KR200186212Y1 - Trussed floor structure - Google Patents

Abstract

An object of the present invention is to provide a three-dimensional truss bottom structure that can reduce the thickness of the structural member by arranging the truss in both long and short sides, and can effectively use the cross-section of the member by introducing a prestress to the tension member. The three-dimensional truss bottom structure of the present invention is composed of the truss upper chord (2), the truss lower chord (3), the posts (20, 30) and the tension member (7). The truss top chord 2 is installed in a grid between four columns, and posts 20 and 30 are vertically installed below the intersection of the grids. The truss lower chord 3 is provided between the lower ends of the posts. The lower ends of the posts 20 and 30 are formed with through holes penetrating the posts and fixing holes 25 and 35. The fixed end 10 is installed at the portion where the truss top chord 2 and the column 1 meet, and the fixing end 10 is formed with hooks 12, 15, and 16 to wind the tension member 7 in one round. Can be fixed. If the tension member 7 is installed between the fixing brackets 12, 15 and 16 of the fixed end and the fixing holes 25 and 35 at the bottom of the post and is fixed by tension, the ends of the posts 20 and 30 try to rotate toward the column. Since the lower part of the post is restrained by the truss lower chord 3, the resultant is subjected to upward synthetic force, and the effect of introducing a kind of prestress can be obtained. When tension and fixing of the tension member (7) is completed, formwork such as deck plate (8) on the upper chord (2), reinforce the reinforcing bars or wire mesh, and then cast concrete.

Description

Three-dimensional truss floor structure

The present invention relates to a three-dimensional truss floor structure. More specifically, a truss upper chord is installed between the pillar and the pillar, a post is installed at the lower part of the grid-shaped intersection of the upper chord, a truss lower chord connecting the lower part of the post is installed and fixed at the corner of the pillar. It relates to a structure that can connect the lower end of the end and the post with a tension member, and then tension and settle so that the post exerts an upward force on the upper chord to reduce the load on the upper chord.

The truss structure used for the floor structure of the structure is usually a planar one-way truss. Therefore, it is common to arrange the main truss in one direction between the pillar and the auxiliary beam or the auxiliary truss in the perpendicular direction. Even if the lengths of the long and short sides are the same, if the truss is installed in both directions, the auxiliary beams should be arranged in a lattice because the details of the joint are complicated and the efficiency is reduced. This is the same context in which there is not much use of grid beams in reinforced concrete beams.

Therefore, the present invention has been developed a two-way truss system that can solve the above inconveniences and excellent construction and greatly reduce the construction cost and air.

It is an object of the present invention to provide a bidirectional truss structure having a simple construction with good joint details.

Another object of the present invention is to provide a structure having a high structural efficiency by using a bi-directional truss structure, by reducing the thickness of the structural member by introducing a prestress to the tension member.

Still another object of the present invention is to provide a structure that is advantageous in reducing the height of the floor by forming a truss using the tension member can fully utilize the space in the ceiling as a space for installation piping.

1 is a plan view of a truss image current.

2 is a plan view of the truss lower chord.

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a plan view of the deck plate is installed.

5 and 6 are detailed views of the plane and elevation of the portion 'A' of FIG.

7 is a modification of the fixed end of FIG.

8 is an elevation view of a fixed end attached to the bottom of the girder.

9 and 10 are detailed views of the plane and elevation of the portion 'B' of FIG.

11 and 12 are detailed views of the plane and elevation of the portion 'C' of FIG.

<Description of the code | symbol about the principal part of drawing>

1: pillar 2: truss phase present

3a, 3b, 3c: truss lower chord 4: girder

5: beam 6: auxiliary beam

7: tension member 8: deck plate

10: fixed end 11, 14: horizontal iron plate

12, 15, 16: Latch 13: Reinforcing plate

20, 30: post 21, 31: vertical member

22, 32: upper iron plate 23, 33: lower iron plate

24, 34: fixing plate 25, 35: fixing unit

This invention is demonstrated by drawing.

The three-dimensional truss floor structure of the present invention is a system that can be constructed in the truss structure using the truss upper chord (2), the truss lower chord (3), the posts (20, 30) and the tension member (7), Fig. 1 is a plan view of the truss upper chord 2, Fig. 2 is a plan view of the truss lower chord 3, and Fig. 3 is a sectional view thereof.

