, for example, about 350 mm to 600 mm. The width of the reinforcing column portion 21 may be about 500 mm to 800 mm.

  The reinforcing beam portion 22 is disposed on the outer wall surface of the existing building 10 and at a position corresponding to the beam portion 12. The reinforcing beam portion 22 extends along the same direction as the extending direction of the beam portion 12. That is, the reinforcing beam portion 22 extends along the horizontal direction. The reinforcing beam portion 22 is located between the reinforcing column portions 21 adjacent in the horizontal direction. The thickness (depth) of the reinforcing beam portion 22 may be, for example, about 350 mm to 600 mm. The beam formation (height) of the reinforcing beam portion 22 may be about 500 mm to 900 mm.

  The reinforcing intersection 23 is disposed on the outer wall surface of the existing building 10 and at a position corresponding to the intersection 13. The reinforcing intersection 23 connects the ends of the reinforcing column 21 and the reinforcing beam 22. Therefore, the reinforcing intersection 23 is located at the intersection between the reinforcing column 21 and the reinforcing beam 22. Therefore, the reinforcing structure 20 is configured in a lattice shape by the reinforcing column part 21, the reinforcing beam part 22, and the reinforcing intersection part 23. The thickness (depth) of the reinforcing intersection 23 may be, for example, about the same as the thickness of the reinforcing beam 22 or 600 mm or less.

The reinforcing column portion 21 and the reinforcing beam portion 22 are made of, for example, reinforced concrete (a hardened concrete body in which the reinforcing bars are embedded). The reinforcing intersection 23 is made of, for example, a mortar hardened body in which reinforcing bars are embedded. The cured mortar is formed by curing polymer cement mortar. In this embodiment, the compressive strength of a mortar hardened body is larger than the compressive strength of a hardened concrete body when compared with the age of the same day. The compressive strength at the age of 28 days of the cured mortar is preferably 65 N / mm ² or more.

<Polymer cement mortar>
Here, the polymer cement mortar will be described. Polymer cement mortar is a mixture of a polymer cement composition and water.

(I) Polymer cement composition The polymer cement composition is a polymer cement composition for a reinforcing method, and includes cement, fine aggregate, fluidizer, re-emulsifying powder resin, inorganic expansion material, and synthetic resin. Contains fiber.

  Cement is a common hydraulic material, and any commercially available product can be used. Among them, it is preferable to include Portland cement as defined in JIS R 5210: 2009 “Portland cement”. From the viewpoint of fluidity and quick setting, it is more preferable to include early-strength Portland cement.

From the viewpoint of strength development, the Blaine specific surface area of cement is
Preferably 3000cm ² / g~6000cm ² / g,
More preferably, it is 4000 cm < ² > / g-5000 cm < ² > / g,
More preferably, it is 4200 cm < ² > / g-4800 cm < ² > / g.

  Examples of the fine aggregate include sand such as quartz sand, river sand, land sand, sea sand, and crushed sand. As the fine aggregate, one kind selected from these may be used alone, or two or more kinds may be used in combination. Among these, it is preferable to contain silica sand from the viewpoint of further smoothing the filling property of the polymer cement mortar into the mold.

  When a fine aggregate is screened by the method specified in JIS A 1102: 2014 “Aggregate Screening Test Method”, the mass fraction (%) remaining between each continuous screen is 0 at a sieve opening of 2000 μm. It is preferable that it is mass%. When all fine aggregates pass through a sieve having a sieve opening of 2000 μm, the mass fraction is 0% by mass.

The mass fraction (%) that remains between each successive sieve is
In 1180 micrometers of sieve openings, it is 5.0-25.0,
In a sieve opening of 600 μm, it is 20.0 to 50.0,
In a sieve opening of 300 μm, it is 20.0 to 50.0,
In a sieve opening of 150 μm, it is 5.0 to 25.0,
It is preferable that it is 0-10.0 in 75 micrometers of sieve openings.

The mass fraction (%) that remains between each successive sieve is
In a sieve opening of 1180 μm, it is 10.0 to 20.0,
In a sieve opening of 600 μm, it is 25.0 to 45.0,
In a sieve opening of 300 μm, it is 25.0 to 45.0,
In a sieve opening of 150 μm, it is 10.0 to 20.0,
It is more preferably 0 to 5.0 at a sieve opening of 75 μm.

  When the fine aggregate is screened according to the above rules, the mortar having better material separation resistance and fluidity is obtained because the mass fraction (%) staying between each successive screen is within the above range. A cured product having higher compressive strength can be obtained.

When the fine aggregate is screened by the method defined in JIS A 1102: 2014 “Aggregate Screening Test Method”, the coarse particle ratio of the fine aggregate is preferably 1.60 to 3.00,
More preferably, it is 1.90-2.80,
More preferably, it is 2.10-2.70,
Especially preferably, it is 2.30-2.60.

  When the coarse particle ratio of the fine aggregate is in the above range, a polymer cement mortar having better material separation resistance and fluidity and a cured body having better strength characteristics can be obtained.

  The above sieving can be performed using several sieves having different openings as defined in JIS Z 8801-1: 2006 “Test sieve—Part 1: Metal mesh sieve”.

The content of fine aggregate is 100 parts by mass of cement,
Preferably it is 80-130 parts by mass,
More preferably, it is 85 parts by mass to 125 parts by mass,
More preferably, it is 90 mass parts-120 mass parts,
Particularly preferably, it is 95 to 115 parts by mass,
Most preferably, it is 100 mass parts-110 mass parts.

  By setting the content of the fine aggregate within the above range, a cured body having higher compressive strength can be obtained.

  Examples of the fluidizing agent include formaldehyde condensates of melamine sulfonic acid, casein, calcium caseinate, and polycarboxylic acids. The fluidizing agent may be used alone or in combination of two or more selected from these. Among these, from the viewpoint of obtaining a high water reducing effect, it is preferable to include a polycarboxylic acid-based fluidizing agent. By using a polycarboxylic acid-based fluidizing agent, the water powder ratio can be reduced, and the strength development of the mortar cured body can be further improved.

The content of the fluidizing agent is 100 parts by mass of cement,
Preferably, it is 0.04 parts by mass to 0.55 parts by mass,
More preferably, it is 0.10 parts by mass to 0.45 parts by mass,
More preferably, it is 0.15 mass part-0.35 mass part,
Most preferably, it is 0.20 mass part-0.30 mass part.

  By setting the content of the fluidizing agent in the above range, a polymer cement mortar having better fluidity can be obtained. Moreover, the mortar hardening body which has much higher compressive strength can be obtained.

  The type and production method of the re-emulsified powder resin are not particularly limited, and those produced by a known production method may be used. The re-emulsified powder resin may have an anti-blocking agent on the surface. From the viewpoint of durability of the cured mortar, the re-emulsified powder resin preferably contains acrylic. Furthermore, from the viewpoint of adhesiveness and compressive strength, the glass transition temperature (Tg) of the re-emulsified powder resin is preferably in the range of −5 ° C. to 20 ° C.

The content of the re-emulsified powder resin is 100 parts by mass of cement,
Preferably 0.2 parts by mass to 6.0 parts by mass,
More preferably, it is 0.5 to 3.5 parts by mass,
More preferably, it is 0.7 mass part-2.8 mass parts,
Particularly preferably, it is 0.9 parts by mass to 2.1 parts by mass,
Most preferably, it is 1.1 mass part-1.8 mass parts.

  By setting the content of the re-emulsifying powder resin in the above range, the adhesiveness of the polymer cement mortar and the compressive strength of the mortar hardened body can be achieved at a higher level.

  Examples of the inorganic expansion material include quick lime-gypsum expansion material, gypsum expansion material, calcium sulfoaluminate expansion material, and quick lime-gypsum-calcium sulfoaluminate expansion material. As the inorganic expansion material, one kind selected from these may be used alone, or two or more kinds may be used in combination. Among these, from the viewpoint of further improving the compressive strength of the cured body, it is preferable to include quick lime-gypsum-calcium sulfoaluminate-based expansion material.

The content of the inorganic expansion material is 100 parts by mass of cement,
Preferably it is 2.0 parts by mass to 10.0 parts by mass,
More preferably, it is 3.0 parts by mass to 9.0 parts by mass,
More preferably, it is 4.0 mass parts-8.0 mass parts,
Most preferably, it is 5.0 mass parts-7.0 mass parts.

  By setting the content of the inorganic expansive material in the above range, more appropriate expansibility can be exhibited and shrinkage of the mortar hardened body can be suppressed.

  Examples of the synthetic resin fiber include polyethylene, ethylene / vinyl acetate copolymer (EVA), polyolefin such as polypropylene, polyester, polyamide, polyvinyl alcohol, vinylon, and polyvinyl chloride. The synthetic resin fibers may be used alone or in combination of two or more selected from these.

The fiber length of the synthetic resin fiber is from the viewpoint of dispersibility in mortar and crack resistance improvement of the mortar cured body.
Preferably it is 4-20mm,
More preferably, it is 6 mm to 18 mm,
More preferably, it is 8-16mm,
Especially preferably, it is 10 mm-14 mm.

The content of the synthetic resin fiber is 100 parts by mass of cement,
Preferably it is 0.11 parts by mass to 0.64 parts by mass,
More preferably, it is 0.21 part by mass to 0.53 part by mass,
More preferably, it is 0.28 mass part-0.47 mass part,
Especially preferably, it is 0.32 mass part-0.43 mass part.

  By setting the fiber length and content of the synthetic resin fiber in the above range, the dispersibility in the mortar and the crack resistance of the mortar cured body can be further improved.

  The polymer cement composition may contain a setting modifier, a thickener, a metal expansion material, an antifoaming agent, and the like depending on the application.

