WO1999039064A1

WO1999039064A1 - Viscoelastic brace

Info

Publication number: WO1999039064A1
Application number: PCT/JP1999/000367
Authority: WO
Inventors: Toru Takeuchi; Hiroshi Nakamura; Mamoru Iwata; Atsushi Watanabe
Original assignee: Nippon Steel Corporation
Priority date: 1998-01-28
Filing date: 1999-01-28
Publication date: 1999-08-05
Also published as: CN1128282C; HK1027143A1; CN1255952A

Abstract

A viscoelastic brace, wherein first and second core members comprising shape steel, square steel tubes or circular steel tubes are disposed in series via a pipe expanding and contracting clearance, one set of channel steel or semicircular steel sheets and viscoelastic sheets disposed in opposite positions so as to enclose the first core member therewith being laminated in a single layer on and stuck to a side surface of the first core member, end portions of the channel steel or semicircular steel sheets being fixed to the second core member, whereby the first and second core members are viscoelastically joined to each other via the channel steel or semicircular steel sheets and viscoelastic sheets. This viscoelastic brace enables, in a structure which is higher than it is wide, such as a multistoried building, the horizontal deformation due to an earthquake and wind and a shearing force to be reduced, and vibration to be speedily damped.

Description

Description Viscoelastic brace Technical field

The present invention relates to a viscoelastic brace that gives a damping effect to external forces such as seismic force and wind in buildings and other structures. Conventional technology

As shown in FIGS. 7 (a) and 7 (b), a conventional vibration damping device is a vibration damping device 102 (Japanese building) in which a steel plate 103 and a viscoelastic body 104 are adhered to the end of a brace 101 in a laminated manner. As shown in the summary of the conference, Kyushu, October 1989, pp. 629-630, and Fig. 8 (a), (b) and (c), the steel outer bracing 111 Vibration suppressor 115 for buildings having a viscoelastic material layer 113 interposed between the peripheral surface and the outer peripheral surface of steel inner reinforcing member 112 (FIG. 8 (b)), or disclosed in Japanese Patent No. 2583801. As described above, a cement-based hardening material 114 is fixed in a pipe, which is a steel outer bracing material 111, and an inner peripheral surface of the cement-based hardening material 114 and an outer peripheral surface of the steel inner bracing material 112. There is a vibration suppression device 116 (FIG. 8 (c)) for a building in which a viscous material layer 113 is interposed and fixed between and.

In buildings that are taller than the width of the building, such as high-rise buildings, vibrations due to seismic force or wind may have a significant effect on the structure. In response to this vibration, a conventional vibration damping device is attached to the end of the brace as described above, or the gap between the inner peripheral surface of the steel outer bracing member and the outer peripheral surface of the steel inner bracing member. In the vibration suppression device in which the viscoelastic material layer is interposed, the portion that absorbs the vibration energy is limited to the end of the brace, or only one viscoelastic material layer can be inserted. The total area of the viscoelastic material that can be applied was limited, and it was difficult to increase the energy absorption capacity of the brace. When the conventional method shown in Figs. 7 (a) and 7 (b) is extended to the entire brace length to increase the total area of the viscoelastic body, the flat steel sheet laminated between the viscoelastic bodies is compressed. There were problems such as the possibility of buckling due to force and the peeling of the outermost viscoelastic material layer and the flat steel plate outward.

As a structure for solving the above-mentioned problem, a structure in which a viscoelastic body is fixed between an outer cylinder and an inner cylinder has been proposed as disclosed in Japanese Patent Application Laid-Open No. 9-113369. However, in order to realize this structure, a liquid viscoelastic body must be poured between them and fixed, and solid objects such as viscoelastic sheets cannot be fixed. However, there is a problem that only one layer of the viscoelastic body can be formed, and it is not possible to improve the vibration energy absorbing ability by forming a plurality of layers. In addition, as disclosed in Japanese Patent Publication No. Hei 11-187271, a structure in which a viscoelastic body is sandwiched between pipes having a closed cross section and adhered between double pipes to increase resistance to an out-of-plane force is provided. Although it has been proposed, this involves fixing a viscoelastic body to the surface of the inner tube and sandwiching the viscoelastic body with the outer tube to fix it. I can't do that. In addition, the viscoelastic body is sandwiched between the separated outer pipe and inner pipe.However, the separated outer pipes are in contact with each other, and the outer pipe, inner pipe, and viscoelastic body must be sufficiently compressed. Can not. In order for the outer tubes to be sufficiently crimped, the separated outer tubes must be arranged at regular intervals. Therefore, according to the prior art, it is impossible to sufficiently adhere and adhere. Disclosure of the invention

The present invention has been made to solve the above problems, and It is configured as described.

