JPH06322818A - Connection structure for unboned brace - Google Patents

Abstract

PURPOSE:To facilitate connecting construction by connecting a connection part fixed on a structure and an unboned brace together by a lap-joint plate through butt connection between H-shape steel sections provided at ends. CONSTITUTION:A connection part 13 is provided at a connection between a column and a beam of a structure, and an unboned brace 20 is connected and fixed in the diagonal state between the connection parts 13. This unboned brace 20 is constituted by an H-shape steel 21, a concrete 24 slidably covering the H-shape steel 21 and a reinforcing plate 23. Then, the H-shape steel sections 21 of the unboned brace 20 are butt-connected to the connection part 13 and fixed with a bolt by connecting a lapjoint plate to it. Thus, local buckling can be prevented by reducing stress at an end of core steel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unbonded brace for strengthening the proof strength of a frame structure against loads and various external forces, and more specifically, a bonded structure of an unbonded brace capable of restraining local buckling of a core steel material by simple reinforcement. Regarding

[0002]

2. Description of the Related Art A conventional unbonded brace 50 is shown in FIGS.
As shown in FIG. 7, H-shaped steel material 51 is replaced with concrete 54
It is known that the building is covered by a diagonal line between the connection portions 13 provided at the joints of the columns 11 and the beams 12 of the structure 10, and the weight of the building on the structure 10, the floor,
It is used for the purpose of strengthening the resistance to loads such as snow and external forces such as earthquakes and storms (see Fig. 1).

The conventional unbonded brace 50 is
The H-shaped steel material 51 formed from the protruding web 51a of the concrete 54 and the two flanges 51b is attached to the structure 1
H formed by the connection web 13a and the connection flange 13b of the connection portion 13 fixed to 0
The bolt holes 52, 14 that are abutted against the surface and are respectively bored (FIG. 5) are formed in the web overlapping plate 31a (not shown) and the flange overlapping plate 31b (not shown). ), And bolt 32 and nut 33 respectively
They are connected and fixed by screwing (see FIG. 6).
In this case, in order to reinforce the decrease in yield strength due to the cross-section loss of the bolt holes 52 and 14 through which the bolt 32 is passed, the width of the flange 51b at the portion where the flange overlapping plate 31b abuts is wide, and the unbonded brace is further formed. Fifty
A reinforcing plate 53 is welded between both ends of the flange 51b so as to be parallel to the web 51a at the clearance 65 portion and some portions of the concrete portion (see FIGS. 5 and 6).

[0004]

However, in the conventional unbonded brace 50, as described above, the means for reinforcing the decrease in yield strength due to the cross-sectional defect of the bolt hole 52 and the bolt hole 14 is the flange weight. Joint plate 3
The means for widening the width of the flange 51b where 1b abuts is used together with the means for welding the reinforcing plate 53 to the flange 51b of the clearance 65 part and a part of the concrete part so as to be parallel to the web 51a. There is. Therefore, the former means has a problem that the cost is increased by an amount corresponding to the increase in the plate, which is not economical, and the latter means causes the reinforcing plate 5 to the flange 51b.
3 has a drawback that it is difficult to weld and requires a lot of labor and time.

The present invention has been made in order to solve the drawbacks of the prior art, and its purpose is to reinforce the decrease in proof strength due to the cross-section loss of the brace-side bolt hole 52 and the connection-side bolt hole 14. In addition, it is not necessary to form a large flange width or weld the reinforcing plate 53 to the flange 51b in the clearance 65 so as to be parallel to the web 51a. An object of the present invention is to provide an unbonded brace that is easily reinforced while being easily reinforced with the conventional H-section steel standard.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned object, and its gist is to provide a connection portion and an unbonded brace fixed to a structure, a flange and a web at each end. A structure in which the H-shaped steel parts having the above are abutted to each other to join the flanges of the H-shaped steel parts with a flange overlapping plate, and the webs of the H steel parts are joined together with a web overlapping plate. An unbonded brace joining structure is characterized in that a reinforcing plate is welded to at least one side surface of an end portion of a web of the unbonded brace inside the joint plate.

[0007]

According to the joining structure of the unbonded brace of the present invention, the flange width is widened or a reinforcing plate is installed between the flanges for welding in order to reinforce the reduction of the yield strength due to the cross-section loss of the bolt holes 52 and 14 in the conventional web portion. What had to be done was to weld the reinforcing plate to the inner brace of the conventional web overlapping plate so as to widen the flange overlapping plate width by this reinforcement or to install the reinforcing plate between the plates. By simply welding this reinforcing plate to the brace in advance, and also welding the reinforcing plate to the end of the connection part if necessary, the brace and the connection part have the same flange and web as before. It is sufficient to join the overlapping plates of No. 2 with bolts or tacks.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited thereto.

The unbonded brace 20 of the present invention, which can easily reinforce the end portion of the core steel material, has the connection portion 13 provided at the joint portion between the column 11 and the beam 12 of the structure 10.
The structure 1 is diagonally connected and fixed (see FIG. 1).
This is to reinforce the proof stress of the column 11 and the beam 12 against the load applied to 0 and external forces. The unbonded brace 20
Is composed of an H-shaped steel material 21, concrete 24 slidably covering the H-shaped steel material 21 except both ends thereof, and a reinforcing plate 23 for reinforcing the uncoated end portion of the H-shaped steel material 21. (See FIG. 2), the connection member 31 is connected and fixed to the connection portion 13 (see FIG. 3).