(Ii) Polymer cement mortar The polymer cement mortar includes the polymer cement composition described above and water. The polymer cement mortar can be prepared by blending and kneading the above polymer cement composition and water. The polymer cement mortar thus prepared has excellent fluidity (flow value). For this reason, it is possible to smoothly fill the mold for forming the reinforcing structure. Therefore, it can be suitably used as a polymer cement mortar for the reinforcing structure 20. When preparing the polymer cement mortar, the flow value of the polymer cement mortar can be adjusted by appropriately changing the water powder ratio (water amount / polymer cement composition amount).

The water powder ratio is
Preferably, it is 0.135 to 0.175,
More preferably, it is 0.140-0.170,
More preferably, it is 0.143-0.167,
Particularly preferred is 0.145 to 0.165.

  The flow value in this specification is measured by the following procedure. A cylindrical vinyl chloride pipe having an inner diameter of 50 mm and a height of 100 mm is placed on a glass sheet having a thickness of 5 mm. At this time, it arrange | positions so that one end of a pipe made from a vinyl chloride may contact polishing glass, and the other end may face upward. The polymer cement mortar is poured from the opening on the other end side, and the vinyl chloride pipe is filled with the polymer cement mortar, and then the vinyl chloride pipe is pulled up vertically. After the mortar spread stops, the diameter (mm) in two directions perpendicular to each other is measured. Let the average value of a measured value be a flow value (mm).

The flow value of polymer cement mortar is
Preferably, it is 160 mm to 270 mm,
More preferably, it is 165 mm to 260 mm,
More preferably, it is 170 mm-250 mm.

  When the flow value is in the above range, a polymer cement mortar excellent in material separation resistance and filling property can be obtained.

(Iii) Mortar cured body The mortar cured body can be formed by curing polymer cement mortar. The mortar cured body formed in this way is excellent in strength development when integrated with the reinforced concrete reinforcing column part 21 and the reinforcing beam part 22 constituting the reinforcing structure 20. For this reason, the construction period of a reinforcement construction method can be shortened. Moreover, since it has high compressive strength, the earthquake resistance of the existing building 10 can be improved.

As used herein, “compressive strength” refers to a cylindrical specimen having a diameter of 5 cm and a height of 10 cm in accordance with JIS A 1132: 2014 “How to make a specimen for concrete strength test”, and JIS A 1108: 2006 “Concrete”. Means a value (N / mm ² ) measured according to “compressive strength test method”.

The compressive strength at 7 days of age of the mortar cured body measured by the above test method is
Preferably, it is 60 N / mm ² or more,
More preferably, it is 61 N / mm ² or more,
More preferably, it is 62 N / mm ² or more.
Particularly preferably, it is 63 N / mm ² or more.

  By using a mortar hardened body having a strength development property that can reach the above-mentioned compressive strength at a material age of 7 days, the construction period of the reinforcing method can be further shortened.

The compressive strength of the cured mortar body as measured by the above test method is 28 days old.
Preferably, it is 65 N / mm ² or more,
More preferably, it is 70 N / mm ² or more,
More preferably, it is 71 N / mm ² or more.
Particularly preferably, it is 72 N / mm ² or more.

  When the compressive strength is in the above-described range, when integrating with the reinforced concrete reinforcing column portion 21 and the reinforcing beam portion 22 constituting the reinforcing structure 20, it is possible to exhibit further excellent seismic performance.

  Returning to FIG. 2, the connecting member 24 connects the beam portion 12 and the reinforcing beam portion 22. In the first embodiment, the connecting member 24 is a reinforcing bar (connected reinforcing bar) bent into a predetermined shape. Specifically, as shown in FIG. 3, the connection member 24 is inserted into both the beam portion 12 and the reinforcing beam portion 22.

  The connecting member 24 includes a main portion 24a extending in a direction orthogonal to the surface of the beam portion 12, one end portion 24b provided integrally with the main portion 24a on one end side of the main portion 24a, and the other end side of the main portion 24a. And the other end 24c provided integrally with the main portion 24a. As shown in FIG. 3, the one end 24 b is connected to a reinforcing bar R <b> 1 embedded in the beam portion 12. The reinforcing bar R1 includes a plurality of main bars R1a and a plurality of shear reinforcement bars R1b. The plurality of main reinforcing bars R1a extend in the horizontal direction so as to penetrate the beam portion 12 and the intersecting portion 13. The plurality of main bars R1a are arranged in a rectangular shape when viewed from the horizontal direction. The plurality of shear reinforcement bars R1b are connected to the main bar R1a so as to surround the plurality of main bars R1a. The shear reinforcing bar R1b may be connected to the main bar R1a by, for example, a binding wire.

  In the first embodiment, the one end 24b may be bent in a hook shape. For example, the one end portion 24b (hook portion) may be bent by approximately 90 ° with respect to the main portion 24a, may be bent by approximately 135 °, or may be bent by approximately 180 °. FIG. 3 shows an example in which the one end portion 24b is bent by approximately 180 ° with respect to the main portion 24a. The bending direction of the one end portion 24b is not particularly limited as long as it is a direction that intersects the main portion 24a, except when bent by about 180 °.

  The one end 24b may be connected to the reinforcing bar R1 while being hooked to the main reinforcing bar R1a, or may be connected to the reinforcing bar R1 while being hooked to the shear reinforcing bar R1b. In particular, it is preferable that the one end 24b is hooked on the main muscle R1a located in the vicinity of the center in the vertical direction, that is, the abdominal muscle, because the construction is easy. In addition, in order to connect the one end part 24b to the reinforcing bar R1, the beam part 12 is partially wound, and the one end part 24b is inserted into the turned part 12a. A predetermined filler 17 is filled in the turned portion 12a. The filler 17 may be, for example, concrete or a generally used cross-sectional repair material (such as cement-based non-shrink grout).

  In the first embodiment, the other end 24c may be bent into a predetermined shape. For example, the other end 24c (bent portion) may be bent by approximately 90 ° with respect to the main portion 24a, may be bent by approximately 135 °, or may be bent by approximately 180 °. FIG. 3 shows an example in which the other end portion 24c is bent by approximately 90 ° with respect to the main portion 24a. The bending direction of the other end portion 24c is not particularly limited as long as it is a direction intersecting the main portion 24a except for a case where it is bent by approximately 180 °.

この場合、接続部材２４（主部２４ａ）と補強梁部２２との定着性を十分に高めることが可能となる。なお、パラメータＦｃは、例えば３３Ｎ／ｍｍ^２〜３９Ｎ／ｍｍ^２程度であってもよい。 The connecting member 24 may not include the one end 24b. In this case, one end side (one end side of the main portion 24a) of the connecting member 24 may be connected to the reinforcing bar R1 (main reinforcing bar R1a, shear reinforcing bar R1b) by welding, or mechanically using various fasteners. R1 (main reinforcement R1a, shear reinforcement R1b) may be connected. The connecting member 24 may not include the other end 24c. Regardless of the presence or absence of the other end portion 24c, the fixing length La in the reinforcing beam portion 22 of the main portion 24a is the parameter S in accordance with Article 17 of the “Reinforced Concrete Structure Calculation Criteria and Explanation” (Architectural Institute of Japan). , _{f t,} d b, the _{F c} respectively S: a correction factor must fixing the length of the connecting members 24, 1.25 in the case the other end portion 24c of the connecting member 24 is straight, connecting member 24 0.70 when the other end 24c has a bent portion bent into a predetermined shape.
f _t : Short-term allowable tensile stress degree of connecting member 24 d _b : Numerical value of diameter by name of connecting member 24 F _c : Formula 3 may be satisfied when defined as concrete design standard strength.

In this case, it is possible to sufficiently improve the fixing property between the connection member 24 (main portion 24a) and the reinforcing beam portion 22. The parameter Fc may be, for example, ^33N / mm ^{2 ~39N} / mm 2 approximately.

  Then, the method (manufacturing method of the reinforcement structure 20) which constructs the reinforcement structure 20 which concerns on 1st Embodiment with respect to the intermediate | middle layer part of the existing building 10 is demonstrated. First, a predetermined portion of the beam portion 12 located in the intermediate layer portion is wound with a concrete hammer or the like, and a plurality of turned portions 12a are formed in the beam portion 12 so that the reinforcing bar R1 of the beam portion 12 is exposed. Next, the one end 24b of the connecting member 24 is hooked on the reinforcing bar R1 (for example, the abdominal muscle of the main reinforcing bars R1a) exposed in the bent portion 12a. Thereby, the connection member 24 (one end part 24b) is connected to the reinforcing bar R1.

  Next, a reinforcing bar is arranged on the outer wall surface of the existing building 10 and at a position corresponding to the column part 11, the beam part 12, and the intersection part 13 (see FIG. 2). Next, a beam part formwork is configured so as to cover the reinforcing bars arranged in the beam part 12. As a result, the reinforcing bar is surrounded by the beam part formwork and the outer wall surface of the beam part 12. Next, concrete is placed in the beam form. At this time, the concrete is also filled into the turned portion 12a. After the concrete is hardened to become a hardened concrete body, the reinforcing beam 22 is formed at a position corresponding to the beam 12 by removing the beam form.

Next, the crossing formwork is configured so as to cover the reinforcing bars arranged in the crossing part 13 at both ends of the reinforcing beam part 22 formed in the previous step. As a result, the reinforcing bars are surrounded by the cross section formwork and the outer wall surface of the cross section 13. Next, the polymer cement mortar is filled in the mold for intersection. The filling of the polymer cement mortar into the cross form for the crossing is performed after the penetration resistance value of the concrete placed in the form for the beam part becomes 0.1 N / mm ² or more (for example, about 2 hours elapses). After). After the polymer cement mortar is hardened to form a mortar hardened body, the crossing part form is removed, so that the reinforcing crossing portions 23 are formed at positions corresponding to the crossing portion 13 and at both ends of the reinforcing beam portion 22. . Here, the “penetration resistance value” is a value obtained by the test method described in JIS A 1147-2007 “Concrete setting time test method”.

