JPH11280178A - Reinforcing bar construction for wall beam, wall beam construction, and bearing wall construction of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce construction cost and secure effective space for building by connecting a plurality of main bars parallel to the longitudinal direction with stirrups and further connecting the main bars with reinforcing plates thereby securing strength and tenacity of the wall beam even though the cross sectional area of a portion requiring shear reinforcement remains small. SOLUTION: For a floor slab 3, wire mesh 5 is placed in an upper portion of a floor panel for an upper story placed on the top portion 1a of a PCa (precast concrete) arranged in plurality, and reinforcing bar structural body A for the wall beam is fixed to an anchor bar 6 projected out from the top portion 1a of PCa panel 1 downstairs and raised and arranged. Then, concrete is poured and the floor panel, wire mesh 5, and anchor bar 6 and reinforcing bar construction body A is fixed in one united body. The reinforcing bar structural body A has two main bars 7 parallel in longitudinal direction at up and down positions, stirrups 8 are intersected to both main bars 7 and welded to connect both the main bars 7, and the steel reinforcing plate 9 is intersected to both the main bars 7 and raised and flare welded thereby connecting both the main bars 7 for reinforcement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar structure for a wall beam in a reinforced concrete building, a wall beam structure having the same, and a bearing wall structure of a building having the same.

[0002]

2. Description of the Related Art Conventionally, in a wall beam structure in a reinforced concrete building, as shown in FIG. 5, the lower end of a reinforced concrete wall beam 52 cast on the top of a plurality of precast panels 51 arranged side by side. Are arranged in contact with each other, whereby the load-bearing wall composed of the precast panel 51 is integrated with a floor slab (not shown).

[0003]

However, in the above-mentioned conventional example, when the horizontal force F shown in FIG.
A rotational force acts in the direction of arrow a, and a shearing force is generated in the directions of arrows b and c at the mutual boundary between the tops of the adjacent precast panels 51.

[0004] The wall beam 52 is a precast panel 51 provided next to it.
5 is generated so as to straddle the mutual boundary portion between the tops of the walls, and the shearing force generated in each of the precast panels 51 in the directions of arrows b and c in FIG. In order to prevent this, it is necessary to increase the cross-sectional area of the wall beam 52 or to increase the strength of the concrete itself, and there is a problem that the concrete placement amount, material cost and construction cost increase. . In some cases, the effective space of the building is limited by the increase in the volume of the wall beams 52.

Recently, it has been desired to design the thickness of the wall beam 52 in accordance with the thickness of the floor slab and the wall thickness of the load-bearing wall composed of the precast panel 51 so that the outer shape of the wall beam 52 does not appear in the room. Therefore, the volume of the wall beam 52 is often limited.

[0006] The present invention is to solve the above-mentioned problems,
The purpose is to provide a reinforcing plate at the portion of the wall beam that requires shear reinforcement, so that the strength and toughness of the wall beam can be secured even when the cross-sectional area of the wall beam is small, and the construction cost is reduced. An object of the present invention is to provide a reinforcing structure for a wall beam capable of reducing the size and securing an effective space of a building, a wall beam structure having the same, and a load-bearing wall structure of a building having the same.

[0007]

A reinforcing bar structure for a wall beam according to the present invention for achieving the above object has a plurality of main bars parallel to the longitudinal direction and stirrups connecting the main bars. In a reinforcing bar structure for a wall beam, a reinforcing plate connecting the main bars is provided.

[0008] According to the above configuration, the wall beam can be effectively reinforced by the reinforcing plate.

The wall beam structure according to the present invention is a wall beam structure in which the reinforcing bar structure for the wall beam is embedded in concrete, and the reinforcing plate is embedded in a portion of the wall beam that requires shear reinforcement. It is characterized by having done.

[0010] According to the above construction, the wall beam can be effectively reinforced by the reinforcing plate embedded in the concrete, so that the strength of the wall beam can be ensured even if the cross-sectional area of the wall beam is small, and And the material cost and the construction cost can be reduced, and the increase in the volume of the wall beams can be suppressed to secure the effective space of the building.

Further, the load-bearing wall structure of a building according to the present invention comprises:
The wall beam structure abuts on tops of a plurality of precast panels arranged in parallel, and the reinforcing plate is embedded in the wall beam structure so as to straddle a boundary between the adjacent precast panels. .