(1) A first core and a second core made of a shaped steel, a square steel pipe, or a circular steel pipe are arranged in series with a gap for expansion and contraction, and face the side of the first core so as to surround the first core. A single layer of the arranged channel steel or semicircular steel sheet and the viscoelastic sheet are each laminated and adhered in a single layer, and the end of the channel steel or semicircular steel sheet is fixed to the second core material. The first core member and the second core member constitute a viscoelastic brace viscoelastically connected to the channel steel or the semicircular steel plate via the viscoelastic sheet.

(2) The channel steel or semi-circular steel sheet and the viscoelastic sheet which are arranged oppositely consist of a plurality of sets, which are laminated and adhered alternately, respectively, and the ends of the channel steel or semi-circular steel sheet alternately form The viscoelastic brace according to the above (1), wherein the viscoelastic brace is fixed to the two-core material and the vicinity of the first core material end.

(3) A lid for connecting the side surface of one of the outermost channel steel or semi-circular steel plate disposed opposite to the other and the side surface of the other outermost channel steel or semi-circular steel plate disposed opposite to each other. The viscoelastic brace according to the above (1) or (2), which is fixed, is constituted.

(4) The viscoelastic brace according to any one of (1) to (3), wherein the channel steel or the semi-circular steel plate opposingly arranged is installed at a predetermined interval from each other.

(5) The section steel forming the first core member and the second core member is any one of an H-section steel, an I-section steel, an H-section assembly, and an I-section assembly; A pair of the channel steel and the viscoelastic sheet which are opposed to each other are laminated and adhered in a single layer, and the end of the channel steel which is opposed to the web side is fixed to the second core material. The viscoelastic brace according to any one of (1) to (4), wherein

(6) A plurality of sets of channel steel and viscoelastic sheet that are arranged opposite to the side of the web are laminated and adhered alternately, and the ends of the channel steel are alternately The viscoelastic brace according to the above (5), characterized in that the viscoelastic brace is fixed to an end portion of the second core member or the first core member.

(7) The first core and the second core made of the H-section steel, the I-section steel, the H-section assembly, or the I-section assembly are arranged in series with a gap for expansion and contraction. In this method, a pair of channel steel and viscoelastic sheet which are arranged opposite to each other are laminated and adhered in a single layer, and the end of the channel steel is fixed to the second core material, and the first core material and the A viscoelastic brace, wherein the two core members are viscoelastically connected to the channel steel via the viscoelastic sheet.

(8) A plurality of sets of the channel steel and the viscoelastic sheet arranged opposite to the side of the web are laminated and adhered alternately, and the ends of the channel steel are alternately formed at the end of the second core member or the first core member. The viscoelastic brace according to the above (7), wherein the viscoelastic brace is fixed near the portion.

(9) At least one of the one or more sets of the channel steel or semicircular steel plate and the viscoelastic sheet which are arranged opposite to each other is arranged on only one side. The viscoelastic brace according to any one of (1) to (8). BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a diagram showing an application example of a viscoelastic brace in the present invention, wherein (a) is one example, (b) is another example, and (c) is another example. 1A and 1B are diagrams showing a viscoelastic brace according to a first embodiment of the present invention, in which FIG. 1A is a longitudinal sectional view, and FIG. 1B is a sectional view taken along line A—A in FIG. (C) is another example of A-A cross section of (a) (1st core material 3 and 2nd core material 4 are square steel pipes), and (d) is A— of (a) A cross section (1st core 3 and 2nd core 4 are circles) This is another example.

FIGS. 3A and 3B are diagrams showing a second embodiment of the viscoelastic brace according to the present invention. FIG. 3A is a longitudinal sectional view, and FIG. 3B is a sectional view taken along the line BB in FIG. (C) is another example of the cross section B-B of (a) (first core 3 and second core 4 are square steel pipes), (d) is (a) ) Is another example of a cross-sectional view taken along line B-B (the first core member 3 and the second core member 4 are circular steel pipes).

FIGS. 4A and 4B show a third embodiment of the viscoelastic brace according to the present invention, wherein FIG. 4A is a longitudinal sectional view, and FIG. 4B is a sectional view taken along the line D-D of FIG. Core material 4 is an example of H-section steel).