  Next, on the upper side of the reinforcing intersection 23 formed in the previous step, the column part form is configured so as to cover the reinforcing bars arranged in the column part 11. Thus, the reinforcing bars are surrounded by the column part formwork and the outer wall surface of the column part 11. Next, concrete is placed in the column form. By removing the column part formwork after the concrete has hardened to become a concrete hardened body, the reinforcing column part 21 is formed at a position corresponding to the column part 11 and above the reinforcing intersection part 23. In other words, the reinforcing intersection 23 formed in the previous step is located at the lower end of the reinforcing pillar 21.

  Next, on the upper end side of the reinforcing column portion 21 formed in the previous step, the crossing formwork is configured so as to cover the reinforcing bars arranged in the crossing portion 13. As a result, the reinforcing bars are surrounded by the cross section formwork and the outer wall surface of the cross section 13. Next, the polymer cement mortar is filled in the mold for intersection. After the polymer cement mortar is hardened to form a mortar cured body, the crossing part form is removed, so that the reinforcing crossing part 23 is formed at a position corresponding to the crossing part 13 and above the reinforcing column part 21. In other words, the reinforcing intersection 23 formed in the current process is located at the upper end of the reinforcing pillar 21.

  Hereinafter, similarly to the above, the reinforcing column part 21, the reinforcing beam part 22, and the reinforcing intersection part 23 are sequentially formed from the lower side to the upper side of the existing building 10. As described above, the reinforcing structure 20 is provided in the existing building 10, and the reinforced building 1A is completed.

  In the first embodiment as described above, the connection member 24 is inserted into both the beam portion 12 and the reinforcing beam portion 22, and one end portion 24 b of the connection member 24 is a reinforcing bar R1 (main bar R1a) in the beam portion 12. )It is connected to the. Therefore, since the connecting member 24 is firmly attached to the beam portion 12, the reinforcing structure is compared with the case where the beam portion 12 and the reinforcing beam portion 22 are connected using a post-construction anchor fixed to the concrete. The weight of 20 is transmitted to the beam portion 12 through the connecting member 24 very reliably. Therefore, since the reinforcement structure 20 is supported with respect to the existing building 10, without constructing the reinforcement structure 20 with respect to the lower layer part of the existing building 10, it is in the middle layer part of the existing building 10 where reinforcement is required. Reinforcement can be performed. As a result, it is possible to easily and inexpensively reinforce the intermediate layer portion of the existing building 10.

  In the first embodiment, the connecting member 24 is inserted through the beam portion 12 and the reinforcing beam portion 22. However, the connecting member 24 is inserted through the column portion 11 and the reinforcing column portion 21. The one end 24b of the connecting member 24 may be connected to the reinforcing bar in the column part 11. In this case, the same effect can be obtained.

  In the first embodiment, the one end 24b of the connection member 24 is bent in a hook shape, and the one end 24b is connected in a state of being hooked on the reinforcing bar R1 (main bar R1a) in the beam portion 12. Therefore, it becomes possible to connect the connecting member 24 and the reinforcing bar R1 in the beam portion 12 very simply.

  In the first embodiment, the other end 24c of the connection member 24 is bent into a predetermined shape. Therefore, compared with the case where the other end 24c of the connecting member 24 is linear, the fixing length at the reinforcing beam portion 22 on the other end 24c side of the connecting member 24 can be shortened.

  In the first embodiment, when concrete is placed in the beam formwork, the turned portion 12a in which the concrete is beaten is also filled with the concrete. Therefore, the process of filling the turned portion 12a with another filler becomes unnecessary. Therefore, the reinforcing structure 20 can be easily manufactured.

  In addition, when constructing the reinforcing structure 20 according to the first embodiment, the bend portion 12a may be pre-filled with the filler 17 before the concrete is placed in the beam form. In this case, the intrusion of water or the like into the turned portion 12a is suppressed, and the reinforcing bars of the existing building 10 are hardly corroded. Therefore, it is possible to increase the long-term strength of the reinforced building 1A in which the reinforced structure 20 is applied to the existing building 10.

  Here, the number of the connection members 24 in which the reinforcing structure 20 does not fall off from the existing building 10 was examined with respect to the reinforcing structure 20 per structural surface. FIG. 4A shows an example of the reinforcing structure 20 having a single plane. 4B shows a cross-sectional view taken along the line BB in FIG. 4A, that is, a cross-sectional view of the reinforcing column portion 21, and FIG. 4C shows a cross-sectional view taken along the line CC in FIG. The figure, ie, sectional drawing of the reinforcement beam part 22, is shown.

Various conditions of the reinforcing structure 20 shown in FIG. 4 were set as follows.
・ Reinforcing pillar 21
Cross-sectional shape: 600 mm x 600 mm
Main muscle: 10-D29 (SD390)
Shear reinforcement: 3-U12.6@100
・ Reinforcement beam 22
Cross-sectional shape: 600 mm x 600 mm
Main muscle: 6-D32 (SD490)
Shear reinforcement: 2-U12.6@200
・ Span: 5500mm
・ Inner span: 4900mm
-Floor height: 2800mm
・ Inner height: 2200mm
-Unit volume weight: 24 kN / m ³ (In “Table 7.1 Unit Volume Weight of Reinforced Concrete” in Article 7 of “Reinforced Concrete Structure Calculation Standards and Explanation” (The Architectural Institute of Japan), the range of design standard strength is F _c ≦ (The unit volume weight in the case of ordinary concrete which is 36 N / mm ² was used.)

Next, the self-weight N _L of the reinforcing structure 20 per structural surface was obtained based on Equation 4.
N _L = [2 × column width × column formation × inner method height + 2 × {beam width × beam formation × (inner method span + column formation)}] × unit volume weight
= [2 × 0.6 × 0.6 × 2.2 + 2 × {0.6 × 0.6 × (5.5 + 0.6)}] × 24
= 143.4kN (4)

Then, the number of connecting members 24 necessary to support the weight N _L of the reinforcing structure 20 per Plane calculated in this manner was determined for each size and grade of the connecting member 24. The results are shown in Table 1. The shape of the connection member 24 was the same as that shown in FIG. The fixing length La in the reinforcing beam portion 22 in the main portion 24a is set to a length satisfying the expression (2). Allowable stress of the connecting member 24 is, "reinforced concrete structure calculation criteria, the commentary" (Architectural Institute of Japan) long-term shear reinforcement in Article 6, "Table 5 rebar of allowable stress" and _{(f t = 195N / mm 2} ) Using. The connecting member 24 is provided on the beam portions 12 adjacent in the vertical direction, the reinforcing beam portions 22, and shall bear half of its own weight N _L of the reinforcing structure 20 per Plane.

[2] Second Embodiment Next, the structure of a reinforced building 1B according to a second embodiment will be described with reference to FIGS. The reinforced building 1B is different from the reinforced building 1A according to the first embodiment in the point of the reinforcing structure 20 (particularly, the point of the connecting member 24). Below, it demonstrates centering around difference with the reinforced building 1A which concerns on 1st Embodiment, and the overlapping description is abbreviate | omitted.

  Also in 2nd Embodiment, the column part 11 is comprised with the reinforced concrete. Specifically, as shown in FIGS. 6 and 7, a reinforcing bar R <b> 2 is embedded in the column portion 11. The reinforcing bar R2 includes a plurality of main reinforcing bars R2a (columnar main bars) and a plurality of shear reinforcing bars R2b. The plurality of main reinforcing bars R2a extend in the vertical direction so as to penetrate the column part 11 and the intersecting part 13. That is, the plurality of main reinforcing bars R <b> 2 a extend along the extending direction of the column part 11. The plurality of main reinforcing bars R2a are arranged in a rectangular shape when viewed from the vertical direction. The plurality of shear reinforcement bars R2b are connected to the main bar R2a so as to surround the plurality of main bars R2a. The shear reinforcing bar R2b may be connected to the main bar R2a by, for example, a binding wire.

  Also in 2nd Embodiment, the reinforcement pillar part 21 is comprised by the reinforced concrete. Specifically, as shown in FIGS. 6 and 7, a reinforcing bar R <b> 3 is embedded in the reinforcing column portion 21. The reinforcing bar R3 includes a plurality of main reinforcing bars R3a (reinforcing column main bars) and a plurality of shear reinforcing bars R3b. The plurality of main reinforcing bars R <b> 3 a extend in the vertical direction so as to penetrate the reinforcing column part 21 and the reinforcing intersection part 23. That is, the plurality of main reinforcing bars R <b> 3 a extend along the extending direction of the reinforcing column part 21. The plurality of main bars R3a are arranged in a rectangular shape when viewed from the vertical direction. The plurality of shear reinforcement bars R3b are connected to the main bar R3a so as to surround the plurality of main bars R3a. The shear reinforcing bar R3b may be connected to the main bar R3a by, for example, a binding wire.

  The reinforcing structure 20 according to the second embodiment further includes an auxiliary pillar portion 25. The auxiliary column portion 25 is provided above the reinforcing intersection portion 23 located on the upper end side of the reinforcing column portion 21. Similarly, as shown in FIG. 5, the auxiliary column portion 25 is provided below the reinforcing intersection portion 23 located on the lower end side of the reinforcing column portion 21. That is, the auxiliary column portion 25 is provided on each of the upper end side and the lower end side of the reinforcing column portion 21. Hereinafter, when it is necessary to distinguish, the auxiliary column portion 25 positioned on the upper end side of the reinforcing column portion 21 is referred to as the upper auxiliary column portion 25, and the auxiliary column portion 25 positioned on the lower end side of the reinforcing column portion 21 is referred to as the lower portion. It calls the side auxiliary pillar part 25. The reinforcing structure 20 may not include the lower auxiliary pillar portion 25.