According to the above construction, a horizontal force acts on each precast panel due to an earthquake or the like, and a rotational force acts on each precast panel. The reinforcing plate buried in the wall beam structure so as to straddle the boundary portion between the precast panels that have been subjected to the shearing force generated at the boundary portion between the adjacent precast panels can maintain the strength of the wall beam. It is possible to secure the maintenance of wall beams.

Therefore, as described above, the strength of the wall beam can be ensured even if the cross-sectional area of the wall beam remains small, and the amount of concrete to be poured, material cost and construction cost can be reduced, and the wall beam can be reduced. It is possible to secure an effective space of a building by suppressing an increase in volume.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of a reinforcing bar structure for a wall beam according to the present invention, a wall beam structure having the same, and a bearing wall structure of a building having the same will be specifically described. FIG.
Is a perspective explanatory view showing a state in which a reinforcing bar structure for a wall beam according to the present invention is incorporated into a load-bearing wall structure of a building, FIG. 2 is a perspective view showing a load-bearing wall structure of a building according to the present invention, and FIG. FIG. 4 is a cross-sectional explanatory view showing the load-bearing wall structure of the building, and FIG. 4 shows a horizontal force F due to an earthquake or the like in the load-bearing wall structure of the building according to the present invention.
FIG. 7 is a schematic diagram showing a state in which a function is performed.

In a wall beam structure in a reinforced concrete building, as shown in FIGS.
The lower end 2a of the reinforced concrete wall beam 2 cast on site is placed on the top 1a of the a (precast concrete) panel 1 so that the load-bearing wall made of the PCa panel 1 is placed on the floor slab 3 on the upper floor. It is integrated with.

The floor slab 3 is located on the top 1 of the PCa panel 1.
A mesh bar 5 is arranged above the upper floor PCa panel 4 placed on a part of the PCa panel 1, and an end surface 4 a of the upper floor PCa panel 4 at a part on the top 1 a of the PCa panel 1. The reinforcing bar structure A for the wall beam 2 which will be described in detail later is fixed to the anchor bar 6 protruding from the top 1a of the PCa panel 1 on the lower floor, and is arranged upright. Pour concrete into the wall beam 2 at the site
The Ca panel 4, the mesh bar 5, the anchor bar 6, and the reinforcing bar structure A are integrally fixed.

In the reinforcing bar structure A, two main bars 7 composed of a long U-shaped reinforcing bar and the like are arranged vertically and parallel to the longitudinal direction. The two main bars 7 are connected and reinforced by welding and fixing. In addition, a reinforcing plate 9 made of a steel plate stands up across the two main reinforcing bars 7 and is fixed by flare welding so that the two main reinforcing bars 7 are connected and reinforced.

The reinforcing plate 9 is buried in a portion of the wall beam 2 where shear reinforcement is required, and the reinforcing bar structure A contacts the tops 1a of the plurality of PCa panels 1 arranged side by side. A reinforcing plate 9 provided in the reinforcing bar structure A is embedded so as to straddle the mutual boundary between the tops 1a of the adjacent PCa panels 1.

That is, in this embodiment, each PCa panel 1
Two anchor bars 6 are buried at predetermined positions in the width direction at both ends of the PCa panel 1 and project from the tops 1a of the PCa panels 1 along the vertical direction of the PCa panel 1. Steel reinforcing plate having a length corresponding to the spacing between the anchor bars 6 erected on both sides of the boundary portion, a height corresponding to the spacing between the upper and lower main bars 7, and a predetermined thickness. 9 is located between the anchor bars 6 erected on both sides of the mutual boundary portion of the top 1a of the adjacent PCa panel 1 and the top 1 of the adjacent PCa panel 1 is provided.
It is configured so as to straddle the mutual boundary part of a.

1 to 3, reference numeral 10 denotes another wall intersecting the PCa panel 1, reference numeral 11 denotes another beam, and reference numeral 12 denotes an upper floor PCa.
It is a panel.

In the above configuration, when a horizontal force F shown in FIG. 4 is applied due to an earthquake or the like, a rotational force is applied to each PCa panel 1, for example, in the direction of arrow a in FIG. A shearing force is generated in the direction of arrows b and c at the mutual boundary between the tops 1a of the two.