The truss phase presenter 2 consists of a girder 4 and a beam 5 or an auxiliary beam 6. A girder 4 is installed between the pillar and the pillar, and a beam 5 is installed between the girder 4 and the girder 4 in the long side direction. As shown in Figs. 1 and 2, the pillar member may be a square or a circular steel pipe as well as an H-beam, and in Fig. 1, an auxiliary beam 6 between the girder 4 and the beam 5 is shown. Although this state is installed, the auxiliary beam 6 may be omitted in some cases. As the truss top chord 2, an H-beam, an I-beam, a T-beam, or a steel pipe can be used. The girders 4 and the beams 5 use members having the same dimensions, but the auxiliary beams 6 do not have a large load, so a small member can be used. As shown in the figure, it is most preferable to divide the girders 4 or the beams 5 into three, but this may be divided into two or more portions, depending on the result of the structural calculation. The connection between the truss phase chord 2 and the column 1 is usually installed by a method used in steel construction, which is obvious to those skilled in the art.

As shown in Figs. 1 to 3, a plurality of posts 20 and 30 are vertically installed on the lower surface of the beam 5 or the girder 4, and the posts are installed at the intersection of the girder and the beam or the auxiliary beam. It is desirable to. A lattice truss lower chord 3 is provided between the lower ends of the posts. As the truss lower chord 3, an H-beam, an I-beam, a T-beam, a steel pipe or a steel sheet can be used. The truss lower chord 3 is engaged with the lower plate of the post by means such as rivets, bolts, high tension bolts or welding. Girder other than the lower chord 3b connecting the lower chord 3a connecting between the post 20 installed in the lower beam of the center of the truss lower chord and the post 30 installed below the girder 4 4) Since the lower chord 3c connecting the post 30 installed below and the post 20 installed below the beam 5 has a small load, a small member can be used.

1 and 2 show that the posts are installed at the lower part of the beam and the lower part of the girder, respectively, and the lower part of each post is connected to the truss under the trellis, but the post 30 installed at the lower part of the girder is omitted. The structure may be constructed by installing only the post 20 of the lower beam corresponding to the center portion of the slab and the truss lower chord 3a connecting the lower beam of the slab.

5 to 8 are detailed views of the fixed end 10. A fixed end is provided at a portion where the truss top chord 2 and the column 1 meet or the lower surface of the truss top chord 2. The fixed end 10 is fixed to the fixing holes 25 and 35 at the lower end of the post by hooking the tension member 7 and is installed in the diagonal direction and the main column direction of the pillar.

5 and 6 are plan and elevation details of the fixed end 10 in the diagonal direction. The fixed end in the diagonal direction is for installing the tension member 7 between the posts 20 installed in the lower part of the beam, and the horizontal iron plate between the posts on the same plane as the upper flange surface of the upper chord 2. 11) is installed by welding horizontally, and the hook 12 is attached to the lower side of the horizontal iron plate (11). Hanger 12 is installed to be inclined to cut the round steel pipe to be inclined toward the pillar. Since the hook 12 is inclined toward the pillar, the tension member 7 is wound around the hook 12 so that both ends of the tension member are inserted into the through-hole of the lower end of the post, and the tension member 25 is released. It doesn't work. When the tension member 7 is tensioned using a hydraulic jack and then fixed to the anchorage 25, the end of the post is rotated toward the column by the tension force of the tension member 7, but the lower part of the post is restrained by the truss lower chord. As a result, upward synthetic force is generated. The reinforcing steel plate 13 is vertically welded between the column and the pillar in the same direction as the direction of the tension member so as to resist the tensile force applied to the horizontal steel plate 11 by the tension member 7. do.

7 is a modification of the fixed end, and forms a hole such as a horizontal cross-sectional shape of the column so that the pillar can be fitted to the horizontal iron plate 14 of the octagonal shape, and the horizontal iron plate 14 is inserted into the pillar. It is installed by welding to the pillar 1 and the girder 4, respectively. When the cross-section of the column is H-shaped, complex drilling operations may be burdensome, so as shown in FIGS. 1 and 2, rectangular or circular column cross sections may be used, and empty space may be filled with concrete. Next, the above-described clasp 15 is welded and installed on the lower surface of the horizontal iron plate 14 in a diagonal direction.