  The auxiliary column part 25 may be comprised with the concrete hardened | cured material, and may be comprised with the polymer cement mortar hardened | cured material. If the auxiliary column part 25 is comprised with a concrete hardening body, the reinforcement structure 20 can be manufactured at low cost. On the other hand, when the auxiliary column part 25 is comprised with the polymer cement mortar hardening body, since the auxiliary column part 25 can be constructed simultaneously with the reinforcement crossing part 23, a construction period can be shortened.

  The upper auxiliary pillar portion 25 has a portion that decreases in thickness in the first direction (left-right direction in FIG. 7) orthogonal to the surface of the pillar portion 11. The lower auxiliary pillar portion 25 has a portion whose thickness in the first direction decreases as it goes downward. That is, the surface of the auxiliary column part 25 is inclined with respect to the surfaces of the column part 11 and the reinforcing column part 21. The gradient defined by the height of the auxiliary column part 25 in the first direction relative to the length of the auxiliary column part 25 in the vertical direction is preferably 1/3 or less, and more preferably 1/6 or less. In this case, since it becomes difficult to concentrate force on the auxiliary column part 25, the strength of the reinforcing structure 20 can be further increased.

  In 2nd Embodiment, the connection member 24 is provided in the upper end part and lower end part of main reinforcement R3a, respectively. The connecting member 24 is a reinforcing bar including a joint portion 24d and a connecting portion 24e (see FIGS. 6 and 7). Since the joint portion 24d and the connection portion 24e have the same configuration at the upper end portion and the lower end portion of the main reinforcement R3a, the joint portion 24d and the connection portion 24e will be described here with respect to the upper end portion of the main reinforcement R3a.

  The joint portion 24d is connected to the reinforcing bar R2 of the column portion 11. In the example shown in FIGS. 6 and 7, the joint portion 24 d extends along the main bar R <b> 2 a of the column portion 11 and is connected by a lap joint. The length of the lap joint may be about 40 to 50 times the diameter of the reinforcing bar R2, for example, about 520 mm to 1100 mm. The length of the lap joint may be defined in accordance with Equations 16.8 and 16.9 of Article 16 of the “Reinforced Concrete Structural Calculation Standards / Explanation” (The Architectural Institute of Japan). The joint portion 24d may be connected to the reinforcing bar R2 (main reinforcing bar R2a, shear reinforcing bar R2b) by welding, regardless of the lap joint, or mechanically by various fasteners, the reinforcing bar R2 (main reinforcing bar R2a, shear reinforcing bar) R2b) may be connected. In addition, in order to connect the joint part 24d to the main reinforcement R2a, the column part 11 is partially beaten, and the connection part R3c is inserted through the turn part 11a (see FIG. 7). A predetermined filler 17 is filled in the turned portion 11a.

  The upper end of the joint portion 24d may be linear or bent into a predetermined shape. 6 and 7 show an example in which the joint portion 24d is bent into a substantially U shape. When the upper end of the joint portion 24d is bent into a predetermined shape, the reinforcing structure 20 is unlikely to drop out of the existing building 10 even if the main reinforcement R3a is pulled by its own weight.

  In the second embodiment, the connecting portion 24e is integrally connected to the upper end of the main reinforcement R3a and the lower end of the joint portion 24d. That is, it can be said that the joint portion 24d and the connecting portion 24e are part of the main reinforcement R3a. The connecting portion 24e protrudes upward from the upper end side of the reinforcing column portion 21 (the upper end of the reinforcing intersection portion 23) and is connected to the joint portion 24d. Therefore, the connecting portion 24e is inclined obliquely from the upper end side of the reinforcing column portion 21 (the upper end of the reinforcing intersection portion 23) to the joint portion 24d. The connecting portion 24 e is embedded in the auxiliary pillar portion 25. In addition, the connection part 24e does not need to be integrally connected with the main reinforcement R3a. That is, the connecting member 24 may be separate from the main muscle R3a. In this case, the connecting portion 24e and the main reinforcement R3a may be connected by various methods such as a lap joint, welding, and a fastener.

  Then, the method to construct the reinforcement structure 20 which concerns on 2nd Embodiment with respect to the intermediate | middle layer part of the existing building 10 is demonstrated. First, a predetermined portion of the column portion 11 located in the intermediate layer portion is wound with a concrete hammer or the like, and a plurality of turned portions 11a are formed in the column portion 11 so that the reinforcing bar R2 of the column portion 11 is exposed. Next, reinforcing bars are arranged on the outer wall surface of the existing building 10 and at positions corresponding to the column part 11, the beam part 12, and the intersection part 13 (see FIG. 6). At this time, the reinforcing bar R3 is arranged so that the connecting part R3c extends along the reinforcing bar R2 (for example, the main reinforcing bar R2a) exposed in the turn part 11a.

  Next, the auxiliary column part formwork is configured so as to cover the lower end portion (the connecting portion R3c and the connecting portion R3d) of the main reinforcement R3a. Thereby, the lower end part of the main reinforcement R3a is surrounded by the auxiliary column part mold and the outer wall surface of the column part 11. Next, concrete is placed in the auxiliary column part formwork. At this time, the concrete is also filled into the turned portion 11a. After the concrete is hardened to become a hardened concrete body, the auxiliary pillar part formwork is removed, whereby the lower auxiliary pillar part 25 is formed on the pillar part 11.

  Next, the beam part formwork is configured so as to cover the reinforcing bars arranged in the beam part 12 between the lower auxiliary pillar parts 25 formed in the previous step. As a result, the reinforcing bar is surrounded by the beam part formwork and the outer wall surface of the beam part 12. Next, concrete is placed in the beam form. At this time, the concrete is also filled into the turned portion 12a. After the concrete is hardened to become a hardened concrete body, the beam form is removed to form the reinforcing beam portion 22 at a position corresponding to the beam portion 12.

  Next, on the upper side of the lower auxiliary pillar portion 25 formed in the previous step and on both end sides of the reinforcing beam portion 22 formed in the previous step, the intersection portion covers the reinforcing bars arranged in the intersection portion 13. Configure the formwork. As a result, the reinforcing bars are surrounded by the cross section formwork and the outer wall surface of the cross section 13. Next, the polymer cement mortar is filled in the mold for intersection.

  Next, on the upper side of the reinforcing intersection 23 formed in the previous step, the column part form is configured so as to cover the reinforcing bars arranged in the column part 11. Thus, the reinforcing bars are surrounded by the column part formwork and the outer wall surface of the column part 11. Next, concrete is placed in the column form. By removing the column part formwork after the concrete has hardened to become a concrete hardened body, the reinforcing column part 21 is formed at a position corresponding to the column part 11 and above the reinforcing intersection part 23. In other words, the reinforcing intersection 23 formed in the previous step is located at the lower end of the reinforcing pillar 21.

  Next, on the upper end side of the reinforcing column portion 21 formed in the previous step, the crossing formwork is configured so as to cover the reinforcing bars arranged in the crossing portion 13. As a result, the reinforcing bars are surrounded by the cross section formwork and the outer wall surface of the cross section 13. Next, the polymer cement mortar is filled in the mold for intersection. After the polymer cement mortar is hardened to form a mortar cured body, the crossing part form is removed, so that the reinforcing crossing part 23 is formed at a position corresponding to the crossing part 13 and above the reinforcing column part 21. In other words, the reinforcing intersection 23 formed in the current process is located at the upper end of the reinforcing pillar 21.

  Hereinafter, similarly to the above, the reinforcing column part 21, the reinforcing beam part 22, and the reinforcing intersection part 23 are sequentially formed from the lower side to the upper side of the existing building 10. Thereafter, on the upper end side of the reinforcing intersection portion 23 formed in the previous step, the auxiliary column part formwork is configured to cover the upper end portion (the connecting portion R3c and the connecting portion R3d) of the main reinforcement R3a. Thus, the upper end portion of the main reinforcement R3a is surrounded by the auxiliary column part mold and the outer wall surface of the column part 11. Next, concrete is placed in the auxiliary column part formwork. At this time, the concrete is also filled into the turned portion 11a. By removing the auxiliary column part formwork after the concrete has hardened to become a hardened concrete body, the upper auxiliary column part 25 is formed on the column part 11. As described above, the reinforcing structure 20 is provided in the existing building 10, and the reinforced building 1A is completed.

  In the second embodiment as described above, the upper end portion of the main bar R3a protrudes upward from the upper end side of the reinforcing column part 21 and the connection part R3c extending along the main bar R2a of the column part 11 and connected by the lap joint. The connection part R3c and the connection part R3d connected are included. Therefore, compared with the case where the column part 11 and the reinforcement column part 21 are connected using the post-construction anchor fixed to the concrete, the weight of the reinforcing structure 20 is extremely high on the column part 11 via the main reinforcement R3a. Reliable transmission. Therefore, since the reinforcement structure 20 is supported with respect to the existing building 10, without constructing the reinforcement structure 20 with respect to the lower layer part of the existing building 10, it is in the middle layer part of the existing building 10 where reinforcement is required. Reinforcement can be performed. As a result, it is possible to easily and inexpensively reinforce the intermediate layer portion of the existing building 10.

  In the second embodiment, the auxiliary pillar portion 25 has a portion where the thickness in the first direction decreases as it goes upward. Therefore, the force concentrates on the auxiliary pillar portion 25 and it becomes difficult to act, so that the strength of the reinforcing structure 20 can be increased. In addition, since the auxiliary pillar part 25 in which the connecting part R3d is embedded has a constant thickness in the vertical direction, less material is required to form the auxiliary pillar part 25. It can be configured at low cost.

  In addition, also when constructing the reinforcing structure 20 according to the second embodiment, the curled portion 11a may be filled in advance with the filler 17 before placing concrete in the auxiliary column part formwork. In this case, the intrusion of water or the like into the turned portion 11a is suppressed, and the reinforcing bars and the like of the existing building 10 are hardly corroded. Therefore, it is possible to increase the long-term strength of the reinforced building 1B in which the reinforced structure 20 is applied to the existing building 10.