FIG. 5 (a) is a cross-sectional view taken along line C-C of FIG. 4 (a), and FIG. 5 (b) is a cross-sectional view of FIG.

FIG. 6 shows a cross-sectional view of another example of a viscoelastic brace according to the present invention. FIG. 7 shows an example of a conventional vibration suppressing device, where (a) is a conceptual diagram of device installation and (b) is a control diagram. It is a conceptual diagram and a sectional view of a vibration device.

Fig. 8 is a diagram showing another example of a conventional vibration damping device. (A) is a conceptual diagram of the device installation, and (b) and (c) are cross-sectional views of two different examples of the vibration damping device of a building. is there.

FIG. 9 is a diagram showing a comparison of the magnitude of the secondary radius of the cross section in Example 1. (a) is a channel steel, (b) is a semi-circular steel plate, and (c) is a cross sectional secondary radius of a flat steel. FIG.

FIG. 10 is a diagram showing a comparison of the magnitude of the secondary radius of the cross section in Example 2. (a) is a channel steel, (b) is a semi-circular steel plate, and (c) is a cross sectional secondary radius of a flat steel. FIG. BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a channel steel or semicircular steel plate and a viscoelastic sheet, which surround the first core and are opposed to each other, are laminated and adhered to the side surface of the first core in a single layer or a plurality of layers. The end portions of the channel steel or semicircular steel plate are alternately fixed to the end portion of the first core material and the second core material, and the first core material and the second core material are provided with a gap for expansion and contraction to form the groove. By connecting the section steel or the semi-circular steel plate and the viscoelastic sheet, the vibration energy is input to the viscoelastic brace, and the viscoelastic sheet is subjected to shear deformation. Absorbs and attenuates vibration energy.

At this time, all of the channel steel or semicircular steel plate on which the viscoelastic sheet is laminated has a large secondary radius in cross section, so that it does not buckle even during compression, and stable stress transmission is achieved. You. In addition, the entire laminated structure is enclosed and restrained by fixing a lid to a side surface of the outermost channel steel or the semi-circular steel plate which is arranged opposite to each other, and is constrained. And the viscoelastic sheet does not separate.

As a result, horizontal deformation and shearing force of a structure such as a high-rise building with horizontal vibration can be reduced, and the vibration can be rapidly damped.

The viscoelastic brace of the present invention has such a configuration, and solves the problem that in the case of the conventional technique, the components of the vibration damping device could buckle under compressive force. By fixing the lid to the side of the outermost grooved steel or semi-circular steel plate and connecting them together, the problem of peeling of the viscoelastic sheet and the steel plate is solved, and the number is dramatically increased. This is a novel invention in that a high-performance viscoelastic brace is made possible by interposing a viscoelastic sheet having a cross section of the above. Example

Next, the present invention will be described in detail based on examples. Example 1

First Embodiment A viscoelastic brace according to a first embodiment of the present invention will be described with reference to FIGS.

FIGS. 1 (a), (b) and (c) show examples in which the viscoelastic brace of the present invention is applied to, for example, a brace of a high-rise building.

The viscoelastic brace 2 shown in FIGS. 1 (a), (b) and (c) has the first core 3 on the side of the H-shaped first core 3 shown in FIGS. 2 (a) and (b). The first viscoelastic body sheet 9 and the first channel steel 6 that are arranged and opposed to each other are laminated and adhered alternately, and the end of the first channel steel 6 is attached to the second core 4 having an H-shaped cross section. The first core 3 and the second core 4 are fixed to each other with the channel steel fixing material 13 interposed, and the first core connecting hole 15 and the second core 15 for fixing to the building frame 1 shown in Fig. 1 are installed in the first core 3 and the second core 4. A hole 16 for connecting the core material is made, and a lid Π is fixed on the side surface of the first channel steel 6 which is arranged oppositely.The first core material 3 and the second core material 4 are interposed between the first core material 3 and the second core material 4 with the first viscoelastic body They are connected by a sheet 9 and a first channel steel 6.

The cross-sectional shape of the first core material 3 and the second core material 4 may be a square steel pipe or a circular steel pipe as shown in Figs. 2 (c) and 2 (d). The first semicircular steel plate 27 is used instead of the first channel steel 6.