Fig. 8 is an elevation view in which the fixed end in the row direction is installed, wherein the fixed end in the row direction is for installing a tension member between the posts provided in the lower part of the girder, and directly the truss 16 without the additional member is provided. On the lower surface of the upper chord 2 is installed by welding so that the lower end of the latch 16 is inclined toward the column. The hook 16 is installed to be inclined to cut the round steel pipe as described above so that the steel pipe is inclined toward the pillar, and the tension member is wound around the hook and rotated to insert the both ends of the tension member into the through hole of the lower end of the post. And it can be settled in the fixing opening 35.

9 and 10 are detailed views of the post 20 installed at the intersection of the beam 5 with the sub-auxiliary beam 6. The post 20 is composed of the vertical member 21, the upper iron plate 22, the lower iron plate 23, the fixing iron plate 24 and the fixing unit 25. The vertical member 21 uses a circular or rectangular steel pipe or steel bar, and attaches the upper steel plate 22 having a shape such as a circular, square or octagon to the top of the vertical member 21 horizontally. The upper steel plate 22 is coupled with the truss top string 2 by means such as rivets, bolts, high tension bolts or welding. The lower iron plate 23 having the same shape as the upper iron plate 22 is attached to the middle of the vertical member 21. The lower iron plate 23 is formed with a hole having the same diameter as the outer diameter of the vertical member 21 so that the vertical member 21 can be inserted, the lower iron plate 23 is inserted into the vertical member 21 and welded Fix it. The lower steel plate 23 is coupled to the truss lower chord 3 by means such as rivets, bolts, high tension bolts or welding. A fixing iron plate 24 is inclined between the lower iron plate 23, the beam 5, and the auxiliary beam 6, and the fixing iron plate 24 has a hole for inserting the tension member 7 therein. And the fixing unit 25 is installed on the outer surface. The lower side of the vertical member 21 communicates with a hole formed in the fixing iron plate 24 and a through hole in the vertical direction is formed in the fixing iron plate 24. Therefore, the tension member 7 may be inserted into the through hole formed in the vertical member 21 and the hole formed in the fixing iron plate 24 to fix the fixing member 25.

11 and 12 are detailed views of the post 30 installed at the intersection of the lower beam 5 or the auxiliary beam 6 of the girder 4. The post 30 installed in the lower part of the girder 4 also has the vertical member 31, the upper iron plate 32, the lower iron plate 33, the fixing iron plate 34, and the fixing unit, like the post 20 installed in the lower beam. Although the configuration is the same as (35), there is a slight difference in the shape of the fixing plate 34 and the installation direction of the tension member (7). The upper steel plate 32 is attached to the upper end of the vertical member 31 to bind with the truss upper chord 2, and the lower steel plate 33 is installed at the middle of the vertical member 31 to bind with the truss lower chord 3. do. The lower end portion of the vertical member 31 is inclinedly cut, and the fixing iron plate 34 is attached to the inclined cut portion. The vertical member 31 and the fixing iron plate 34 are formed with holes penetrating in the vertical direction to the fixing iron plate 34, and the fixing iron plate 34 is formed with the fixing holes 35. Accordingly, the tension member 7 may be inserted into the fixing hole to fix the fixing member 35.

One end of the tension member 7 is inserted into the lower end through hole of the posts 20 and 30, and the other end is turned to the lower end through hole of the posts 20 and 30 by turning the latch of the fixed end 10 once. It is inserted and fixed to the fixing holes 25 and 35. As the tension member 7, it is common to use a PC steel wire, but a member such as a steel bar may be used. Fixing of the tension member 7 uses a fixing device for fixing a PC steel wire or a rock anchor of prestressed concrete. Tension of the tension member (7) is to use a hydraulic jack in the main row direction and the diagonal tension member to be paired with each other, it is preferable to simultaneously tension with four hydraulic jacks in the diagonal direction.