  Moreover, as FIG. 6 shows, only the main reinforcement R3a located in the surface side of the reinforcement pillar part 21 among the reinforcing bars R3 may contain the connection part R3c and the connection part R3d, or the pillar part 11 of the reinforcing bars R3. Only the main muscle R3a located closer may include the connecting portion R3c and the connecting portion R3d, or all the main bars R3a may include the connecting portion R3c and the connecting portion R3d. In any case, as long as the reinforcing structure 20 can be held with respect to the existing building 10, the reinforcing bar R3 may have at least one main reinforcing bar R3a including the connecting part R3c and the connecting part R3d.

[3] Third Embodiment Next, the structure of a reinforced building 1C according to a third embodiment will be described with reference to FIG. The reinforced building 1C is different from the reinforced building 1A according to the first embodiment in the point of the reinforcing structure 20 (particularly, the point of the connecting member 24). Below, it demonstrates centering around difference with the reinforced building 1A which concerns on 1st Embodiment, and the overlapping description is abbreviate | omitted.

  The connection member 24 according to the third embodiment is a wire rope (hereinafter, referred to as “wire rope 24” in the description of the third embodiment). The wire rope 24 is disposed inside both of the column 11 and the reinforcement column 21 while being hooked on the reinforcing bars (main reinforcement or shear reinforcement) of the column 11 and suspended in the reinforcement column 21. Yes. The several wire rope 24 may be arrange | positioned in the reinforcement pillar part 21 so that it may adjoin in the perpendicular direction. The hook position of the wire rope 24 with respect to the reinforcing bar of the column part 11 may be adjusted as appropriate, and the wire rope 24 may be hooked on one main bar or one shear reinforcement bar, or a plurality of main bars or a plurality of shear bars. It may be hooked over the reinforcing bar. The wire rope 24 may be disposed in the reinforcing column 21 so that both ends of the wire rope 24 are not biased in the reinforcing column 21. Both ends of the wire rope 24 may or may not be connected to the reinforcing bars in the reinforcing column portion 21.

  The total length of the wire rope 24 may be, for example, about 3 m to 6 m. The wire rope 24 that is hooked on the reinforcing bar of the column part 11 may extend between the adjacent reinforcing intersections 23 (that is, the inner height or more). In addition, in order to connect the wire rope 24 to the main reinforcement of the pillar part 11, the pillar part 11 is partially wound, and a part of wire rope 24 is arrange | positioned at the said twist part 11a. A predetermined filler 17 is filled in the turned portion 11a.

  The reinforcing structure 20 according to the third embodiment may be applied according to a method for applying the reinforcing structure 20 according to the first embodiment.

  In the third embodiment as described above, the wire rope 24 is hooked on the reinforcing bar of the column part 11 and is suspended in the reinforcement column part 21 so as to extend over both the column part 11 and the reinforcement column part 21. Has been placed. Therefore, since the wire rope 24 is firmly attached to the column portion 11, the reinforcement structure is compared with the case where the column portion 11 and the reinforcement column portion 21 are connected using a post-construction anchor fixed to the concrete. The weight of 20 is transmitted to the column part 11 via the wire rope 24 very reliably. Therefore, since the reinforcement structure 20 is supported with respect to the existing building 10, without constructing the reinforcement structure 20 with respect to the lower layer part of the existing building 10, it is in the middle layer part of the existing building 10 where reinforcement is required. Reinforcement can be performed. As a result, it is possible to easily and inexpensively reinforce the intermediate layer portion of the existing building 10.

[4] Fourth Embodiment Next, the structure of a reinforced building 1D according to a fourth embodiment will be described with reference to FIG. The reinforced building 1D is different from the reinforced building 1C according to the third embodiment in the point of the reinforcing structure 20 (particularly, the point of the connecting member 24). Below, it demonstrates centering around difference with the reinforced building 1C which concerns on 3rd Embodiment, and the overlapping description is abbreviate | omitted.

  The connection member 24 according to the fourth embodiment is a reinforcing bar bent into a predetermined shape. The connecting member 24 is inserted through both the pillar portion 11 and the reinforcing pillar portion 21 into both of them.

  The connection member 24 includes one end portion 24f, the other end portion 24g, and an intermediate portion 24h. The one end 24f is connected to a reinforcing bar R2 (main reinforcing bar R2a or shear reinforcing bar R2b) embedded in the column part 11. The one end 24f may be bent in a hook shape. For example, the one end 24f (hook portion) may be bent by approximately 90 ° with respect to the intermediate portion 24h, may be bent by approximately 135 °, or may be bent by approximately 180 °. FIG. 9 shows an example in which the one end portion 24f is bent by approximately 135 ° with respect to the intermediate portion 24h.

  The one end 24f may be connected to the reinforcing bar R2 while being hooked on the main reinforcing bar R2a, or may be connected to the reinforcing bar R2 while being hooked on the shear reinforcing bar R2b. In addition, in order to connect the one end part 24f to the reinforcing bar R2, the column part 11 is partially wound, and the one end part 24f is inserted through the turned part 11a. A predetermined filler 17 is filled in the turned portion 11a. The filler 17 may be, for example, concrete or a generally used cross-sectional repair material (such as cement-based non-shrink grout).

  The other end 24g is suspended along the vertical direction (reinforcing column 21) in the reinforcing column 21. The lower end of the other end 24g may extend linearly or may be bent like a hook. The length of the other end 24g may be, for example, about 500 mm to 900 mm. When the lower end of the other end 24g is linear, the length of the other end 24g may be, for example, about 35 to 40 times the diameter of the connecting member 24. When the lower end of the other end 24g is bent in a hook shape, the length of the other end 24g may be, for example, about 25 to 30 times the diameter of the connection member 24. The other end 24g may extend between adjacent reinforcing intersections 23 (that is, the inner height or more).

  The intermediate portion 24h is provided integrally with the one end portion 24f and the other end portion 24g so as to connect with each other. The intermediate portion 24h extends obliquely downward from the one end portion 24f side toward the other end portion 24g side.

  In the fourth embodiment, a plurality of connecting members 24 may be arranged in the reinforcing column portion 21 so as to be adjacent in the vertical direction. The hooking position of the connecting member 24 with respect to the reinforcing bar R2 of the column part 11 may be adjusted as appropriate, and the connecting member 24 (one end 24f) may be hooked on one main reinforcing bar R2a or one shear reinforcing bar R2b. Further, it may be hooked over a plurality of main reinforcing bars R2a and a plurality of shear reinforcing bars R2b. The connecting member 24 may be arranged in the reinforcing column 21 so that the connecting member 24 (the other end 24g) is not biased in the reinforcing column 21. The connection member 24 (the other end 24g) may or may not be connected to the reinforcing bar in the reinforcing column portion 21. In addition, in order to connect the connection member 24 (one end part 24f) to the reinforcing bar R2 of the column part 11, the column part 11 is partially beaten, and the one end part 24f is arranged in the turned part 11a. A predetermined filler 17 is filled in the turned portion 11a.

  The reinforcing structure 20 according to the fourth embodiment may be applied according to a method for applying the reinforcing structure 20 according to the first embodiment.

  In the fourth embodiment as described above, the same operational effects as those in the third embodiment are obtained.

[5] Fifth Embodiment Next, the structure of a reinforced building 1E according to a fifth embodiment will be described with reference to FIG. The reinforced building 1E is different from the reinforced building 1A according to the first embodiment in the point of the reinforcing structure 20 (particularly, the point of the connecting member 24). Below, it demonstrates centering around difference with the reinforced building 1A which concerns on 1st Embodiment, and the overlapping description is abbreviate | omitted.

  The connection member 24 according to the fifth embodiment is a linear reinforcing bar having male screw portions at least at both ends. The connecting member 24 is inserted through both the beam portion 12 and the reinforcing beam portion 22 so as to penetrate the beam portion 12. The connection member 24 is inserted into a through hole 12b provided so as to extend along a direction orthogonal to the surface of the beam portion 12. A predetermined filler 17 is filled in the through hole 12b. In addition, the end part in the reinforcement beam part 22 among the connection members 24 in 5th Embodiment may be extended linearly similarly to 1st Embodiment, and may be bent by hook shape. The fixing length La in the reinforcing beam portion 22 of the connection member 24 in the fifth embodiment may also satisfy Equation 3 as in the first embodiment.

  Then, the method to construct the reinforcement structure 20 which concerns on 5th Embodiment with respect to the intermediate | middle layer part of the existing building 10 is demonstrated. First, a predetermined portion of the beam portion 12 located in the intermediate layer portion is drilled with a drill or the like to form a through hole 12b that penetrates the beam portion 12. Next, the connection member 24 is inserted into the through hole 12b, and a nut is fastened to the male screw portion exposed to the outside of the beam portion 12 via a washer. Thereby, the connection member 24 is attached to the beam portion 12. Depending on the size of the through hole 12b and the nut, the nut may be fastened to the male screw portion without using a washer. Next, the filler 17 is filled into the through hole 12b so as to fill the space between the connecting member 24 and the through hole 12b.

  Below, similarly to 1st Embodiment, the reinforcement pillar part 21, the reinforcement beam part 22, and the reinforcement intersection part 23 are formed in order toward the upper side from the lower side of the existing building 10. FIG. Thereby, the reinforced structure 20 is provided in the existing building 10, and the reinforced building 1E is completed.