The expansion / contraction gap 30 is interposed between the first core member 3 and the second core member 4, so that the first core member 3, the second core member 4, and the first groove with respect to the vibration energy input to the viscoelastic brace 2. The shape steel 6 is not deformed, and only the first viscoelastic sheet 9 can be sheared. As shown in Figs. 9 (a), (b) and (c), when the thickness t and width B of the first channel steel 6, the first semicircular steel plate 27 and the first flat steel 31 are the same, respectively. The second moments I,, I ₂ are the cross section of the first flat steel 31, the second moment I 3, the cross section around the neutral axis X _ X of the first channel steel 6 and the first semicircular steel plate 27. About 150 to 160 times that of the first channel steel 6 and the first half The cross-sectional secondary radii i 1, and i ₂ of the circular steel plate 27 are 9 to 10 times larger than the cross-sectional secondary radius i of the first flat steel 31, and buckling does not occur when a compressive axial force is applied. Further, the lid 17 is opposed to the first channel steel 6 and the side surfaces of the first channel steel 6 are fixed to each other, thereby restraining the first channel steel 6, the first viscoelastic sheet 9 and the first core member 3, and Separation can be prevented, and the stress can be transmitted stably.

As shown in Fig. 2, the viscoelastic brace 2 shown in Fig. 1 is fixed to the building frame 1 by bolts or the like using the first core material connection hole 15 and the second core material connection hole 16. Accordingly, the vibration energy input to the framework 1 of the building acts so as to be absorbed by the shear deformation of the first viscoelastic sheet 9.

For example, if the adhesive length of the viscoelastic sheet 9 adhered to the side surface of the first core material 3 shown in FIG. 2 is the entire length of the core material excluding the connecting portion, the viscoelastic sheet 9 The shear cross-sectional area of the conventional technology is five times that of the conventional technology shown in Fig. 8 with the vibration control device 115 (116) having one layer of viscoelastic sheet at the end, and the vibration energy absorption capacity is also five times. Becomes Thereby, the vibration of the framework 1 of the building is quickly attenuated, and the viscoelastic braces 2 can exhibit an excellent vibration damping effect.

Example 2

Second Embodiment A viscoelastic brace according to a second embodiment of the present invention will be described with reference to FIG.

The viscoelastic brace 2 is composed of a first viscoelastic sheet that surrounds the first core member 3 and is arranged on the side surface of the first core member 3 having an H-shaped cross section as shown in FIGS. 3 (a) and 3 (b). 9, 1st channel steel 6, 2nd viscoelastic sheet 10, 2nd channel steel 7, 3rd viscoelastic sheet 11 and 3rd channel steel 8 are laminated and adhered alternately. The end of the channel steel 6 is interposed with the first channel steel fixing material 13, and the end of the third channel steel 8 is interposed with the third channel steel fixing material 14, thereby forming an H-shaped cross section. The second core 4 is fixed to the first core 3 having an H-shaped cross section with the second channel steel fixing member 12 interposed therebetween. The core material 4 is composed of the first viscoelastic sheet 9, the first channel steel 6, the second viscoelastic sheet 10, the second channel steel 7, the third viscoelastic sheet 11 and the third viscoelastic sheet 11. The viscoelastic brace 2 of the first embodiment shown in FIG. 2 is different from the viscoelastic brace 2 shown in FIG. 2 in that the lid 17 is fixed to the side surface of the third channel steel 8 connected by the channel steel 8 and arranged to face each other. That is, the viscoelastic brace 2 shown in FIG. 2 has a single-layer structure of the pair of the first viscoelastic sheet 9 and the first channel steel 6, whereas the viscoelastic brace 2 shown in FIG. Are the first viscoelastic sheet 9 and the first channel steel 6, the second viscoelastic sheet 10 and the second channel steel 7, and the third viscoelastic sheet 11 and the third channel steel 8 It has a three-layer structure.

Such a structure may be provided not only in three layers but also in an additional number of layers by combining a viscoelastic sheet and a channel steel.

The cross-sectional shapes of the first core material 3 and the second core material 4 may be rectangular steel pipes or circular steel pipes as shown in FIGS. 3 (c) and 3 (d). A first semicircular steel plate 27, a second semicircular steel plate 28 and a third semicircular steel plate 29 are used instead of the first channel steel 6, the second channel steel 7 and the third channel steel 8.

At this time, as shown in Figs. 10 (a), (b) and (c), the thickness t and width B of the first channel steel 6, the first semicircular steel plate 27 and the first flat steel 31 are the same, respectively. when the neutral axis X 1 of the first Mizokatachiko 6 first semicircular steel plate 27 - section secondary Mome around XI down bets I,, 1 ₂ Chikaraku, secondary section 2 of the first flat bar 31 Mome since the approximately 150-fold to 160-fold down sheet 1 _3, section secondary radius i of the first channel steel 6 and the first semicircular steel plate 27,, i ₂ is a cross-sectional secondary radius i of the first flat bar 31 9 to 10 times that of _{3. No} buckling occurs when a compressive axial force is applied.