When the tension member 7 is installed between the fasteners 12 and 16 of the fixed end 10 and the fixing holes 25 and 35 at the lower ends of the posts 20 and 30, the tension member 7 is tensioned and fixed. The lower end of the post tries to rotate toward the column, but the lower part of the post is constrained by the truss lower chord 3, and as a result, upward synthetic force is generated. This is the same as introducing a kind of prestress, and the lifting current in the upper chord (2) occurs in the upward direction, and the fixed load and the loading load are applied later to compensate for the sagging or crack occurring in the current chord in advance. Structurally much more advantageous.

4 is a plan view of the deck plate (8) installed on the truss top chord (2), when the tension and fixing of the tension member is completed, the formwork such as deck plate (8) is installed on the truss top chord (2) Reinforce the wire or wire mesh, then pour concrete to complete the structure.

By using the three-dimensional truss floor structure of the present invention it is possible to build a floor structure using a bi-directional truss can increase the structural efficiency. In addition, by introducing prestress into the tension member, deflections and cracks occurring in the structure can be compensated in advance, so that the dimension of the structural member can be reduced, which is very economical.

Conventionally, it was necessary to secure the space for the installation pipes installed under the ceiling separately under the slab structural member, but in the present invention, the facility pipes are sufficient through the space formed between the tension member and the upper and lower chords so that the height of the floor can be lowered. have.

In addition, the appearance of the ceiling after the construction is beautiful, there is an advantage that the ceiling may not be installed in some cases.

Claims (7)

A truss phase presenter (2) consisting of a plurality of girders (4) connecting between the pillar (1) and the pillar (1) and a plurality of beams (5) connecting between the girders (4) and the girders (4); A fixed end 10 installed at a portion where the pillar 1 and the girder 4 cross each other; A plurality of posts 20 installed vertically below the center of the beam 5; A truss lower chord 3a connecting lower ends of the plurality of posts 20; A plurality of tension members (7) connecting the lower ends of the posts (20) diagonally adjacent from the fixed end (10); Fixing means for tensioning and fixing the tension member (7); And, A slab structure installed above the truss top chord (2); Three-dimensional truss bottom structure, characterized in that consisting of. According to claim 1, A plurality of posts (30) are installed on the lower surface of the girder (4) where the girder (4) and the beam (5) intersect; A truss lower chord 3b connecting the lower end of the post 30; Hanger 16 is installed on the lower side of the column side of the girder (4); A tension member (7) connecting the lower end of the hook (16) and the post (30); And, Fixing means for tensioning and fixing the tension member (7); Three-dimensional truss flooring structure further comprising. 3. The three-dimensional truss floor structure according to claim 1, wherein the truss upper chord (2) or the truss lower chord (3) is one of an H-beam, a T-beam, an I-beam, a steel pipe, or a steel sheet. 3. The three-dimensional truss flooring structure according to claim 1, wherein the beams (5) connect the three quadrants of the girders (4), respectively. The method of claim 1, wherein the fixed end 10 A horizontal iron plate (11) attached horizontally between the girder (4) and the column (1); It is installed in the lower portion of the horizontal iron plate (11), the lower side is installed to be inclined toward the pillar can be fixed to the tension member (7) by hanging; And, A reinforcing iron plate 13 installed at an upper portion of the horizontal iron plate 11 to connect the pillar 1 and the horizontal iron plate 11; Three-dimensional truss bottom structure, characterized in that consisting of. The method of claim 1, wherein the fixed end 10 A horizontal iron plate 14 having a hole formed in a shape such as a horizontal cross section of the pillar to be inserted into the pillar 1, and fixed to the pillar 1 and the girder 4 after being inserted into the pillar; And, A catcher 15 installed in a diagonal direction at a lower portion of the horizontal iron plate 14 and installed downwardly at an inclined side toward a pillar to fix the tension member 7 by walking; Three-dimensional truss bottom structure, characterized in that consisting of. The method of claim 1, wherein the post 20 Vertical member 21; An upper steel plate 22 horizontally attached to an upper portion of the vertical member 21 and bound to the truss upper chord 2; A lower iron plate 23 horizontally attached to the middle of the vertical member 21 and engaged with the truss lower chord 3; A fixing iron plate 24 installed at a lower side of the vertical member 21 and having a hole into which the tension member 7 can be inserted; And, A fixing unit 25 attached to the fixing iron plate 24; Consists of a three-dimensional truss bottom structure, characterized in that the through hole connected to the fixing member 25 is formed to be inclined at the lower side of the vertical member (21).