  In the fifth embodiment as described above, the connection member 24 is inserted through both the beam portion 12 and the reinforcing beam portion 22 so as to penetrate the beam portion 12. Therefore, since the connecting member 24 is firmly attached to the beam portion 12, the connecting member 24 is compared with the case where the beam portion 12 and the reinforcing beam portion 22 are connected using a post-construction anchor fixed to the concrete. Thus, the weight of the reinforcing structure 20 is transmitted to the beam portion 12 very reliably. Therefore, since the reinforcement structure 20 is supported with respect to the existing building 10, without constructing the reinforcement structure 20 with respect to the lower layer part of the existing building 10, it is in the middle layer part of the existing building 10 where reinforcement is required. Reinforcement can be performed. As a result, it is possible to easily and inexpensively reinforce the intermediate layer portion of the existing building 10.

[6] Sixth Embodiment Next, the structure of a reinforced building 1F according to a sixth embodiment will be described with reference to FIG. The reinforced building 1F is different from the reinforced building 1E according to the fifth embodiment in the point of the reinforcing structure 20 (particularly, the point of the connecting member 24). Specifically, the connection member 24 according to the sixth embodiment is inserted through both the column portion 11 and the reinforcing column portion 21 so as to penetrate the column portion 11. The reinforcing structure 20 according to the sixth embodiment can also be constructed in the same manner as in the fifth embodiment, and has the same effects as the fifth embodiment.

[7] Seventh Embodiment Next, the structure of a reinforced building 1G according to a seventh embodiment will be described with reference to FIG. The reinforced building 1G is different from the reinforced building 1A according to the first embodiment in terms of the existing building 10 (particularly the beam portion 12) and the reinforced structure 20 (particularly the point of the connecting member 24). Below, it demonstrates centering around difference with the reinforced building 1A which concerns on 1st Embodiment, and the overlapping description is abbreviate | omitted.

  The beam portion 12 is made of reinforced steel concrete. Specifically, a reinforcing bar R1 and a steel frame SF1 are embedded in the beam portion 12. The steel frame SF1 extends in the center of the beam portion 12 so as to be surrounded by the shear reinforcement R1b. Reinforcing bar R1 and steel frame SF1 are embedded in the beam portion 12 corresponding to the lower layer portion of the existing building 10, and the reinforcing bar R1 is embedded in the beam portion 12 corresponding to the middle and upper layer portion of the existing building 10, and the steel frame SF1 is formed. It does not have to be buried.

  The connecting member 24 according to the seventh embodiment is a linear reinforcing bar having male thread portions at both ends. The connecting member 24 is inserted through both the beam portion 12 and the reinforcing beam portion 22 into both of them. The connection member 24 is inserted into a through hole 12b provided so as to extend along a direction orthogonal to the surface of the beam portion 12. The through hole 12b extends from the surface of the beam portion 12 to the steel frame SF1. One end of the connecting member 24 in the beam portion 12 is connected to the steel frame SF1. In the example shown in FIG. 12, the male screw portion on one end side in the beam portion 12 of the connecting member 24 is screwed into the web of the steel frame SF1. A predetermined filler 17 is filled in the through hole 12b. In addition, the end part in the reinforcement beam part 22 among the connection members 24 in 7th Embodiment may be extended linearly similarly to 1st Embodiment, and may be bent by hook shape. The fixing length La in the reinforcing beam portion 22 of the connection member 24 in the seventh embodiment may also satisfy Equation 3 as in the first embodiment.

  Then, the method to construct the reinforcement structure 20 which concerns on 7th Embodiment with respect to the intermediate | middle layer part of the existing building 10 is demonstrated. First, a predetermined portion of the beam portion 12 is drilled with a drill or the like to form a through hole 12b penetrating from the surface of the beam portion 12 to the web of the steel frame SF1. Next, the connecting member 24 is inserted into the through hole 12b, and a screw hole is formed in the web of the steel frame SF1 through the through hole 12b. Next, the male screw portion on one end side in the beam portion 12 of the connecting member 24 is fastened to the screw hole of the web. Thereby, the connection member 24 is attached to the steel frame SF1. Next, the filler 17 is filled into the through hole 12b so as to fill the space between the connecting member 24 and the through hole 12b.

  Below, similarly to 1st Embodiment, the reinforcement pillar part 21, the reinforcement beam part 22, and the reinforcement intersection part 23 are formed in order toward the upper side from the lower side of the existing building 10. FIG. Thereby, the reinforced structure 20 is provided in the existing building 10, and the reinforced building 1G is completed.

  In the seventh embodiment as described above, the connection member 24 is inserted into both the beam portion 12 and the reinforcing beam portion 22, and one end portion of the connection member 24 is connected to the steel frame SF <b> 1 in the beam portion 12. Yes. Therefore, since the connecting member 24 is firmly attached to the beam portion 12, the connecting member 24 is compared with the case where the beam portion 12 and the reinforcing beam portion 22 are connected using a post-construction anchor fixed to the concrete. Thus, the weight of the reinforcing structure 20 is transmitted to the beam portion 12 very reliably. Therefore, since the reinforcement structure 20 is supported with respect to the existing building 10, without constructing the reinforcement structure 20 with respect to the lower layer part of the existing building 10, it is in the middle layer part of the existing building 10 where reinforcement is required. Reinforcement can be performed. As a result, it is possible to easily and inexpensively reinforce the intermediate layer portion of the existing building 10.

[8] Eighth Embodiment Next, the structure of a reinforced building 1H according to an eighth embodiment will be described with reference to FIG. The reinforced building 1H is different from the reinforced building 1G according to the seventh embodiment in terms of the existing building 10 (particularly the column portion 11) and the reinforced structure 20 (particularly, the connection member 24).

  The column portion 11 is made of reinforced steel concrete. Specifically, a reinforcing bar R2 and a steel frame SF2 are embedded in the column portion 11. The steel frame SF2 extends in the central portion of the column portion 11 so as to be surrounded by the shear reinforcement R2b. The reinforcing bar R2 and the steel frame SF2 are embedded in the column part 11 corresponding to the lower layer part of the existing building 10, and the reinforcing bar R2 is embedded in the column part 11 corresponding to the middle and upper layer part of the existing building 10, and the steel frame SF2 is formed. It does not have to be buried.

  The connection member 24 according to the eighth embodiment is a linear reinforcing bar having male screw portions at least at both ends. The connecting member 24 is inserted through both the pillar portion 11 and the reinforcing pillar portion 21 into both of them. The connection member 24 is inserted into a through hole 11 b provided so as to extend along a direction orthogonal to the surface of the column part 11. The through hole 11b extends from the surface of the column part 11 to the steel frame SF2. One end of the connecting member 24 in the column portion 11 is connected to the steel frame SF2. In the example shown in FIG. 13, the male screw portion on one end side in the column portion 11 of the connection member 24 is screwed to the flange of the steel frame SF2. A predetermined filler 17 is filled in the through hole 11b.

  The reinforcing structure 20 according to the eighth embodiment can also be constructed in the same manner as in the seventh embodiment, and has the same effects as those in the seventh embodiment.

  The reinforcing structure 20 according to the eighth embodiment further includes a column receiving jig 26. The column receiving jig 26 supports the reinforcing column portion 21 on the lower end side of the reinforcing column portion 21. The column receiving jig 26 is attached to the column portion 11 by a fastener 27. In the eighth embodiment, the fastener 27 includes a linear reinforcing bar 27a and a nut 27b having male screw portions at at least both ends.

  The reinforcing bar 27a is inserted into a through hole 11c provided so as to extend along a direction orthogonal to the surface of the column portion 11. The through hole 11c extends from the surface of the column part 11 to the steel frame SF2. One end part in the pillar part 11 among the reinforcing bars 27a is connected to the steel frame SF2. In the example shown in FIG. 13, the male screw portion on one end side in the column portion 11 of the reinforcing bar 27a is screwed to the flange of the steel frame SF2. A predetermined filler 17 is filled in the through hole 11c. A nut is fastened to the male screw portion on the column support jig 26 side of the reinforcing bar 27a, and the column support jig 26 is attached thereto.

  In this way, the reinforcing column portion 21 (reinforcement) is supported by supporting the reinforcing column portion 21 with the column receiving jig 26 attached to the column portion 11 via the fastener 27 connected to the steel frame SF2 in the column portion 11. The weight of the structure 20) is very reliably transmitted to the column portion via the column receiving jig 26 and the fastener 27.

[9] Ninth Embodiment Next, the structure of a reinforced building 1I according to a ninth embodiment will be described with reference to FIGS. The reinforced building 1I is different from the reinforced building 1A according to the first embodiment in the point of the reinforcing structure 20 (particularly, the point of the connecting member 24). Below, it demonstrates centering around difference with the reinforced building 1A which concerns on 1st Embodiment, and the overlapping description is abbreviate | omitted.

  The connection member 24 according to the ninth embodiment is a bar-shaped steel material (bar steel) having a U-shape. The connecting member 24 extends so as to surround the reinforcing bars constituting the reinforcing beam portion 22. The connection member 24 may be connected to the reinforcing bar of the reinforcing beam portion 22 by welding or the like, or may not be connected to the reinforcing bar of the reinforcing beam portion 22. Both ends of the connecting member 24 are connected to the reinforcing bar R1 (at least one of the main reinforcing bar R1a and the shear reinforcing bar R1b) constituting the beam part 12 by welding.

  Then, the method to construct the reinforcement structure 20 which concerns on 9th Embodiment with respect to the intermediate | middle layer part of the existing building 10 is demonstrated. First, a predetermined portion of the beam portion 12 located in the intermediate layer portion is wound with a concrete hammer or the like, and a plurality of turned portions 12a are formed in the beam portion 12 so that the reinforcing bar R1 of the beam portion 12 is exposed. Next, reinforcing bars constituting the reinforcing beam portion 22 are arranged on the outer wall surface of the existing building 10 and at positions corresponding to the column portion 11, the beam portion 12, and the intersection portion 13.

  Next, a connection member 24 having a U-shape is attached to the reinforcing bar so as to surround the reinforcing bar constituting the reinforcing beam portion 22. At this time, both end portions of the connection member 24 are positioned in the vicinity of the reinforcing bar R1 exposed at the turned portion 12a. Next, both ends of the connecting member 24 are welded to the reinforcing bar R1 (for example, the shear reinforcing bar R1b) exposed at the turning part 12a. Thereby, the connection member 24 is connected to the reinforcing bar R1.