The H-shaped steel material 21 is, as shown in FIG.
The web 21a and the flanges 21b provided on both sides of the web 21a at right angles and in parallel are formed into an H-shaped cross section. Reinforcing plates 23 are welded from both sides to the ends of the webs 21a forming the H-shaped steel material 21, and the webs 21a to which the reinforcing plates 23 are welded and the flanges 21b on both sides of the welded portions have the connection portions. A bolt hole 22 for connecting to 13 is formed.

As is clear from FIG. 4, the concrete 24 has a reinforcing plate 23 welded to the other end from an intermediate portion of the reinforcing plate 23 welded to one end of the H-shaped steel material 21.
The H-shaped steel material covering the middle portion of the above is slidably covered by unbonding and provided to restrain the buckling of the H-shaped steel material.

The connection portion 13 to which the unbonded brace 20 is connected is formed by a connection web 13a and an H-shaped connection flange 21b provided on both sides of the connection web 13 at right angles and in parallel. Similar to the H-shaped steel material 21, the connection reinforcing plate 15 is welded from both sides to the connection side end of the connection web 21a, and the connection web 13a to which the connection reinforcing plate 15 is welded, and the connection on both sides of this welded portion. Plural bolt holes 14 for connecting and fixing the unbonded brace 20 are formed in the flange 13b.

As shown in FIG. 3, the connecting member 31 for connecting the unbonded brace 20 and the connection portion 13 comprises a web overlapping plate 31a, a flange overlapping plate 31b, a bolt 32 and a nut 33, The web overlapping plate 31a and the flange overlapping plate 31b are provided with openings (not shown) into which the bolts 32 are inserted so as to match the bolt holes 22 and 14.
The unbonded brace 20 and the connection portion 13 have a web 21a in which a reinforcing plate 23 of an H-shaped steel material 21 is welded.
H and the flange 21b are formed by the connection web 13a and the connection flange 13b to which the connection reinforcing plate 15 of the connection portion 13 is welded.
The web-type connecting plate 31a and the flange-type connecting plate 31b are brought into contact with the abutting H-shaped steel material 21 and the connection portion, and the bolts 32 are attached to the bolt holes 22 and 14, respectively. Insert the nut 3
It is fixed by screwing together with 3.

In this way, the both ends of the unbonded brace 20 in which the ends of the H-shaped steel material 21 are simply reinforced are the structures 1
Styrofoam 25 (see FIG. 4), which is connected and fixed to the connection part 13 provided at 0 and is provided inside the reinforcing plate 23 in the material axis direction, and a clearance provided between the connecting member 31 and the concrete 24. 35 (see FIG. 3) to slide, and enhance the proof stress of the structure 10 against external forces.

In this embodiment, when the web 21a and the connection web 13a have the same thickness, the reinforcing plates 23 are welded to both sides of the web 21a of the unbonded brace 20 for reinforcement, and the connection web of the connection portion 13 is also provided. Although the connection reinforcing plate 15 is welded to both surfaces of 13a to reinforce and the reinforced unbonded brace 20 and the connection portion 13 are connected, the present invention is not limited to this, and the connection portion 13 When the connection web 13a is thicker than the web 21a of the unbonded brace 20, one side or both sides of the web 21a may be provided with the reinforcing plate 2.
It is also possible to adopt a structure in which 3 is welded.

[0016]

The unbonded brace of the present invention comprises an H-shaped steel portion having a flange and a web, and concrete that slidably covers the steel portion, and a reinforcing plate is welded to the web of the unbonded brace. Because
The reinforcing plate to be welded reduces the stress at the end of the core steel to prevent local buckling, strengthens the resistance to various external forces, facilitates precasting of unbonded braces, and joins with the connection part. Workability can also be simplified.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an entire joining structure of the present invention and a conventional unbonded brace.

FIG. 2 is an enlarged perspective view showing an unbonded brace and a connection portion according to the joining structure of the present invention.

3 is an enlarged perspective view showing a joint structure of the unbonded brace and the connection portion of FIG. 2. FIG.

FIG. 4 is a perspective view showing an unbonded brace cut along the line 4-4 ′ in FIG.

FIG. 5 is an enlarged perspective view showing an unbonded brace and a connection portion according to a conventional joining structure.

6 is an enlarged perspective view showing a joint structure of the unbonded brace and the connection portion of FIG.

7 is a perspective view showing an unbonded brace taken along line 7-7 'of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Structure 11 Column 12 Beam 13 Connection part 14 Bolt hole 20 Unbonded brace according to the present invention 21, 51 H type steel material 22, 52 Bolt hole 23, 53 Reinforcing plate 24, 54 Concrete 25 Foaming polystyrene 31 Connecting member 35, 65 Clearance 50 Conventional unbonded brace

Claims (1)

[Claims] 1. A H-shaped steel portion having a flange and a web at each end of a connection portion and an unbonded brace fixed to a structure is abutted to each other, and the flange of each H-shaped steel portion is formed by a flange overlapping plate. A structure in which the webs of the H steel parts are joined together by a web splicing plate, and a reinforcing plate is welded to at least one side surface of an end of the web of the unbonded brace inside the web splicing plate Bonding structure of unbonded brace.