Similarly, the second channel steel 7, the third channel steel 8, the second circular steel plate 28 and the third The cross section secondary radius of the circular steel plate 29 is larger than that of the second flat bar 32 and the third flat bar 33, so that buckling does not occur against the compressive force.

Further, since the entire laminated structure is constrained by the outermost steel sheet 8 or 29 and the lid 17, separation of the viscoelastic sheet and the channel steel does not occur, and the stress can be transmitted stably.

In the second embodiment, the viscoelastic sheets adhered to the side surfaces of the first core material 3 are laminated and adhered in three layers, and the same viscoelastic bodies as those of the first embodiment laminated and adhered in a single layer. The vibration energy-absorbing capacity is three times as large as the sheet thickness and volume. This makes it possible to form a large-capacity viscoelastic brace 2 that can absorb the vibration energy input to the framework 1 of the building by the shear deformation of the viscoelastic sheet. It can be obtained more effectively than the form.

Example 3

Third Embodiment A viscoelastic brace according to a third embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 4 (a), (b) and 5 (a), the viscoelastic brace 2 faces the web side surface of the first core material 3 having an H-shaped cross section, with the web of the first core material 3 interposed therebetween. The arranged first internal viscoelastic sheet 21, the first internal channel steel 19, the second internal viscoelastic sheet 22, and the second internal channel steel 20 are alternately laminated and adhered, and the first internal channel The end of the steel 19 is fixedly attached to the second core 4 having an H-shaped cross section with a first internal channel steel fixing member 23 interposed therebetween, and the end of the second internal channel steel 20 is formed into an H-shaped cross section. The first core member 3 and the second core member 4 are fixed to the first core member 3 with the second inner channel steel fixing member 24 interposed therebetween, and the first viscoelastic sheet 9, the first channel steel 6, and the second 2 Viscoelastic sheet 10, 2nd channel steel 7, 3rd viscoelastic sheet 11 and 3rd channel steel 8, 1st internal viscoelastic sheet 21, 1st internal Channel steel 19, 2nd internal viscoelastic sheet 22 and The point of connection by the second internal channel steel 20 is different from the viscoelastic brace 2 of Example 2 shown in Figs. 3 (a) and (b). That is, the viscoelastic brace 2 in the third embodiment shown in FIGS. 4 (a), (b) and 5 (a) is the same as the viscoelastic brace 2 in the second embodiment shown in FIGS. 3 (a) and (b). 1 A core material 3 has a laminated structure of viscoelastic sheet and channel steel added to both sides of the web. In the present invention, as shown in FIG. 5 (b), at least one set of one or more sets of channel steel or semicircular steel plate and viscoelastic sheet which are arranged opposite to each other is provided on one side. Only the channel steel or semi-circular steel plate and the viscoelastic sheet may be provided on only one side.

In addition to such a laminated structure, a viscoelastic sheet and a channel steel may be combined to provide additional layers.

In the third embodiment, compared with the second embodiment, four layers of viscoelastic sheets laminated and adhered to the side surface of the first core material 3 are added, and the added four layers of the viscoelastic body are added. The ability to absorb vibration energy increases according to the shear cross-sectional area of the sheet.

Further, as shown in FIG. 6, the viscoelastic brace according to the present invention has a first core member made of an H-shaped steel, an I-shaped steel, an H-shaped assembled material, or an I-shaped assembled material, as shown in FIG. The core material is arranged in series with a gap for expansion and contraction, and a pair of channel steel and a viscoelastic sheet which are opposed to each other are laminated and adhered in a single layer on the web side surface of the first core material. The structure of a viscoelastic bracing in which an end of a section steel is fixed to the second core, and the first core and the second core are viscoelastically connected to the channel steel via the viscoelastic sheet. Also, instead of the single-layer structure of the viscoelastic brace channel and viscoelastic sheet, the channel steel and viscoelastic sheet opposing the web side consist of a plurality of sets. Each of the end portions of the channel steel is alternately laminated and adhered, and the end of the channel steel is alternately the second core material or the first core. A viscoelastic brace may be configured to be fixed near the end of the bar, and a pair of channel steel and a viscoelastic body that surround and surround the first core as described above. The viscoelastic brace, which has a simpler structure without sticking the sheet in a single layer or a plurality of layers, can sufficiently withstand use.