  Next, a beam part formwork is configured so as to cover the reinforcing bars arranged in the beam part 12. As a result, the reinforcing bar is surrounded by the beam part formwork and the outer wall surface of the beam part 12. Next, concrete is placed in the beam form. At this time, the concrete is also filled into the turned portion 12a. In addition, after welding the connection member 24 to the reinforcing bar R1, the filling material 17 may be filled in the turned portion 12a. After the concrete is hardened to become a hardened concrete body, the reinforcing beam 22 is formed at a position corresponding to the beam 12 by removing the beam form.

  Below, similarly to 1st Embodiment, the reinforcement pillar part 21, the reinforcement beam part 22, and the reinforcement intersection part 23 are formed in order toward the upper side from the lower side of the existing building 10. FIG. Thereby, the reinforced structure 20 is provided in the existing building 10, and the reinforced building 1I is completed.

  In the ninth embodiment as described above, both ends of the connecting member 24 are welded to the reinforcing bar R <b> 1 of the beam portion 12 while the connecting member 24 holds the reinforcing bar constituting the reinforcing beam portion 22. Therefore, since the connecting member 24 is securely attached to the beam portion 12, the connecting member 24 is compared with the case where the beam portion 12 and the reinforcing beam portion 22 are connected using a post-construction anchor fixed to the concrete. Thus, the weight of the reinforcing structure 20 is transmitted to the beam portion 12 very reliably. Therefore, since the reinforcement structure 20 is supported with respect to the existing building 10, without constructing the reinforcement structure 20 with respect to the lower layer part of the existing building 10, it is in the middle layer part of the existing building 10 where reinforcement is required. Reinforcement can be performed. As a result, it is possible to easily and inexpensively reinforce the intermediate layer portion of the existing building 10.

[10] Tenth Embodiment Next, the structure of a reinforced building 1J according to the tenth embodiment will be described with reference to FIG. The reinforced building 1J is different from the reinforced building 1I according to the ninth embodiment in the point of the reinforcing structure 20 (particularly, the point of the connecting member 24). Specifically, the connection member 24 according to the tenth embodiment extends so as to surround the reinforcing bars that constitute the reinforcing column portion 21. Both ends of the connecting member 24 are connected to the reinforcing bar R2 (at least one of the main reinforcing bar R2a and the shear reinforcing bar R2b) constituting the column part 11 by welding. The reinforcing structure 20 according to the tenth embodiment can also be constructed in the same manner as in the ninth embodiment, and has the same effects as those in the ninth embodiment.

[11] Eleventh Embodiment Next, the structure of a reinforced building 1K according to an eleventh embodiment will be described with reference to FIG. The reinforced building 1K is different from the reinforced building 1A according to the first embodiment in the point of the reinforcing structure 20 (particularly, the point of the connecting member 24). Below, it demonstrates centering around difference with the reinforced building 1A which concerns on 1st Embodiment, and the overlapping description is abbreviate | omitted.

  The connection member 24 according to the eleventh embodiment includes a main portion 24a, one end portion 24b, and the other end portion 24c. The main part 24a, the one end part 24b, and the other end part 24c are all bar-shaped steel materials (bars). The main portion 24 a extends in a direction orthogonal to the surface of the beam portion 12.

  The one end 24b is provided integrally with the main portion 24a on one end side of the main portion 24a. The one end 24b extends along the vertical direction, and is welded to the shear reinforcing bar R1b of the reinforcing bar R1 embedded in the beam part 12.

  The other end 24c is provided integrally with the main portion 24a on the other end side of the main portion 24a. The other end portion 24c is constituted by a pair of hooks branched vertically from the other end of the main portion 24a. The other end side and the other end portion 24 c of the main portion 24 a are located in the reinforcing beam portion 22. Therefore, the fixing property between the connecting member 24 and the concrete constituting the reinforcing beam portion 22 is enhanced by the other end portion 24c.

  Then, the method to construct the reinforcement structure 20 which concerns on 11th Embodiment with respect to the intermediate | middle layer part of the existing building 10 is demonstrated. First, a predetermined portion of the beam portion 12 located in the intermediate layer portion is wound with a concrete hammer or the like, and a plurality of turned portions 12a are formed in the beam portion 12 so that the reinforcing bar R1 of the beam portion 12 is exposed. Next, the one end portion 24b of the connection member 24 is welded to the shear reinforcement bar R1b of the reinforcing bar R1 exposed at these turned parts 12a. Thereby, the connection member 24 (one end part 24b) is connected to the reinforcing bar R1.

  Next, reinforcing bars are arranged on the outer wall surface of the existing building 10 and at positions corresponding to the column part 11, the beam part 12 and the intersection part 13. Next, a beam part formwork is configured so as to cover the reinforcing bars arranged in the beam part 12. As a result, the reinforcing bar is surrounded by the beam part formwork and the outer wall surface of the beam part 12. Next, concrete is placed in the beam form. At this time, the concrete is also filled into the turned portion 12a. In addition, after welding the one end part 24b of the connection member 24 to the reinforcing bar R1, you may be filled with the filler 17 in the turning part 12a. After the concrete is hardened to become a hardened concrete body, the reinforcing beam 22 is formed at a position corresponding to the beam 12 by removing the beam form.

  Below, similarly to 1st Embodiment, the reinforcement pillar part 21, the reinforcement beam part 22, and the reinforcement intersection part 23 are formed in order toward the upper side from the lower side of the existing building 10. FIG. Thereby, the reinforced structure 20 is provided in the existing building 10, and the reinforced building 1K is completed.

  The eleventh embodiment as described above has the same effects as the ninth embodiment.

  In addition, when connecting the pillar part 11 and the reinforcement pillar part 21, you may use the connection member 24 similar to 11th Embodiment. Specifically, the one end portion 24b extends along the horizontal direction, and may be welded to the shear reinforcing bar R2b of the reinforcing bar R2 embedded in the column part 11.

[12] Other Embodiments Although the embodiment according to the present disclosure has been described in detail above, various modifications may be made to the above embodiment within the scope of the gist of the present invention. For example, as illustrated in FIGS. 18 and 19, the reinforced building 1 </ b> L includes the lower layer portion 10 a and the lower layer portion 10 a in which the reinforcing structures 20 according to the first to seventh and ninth to eleventh embodiments described above. It may be applied to the existing building 10 provided with the upper layer part 10b set back to the inner side. In this case, since the construction for penetrating the roof slab of the lower layer portion 10a and the construction of the lower layer portion 10a in the room are not required, the reinforcing structure 20 can be constructed while allowing living in the existing building 10.

  When the reinforcing structure 20 is provided to the existing building 10 including the set-up upper layer portion 10b, the reinforcing structure 20 includes the auxiliary beam portion 28 and the auxiliary intersection portion 29 as illustrated in FIGS. 18 and 19. May be further provided. In this case, the reinforcing structure 20 excluding the auxiliary beam portion 28 and the auxiliary intersection portion 29 is provided in the upper layer portion 10b. On the other hand, the auxiliary beam part 28 and the auxiliary intersection part 29 are arrange | positioned on the roof slab of the lower layer part 10a. The auxiliary intersection 29 is located between the lowermost reinforcing column 21 and the roof slab, and the auxiliary beam 28 is located between the auxiliary intersection 29 and substantially parallel to the reinforcement beam 22. It extends to. The auxiliary beam portion 28 is made of, for example, reinforced concrete. The auxiliary intersection 29 is made of, for example, a mortar hardened body in which reinforcing bars are embedded. The cured mortar is formed by curing polymer cement mortar.

  The auxiliary beam portion 28 and the auxiliary intersection portion 29 have a flat shape whose height in the vertical direction is smaller than the thickness in the direction perpendicular to the surface of the beam portion 12. The thickness (depth) of the auxiliary beam portion 28 and the auxiliary intersection portion 29 may be, for example, about 600 mm to 1200 mm. The height of the auxiliary beam portion 28 and the auxiliary intersection portion 29 may be about 300 mm to 400 mm. When the auxiliary beam portion 28 and the auxiliary intersection portion 29 have such a flat shape, the height is relatively low, so that people and the like can easily enter and exit the roof slab of the lower layer portion 10a.

  In each of the above embodiments, the reinforcing structure 20 is provided so as to be in contact with the outer surface of the existing building 10. However, the reinforcing structure 20 is provided in the existing building 10 in a state of being separated from the outer surface of the existing building 10. It may be. In this case, the reinforcing structure 20 further includes a reinforcing beam portion and a reinforcing slab that connect the reinforcing structure 20 and the outer surface of the existing building 10.

  The reinforcing structure 20 may be provided not only on the front part of the existing building 10 but also on at least one of the front part, the side part, and the back part.

  In each of the embodiments described above, the reinforcing structure 20 (the reinforcing column part 21, the reinforcing beam part 22, and the reinforcing intersection part 23) is provided on the outer surface of the existing building 10, but the middle street (existing You may provide the reinforcement pillar part 21, the reinforcement beam part 22, and the reinforcement intersection part 23 on the surface of the pillar part 11, the beam part 12, and the intersection part 13 which are arrange | positioned in the inside of the building 10, respectively.

  Also in the first to sixth and ninth to eleventh embodiments, the column part 11 or the beam part 12 of the existing building 10 may be made of reinforced steel concrete as in the seventh and eighth embodiments. .