However, a reinforcing bar structure A having a steel reinforcing plate 9 is embedded inside the wall beam 2, and the top 1a of the PCa panel 1 adjacent to the reinforcing plate 9 is provided.
Are arranged so as to straddle each other's boundary portion, and are embedded in the wall beam 2 even when the shearing force in the directions of arrows b and c in FIG. The wall beam 2 can be reinforced by the reinforcing plate 9 thus secured, and the maintenance of the wall beam 2 can be ensured. Further, the toughness of the wall beam 2 after fracture can be ensured.

Therefore, it is not necessary to increase the cross-sectional area of the wall beam 2 or to specially increase the strength of the concrete itself as in the above-described conventional example, and it is possible to reduce the amount of concrete poured and the material cost. The effective space of the building can be increased by suppressing the increase in the volume of the wall beams 2.

Thus, it is easy to design the wall beam 2 so that the external shape of the wall beam 2 does not appear in the room in accordance with the thickness of the floor slab 3 and the wall thickness of the load-bearing wall composed of the PCa panel 1. I can do it.

In the above-described embodiment, the case where the reinforcing plate 9 is welded to the upper and lower main reinforcing bars 7 and fixed to the reinforcing bar structure A and buried inside the wall beam 2 has been described.
The reinforcing plate 9 is flared and fixed to the anchor bars 6 over the anchor bars 6 erected on both sides of the mutual boundary between the tops 1 a of the adjacent PCa panels 1, and fixed inside the wall beams 2. May be arranged so as to straddle the mutual boundary portion of the top 1a of the PCa panel 1 which is buried next to the PCa panel 1.

In the above-described embodiment, the adjacent PCa
The case where the reinforcing plate 9 is disposed so as to straddle the mutual boundary portion of the top 1a of the panel 1 and buried inside the wall beam 2 to reinforce the wall beam 2 has been described. As a portion requiring shear reinforcement, a reinforcing plate 9 is arranged facing the end of the top 1a of the PCa panel 1 adjacent to the opening where the window or the like is arranged, and buried inside the wall beam 2. You may comprise so that the wall beam 2 may be reinforced.

The same effect can be obtained by using a plate made of carbon, plastic, polypropylene, aluminum, stainless steel or the like other than the steel plate as the reinforcing plate 9. In addition, the PCa
The panel 1 can be widely applied even if it is a precast panel other than concrete, and is not limited to the above embodiment.

[0028]

Since the present invention has the above-described structure and operation, a reinforcing plate is provided at a portion where shear reinforcement of a wall beam is required. A reinforcing beam structure for a wall beam capable of securing strength and toughness, reducing construction costs and securing an effective space of a building, a wall beam structure having the same, and a bearing wall of a building having the same Structure can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view showing how a reinforcing bar structure for a wall beam according to the present invention is incorporated into a load-bearing wall structure of a building.

FIG. 2 is a perspective view showing a load-bearing wall structure of a building according to the present invention.

FIG. 3 is an explanatory sectional view showing a load-bearing wall structure of a building according to the present invention.

FIG. 4 is a schematic diagram showing a state in which a horizontal force F acts due to an earthquake or the like in the load-bearing wall structure of the building according to the present invention.

FIG. 5 is a diagram illustrating a problem of a conventional example.

[Explanation of symbols]

 A: Reinforcing bar structure 1: PCa panel 1a: Top portion 2: Wall beam 2a: Lower end portion 3: Floor slab 4: Floor PCa panel 4a: End face 5: Mesh bar 6: Anchor bar 7: Main bar 8: Stir bar 9: Reinforcement plate 10 ... Wall 11 ... Beam 12 ... PCa panel

Claims (3)

[Claims] 1. A reinforcing bar structure for a wall beam having a plurality of main bars parallel to the longitudinal direction and stirrups connecting the main bars, wherein a reinforcing plate connecting the main bars is provided. Reinforcement structure for wall beams. 2. A wall beam structure in which the reinforcing bar structure for a wall beam according to claim 1 is embedded in concrete, wherein the reinforcing plate is embedded in a portion of the wall beam requiring shear reinforcement. And wall beam structure. 3. The wall beam structure according to claim 2, wherein the wall beam structure according to claim 2 abuts on the tops of the plurality of precast panels arranged side by side, and the reinforcing plate straddles a boundary between the adjacent precast panels. A load-bearing wall structure of a building characterized by being buried in the structure.