In this manner, a viscoelastic brace 2 having a larger capacity is formed by laminating and adhering the viscoelastic sheet and the channel steel to both sides of the web of the first core material 3 having the H-shaped cross section. can do.

Thereby, the vibration energy input to the framework 1 of the building can be further absorbed by the shear deformation of the viscoelastic sheet than in the second embodiment, and a high damping effect can be obtained. According to the present invention, the vibration of the framework 1 of the building is rapidly attenuated, and the viscoelastic brace 2 can exhibit an excellent vibration damping effect. Industrial applicability

As described above, according to the present invention, since all of the channel steel or circular steel plate on which the viscoelastic sheet is laminated have a large secondary radius in cross section, buckling does not occur even when compressed, and the steel is stable. A stress is transmitted, and a lid is fixedly attached to the side surface of the outermost channel steel or the circular steel plate which is disposed opposite to and connected to each other, whereby the entire laminated structure is surrounded and restrained, and the channel steel is restrained. Alternatively, since the circular steel plate and the viscoelastic sheet do not separate from each other, and further, since the channel steel or the circular steel plate is separated and opposed to each other, the viscoelastic sheet and the groove are not provided. It is possible to manufacture by shaping the shaped steel or the circular steel plate into a laminate, eliminating the need to pour a viscoelastic body (effectively manufacturing viscoelastic bodies that cannot be poured). , Which enables high-rise buildings In a structure having a high height than in the width of the building as object, and reduce the deformation and shear force in the horizontal direction by seismic and wind, you are the this damping vibrations quickly.

Claims

The scope of the claims

1. The first core and the second core made of shaped steel, square steel pipe or round steel pipe are arranged in series with a gap for expansion and contraction, and are arranged opposite to the side of the first core so as to surround the first core. The single set of grooved steel or semicircular steel plate and the viscoelastic sheet are laminated and adhered in a single layer, and the end of the grooved steel or semicircular steel plate is fixed to the second core material. A viscoelastic brace wherein the core and the second core are viscoelastically connected to the channel steel or the semicircular steel plate via the viscoelastic sheet.

2. A plurality of sets of channel steel or semi-circular steel sheet and viscoelastic sheet which are arranged opposite to each other are laminated and adhered alternately, and the ends of the channel steel or semi-circular steel sheet are alternately made of the second core material. 2. The viscoelastic brace according to claim 1, wherein the viscoelastic brace is fixed near an end of the first core material.

3. A lid for connecting the side of one of the outermost channel steel or semi-circular steel plate disposed opposite to the other and the side of the other outermost channel steel or semi-circular steel plate disposed opposite to each other is fixed. The viscoelastic brace according to claim 1 or 2, wherein:

4. The viscoelastic brace according to any one of claims 1 to 3, wherein the channel steel or the semi-circular steel plate arranged opposite to each other is installed at a predetermined interval from each other.

5. The section steel forming the first core member and the second core member is any of an H-section steel, an I-section steel, an H-section assembly, or an I-section assembly;

(1) A pair of channel steel and viscoelastic sheet which are opposed to each other are laminated and adhered in a single layer on the side surface of the core. Claim 1-characterized by being fixed to the core material

4. The viscoelastic brace according to any one of 4.

6. A plurality of sets of channel steel and visco-elastic sheet arranged opposite to the side surface of the groove are laminated and adhered alternately, and the ends of the channel steel are alternately provided with the second core material or the first core material. 6. The viscoelastic brace according to claim 5, wherein the viscoelastic brace is fixed near an end.

7. A first core and a second core made of an H-shaped steel, an I-shaped steel, an H-shaped assembly, or an I-shaped assembly are arranged in series with an expansion gap, and the web of the first core is formed. A pair of channel steel and a viscoelastic sheet which are arranged opposite to each other are laminated and adhered in a single layer on the side surface, and the end of the channel steel is fixed to the second core material, and the first core material and The viscous brace wherein the second core is viscoelastically connected to the channel steel via the viscoelastic sheet.

8. A plurality of sets of the channel steel and the viscous sheet arranged opposite to the side of the web are laminated and adhered alternately, and the ends of the channel steel are alternately provided with the second core material or the first core material. The viscoelastic brace according to claim 7, wherein the viscoelastic brace is fixed near an end.

9. At least one of the one or more sets of the channel steel or semicircular steel plate and the viscoelastic sheet that are arranged opposite to each other is arranged on only one side. Viscoelastic brace _{n according} to any one of Items 1 to 8