  1A to 1L: Reinforced building, 10: Existing building, 10a: Lower layer part, 10b ... Upper layer part, 11 ... Column part, 11a ... Bent part, 12 ... Beam part, 12a ... Bent part, 13 ... Intersection part, DESCRIPTION OF SYMBOLS 20 ... Reinforcement structure, 21 ... Reinforcement pillar part, 22 ... Reinforcement beam part, 23 ... Reinforcement crossing part, 24 ... Connection member, 24b ... One end part (hook part), 24c ... Other end part (bending part), 24d ... Joint part, 24e ... Connection part, 25 ... Auxiliary column part, 26 ... Column receiving jig, 27 ... Fastener, 28 ... Auxiliary beam part, 29 ... Auxiliary crossing part, R1-R3 ... Rebar, R2a ... Main reinforcement (column part) Main bars), R3a ... main bars (reinforcing column main bars), R3c ... connecting parts, R3d ... connecting parts, SF1, SF2 ... steel frames.

Claims (18)

A column part including a reinforcing bar inside, a beam part including a reinforcing bar inside, a position where the column part and the beam part intersect with each other and connected to an end part of the column part and an end part of the beam part, respectively A reinforcing structure that reinforces an existing building with an intersection,
Reinforcing pillars that are disposed along the pillars and include a hardened concrete body in which reinforcing bars are embedded;
Reinforced beam portion including a hardened concrete body arranged along the beam portion and embedded with reinforcing bars,
A reinforcing intersection including a polymer cement mortar hardened body, which is disposed at a position corresponding to the intersection, and is connected to an end of the reinforcing pillar and an end of the reinforcing beam, respectively, and a reinforcing bar embedded therein;
A connecting member,
The connecting member is inserted into both the column part and the reinforcing column part, and one end part is connected to the reinforcing bar in the column part, or the beam part and the reinforcing beam part A reinforcing structure which is inserted into both of these and has one end connected to the reinforcing bar in the beam portion. The connecting member is a rebar inserted through both the beam part and the reinforcing beam part,
The one end portion of the connection member is bent in a hook shape and connected in a state of being hooked on the reinforcing bar in the beam portion,
The reinforcing structure according to claim 1, wherein the other end side of the connection member extends in a direction orthogonal to the surface of the beam portion.   The reinforcing structure according to claim 2, wherein the other end of the connection member is bent into a predetermined shape.   2. The reinforcing structure according to claim 1, wherein the one end portion of the connection member is welded to the reinforcing bar in the column portion, or is welded to the reinforcing bar in the beam portion. The connection fixing length La of the portion in the reinforcing beam portion of the member, the parameters S, f _{t, d b,} the F _c respectively S: a correction factor must fixing the length of said connecting member, said connecting member 1.25 when the other end of the connecting member is linear, and 0.70 when the other end of the connecting member has a bent portion bent into a predetermined shape.
f _t : Short-term allowable tensile stress degree of the connection member d _b : Numerical value of the diameter by the name of the connection member F _c : Formula 1 is satisfied when defined as the design standard strength of concrete The reinforcing structure according to one item.

The connection member is a reinforcing bar inserted through both the pillar part and the reinforcing pillar part,
The one end portion of the connection member is bent in a hook shape and connected in a state of being hooked on the reinforcing bar in the column portion,
The reinforcing structure according to claim 1, wherein the other end side of the connecting member is suspended in the reinforcing column part. The rebar in the column has a column main reinforcement extending along the extending direction of the column,
The reinforcing bar in the reinforcing column part has a reinforcing column part main bar extending along the extending direction of the reinforcing column part,
The connecting member is
Reinforcing bars inserted inside both of the column and the reinforcing column,
A joint portion connected by a lap joint with the pillar main reinforcement and embedded in the pillar portion;
The reinforcing structure according to claim 1, comprising a connecting portion that connects an upper end portion of the reinforcing column main reinforcing bar and the joint portion. An auxiliary column portion provided on the upper end side of the reinforcing column portion and embedded in the connecting portion;
The reinforcing structure according to claim 7, wherein the auxiliary pillar portion has a portion whose thickness in the first direction orthogonal to the surface of the pillar portion decreases as it goes upward.   The reinforcing structure according to claim 8, wherein a gradient defined by a height of the auxiliary column part in the first direction with respect to a length of the auxiliary column part in a vertical direction is 1/3 or less.   The connection member is a wire rope disposed inside both of the column portion and the reinforcement column portion in a state of being hooked on the reinforcing bar of the column portion and suspended in the reinforcement column portion. The reinforcing structure according to 1. A column part including a reinforcing bar inside, a beam part including a reinforcing bar inside, a position where the column part and the beam part intersect with each other and connected to an end part of the column part and an end part of the beam part, respectively A reinforcing structure that reinforces an existing building with an intersection,
Reinforcing pillars that are disposed along the pillars and include a hardened concrete body in which reinforcing bars are embedded;
Reinforced beam portion including a hardened concrete body arranged along the beam portion and embedded with reinforcing bars,
A reinforcing intersection including a polymer cement mortar hardened body, which is disposed at a position corresponding to the intersection, and is connected to an end of the reinforcing pillar and an end of the reinforcing beam, respectively, and a reinforcing bar embedded therein;
A connecting member,
The connecting member is inserted through both the column part and the reinforcing column part so as to penetrate the column part, or the beam part and the reinforcement beam so as to penetrate the beam part. Reinforcing structure that is inserted through both inside and outside the part. A column part including a reinforcing bar and a steel frame, a beam part including a reinforcing bar and a steel frame, and a position where the column part and the beam part intersect, and an end of the column part and an end of the beam part Reinforcing structures that reinforce existing buildings with each connected intersection,
Reinforcing pillars that are disposed along the pillars and include a hardened concrete body in which reinforcing bars are embedded;
Reinforced beam portion including a hardened concrete body arranged along the beam portion and embedded with reinforcing bars,
A reinforcing intersection including a polymer cement mortar hardened body, which is disposed at a position corresponding to the intersection, and is connected to an end of the reinforcing pillar and an end of the reinforcing beam, respectively, and a reinforcing bar embedded therein;
A connecting member,
The connecting member is inserted into both the column part and the reinforcing column part, and one end part is connected to the steel frame in the column part, or extends between the beam part and the reinforcing beam part. A reinforcing structure that is inserted into both of these and has one end connected to the steel frame in the beam. The connecting member is a reinforcing bar that is inserted into both of the beam part and the reinforcing beam part and is connected to the steel frame in the column part at one end.
The reinforcing structure according to claim 12, wherein the other end of the connection member is bent into a predetermined shape. The connecting member is a rebar that is inserted into both the beam part and the reinforcing beam part and is connected to the steel frame in the column part at one end part,
The connection fixing length La of the portion in the reinforcing beam portion of the member, the parameters S, f _{t, d b,} the F _c respectively S: a correction factor must fixing the length of said connecting member, said connecting member 1.25 when the other end of the connecting member is linear, and 0.70 when the other end of the connecting member has a bent portion bent into a predetermined shape.
f _t: Short-term allowable tensile stress of d b of the connecting _member: said connecting member nickname figures by diameter F c _of: if you define the design strength of the concrete satisfy Equation 2, according to claim 12 or 13 Reinforced structure.

A column receiving jig for supporting the reinforcing column portion at the lower end side of the reinforcing column portion;
The reinforcing structure according to any one of claims 12 to 14, wherein the pillar receiving jig is attached to the pillar part through a fastener having one end part connected to the steel frame in the pillar part. . An auxiliary beam portion extending substantially parallel to the reinforcing beam portion;
The existing building includes a lower layer and an upper layer set back on the inner side of the lower layer,
The reinforcing column part, the reinforcing beam part, and the reinforcing intersection part are provided in the upper layer part,
The auxiliary beam portion is disposed on the roof slab of the lower layer portion, and has a flat shape in which a height in a vertical direction is smaller than a thickness in a direction perpendicular to the surface of the beam portion. The reinforcing structure according to any one of 15. A column part, a beam part including a reinforcing bar inside, and an intersection part located at a position where the column part and the beam part intersect with each other and connected to an end part of the pillar part and an end part of the beam part, respectively. A method of manufacturing a reinforcing structure for reinforcing an existing building,
A first step of rolling a part of the beam so that the rebar of the beam is exposed;
A second step of connecting one end of a connecting reinforcing bar to the reinforcing bar of the beam portion exposed in the first step;
A third step of arranging reinforcing bars at positions corresponding to the column part, the beam part, and the intersection part,
After the third step, a fourth step of providing a first mold so as to cover the reinforcing bars arranged in the pillar portion, and placing concrete in the first mold,
After the third step, a second mold is provided so as to cover the reinforcing bars and the connecting reinforcing bars arranged in the beam portion, and the portion of the beam portion beaten in the first step is filled. While a fifth step of placing concrete in the second mold,
After the third step, a third mold is provided so as to cover the reinforcing bars disposed at the intersecting portion, and a sixth step of filling the third mold with polymer cement mortar is included. The manufacturing method of a reinforced structure. A column part, a beam part including a reinforcing bar inside, and an intersection part located at a position where the column part and the beam part intersect with each other and connected to an end part of the pillar part and an end part of the beam part, respectively. A method of manufacturing a reinforcing structure for reinforcing an existing building,
A first step of rolling a part of the beam so that the rebar of the beam is exposed;
A second step of connecting one end of a connecting reinforcing bar to the reinforcing bar of the beam portion exposed in the first step;
A third step of filling a portion of the beam portion beaten in the first step with a filler;
A fourth step of arranging reinforcing bars at positions corresponding to the column part, the beam part, and the intersection part,
After the fourth step, a fifth step of providing a first mold so as to cover the reinforcing bars arranged in the pillar portion, and placing concrete in the first mold,
After the fourth step, a sixth step of providing a second mold so as to cover the reinforcing bars and the connecting reinforcing bars arranged in the beam portion, and placing concrete in the second mold When,
And a seventh step of providing a third mold so as to cover the reinforcing bars disposed at the intersecting portion after the fourth step and filling the third mold with polymer cement mortar. The manufacturing method of a reinforced structure.

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