JPH03212543A - Structure of wall body and bonding method of said wall body with body - Google Patents

Abstract

PURPOSE:To obtain a PC earthquake-resisting wall having a sufficient resistance to an external force added to a construction at the time of an earthquake by providing an uneven surface on the end surface of a wall body in the bonding of a cast-in-place concrete body with the wall body forming the wall part of the construction. CONSTITUTION:The bonding surface 15 of a wall body 13 forming the wall part of a construction with the body 10 of the construction by reinforcements such as steel materials is formed into an uneven surface 17. The end surface bonding surface 15 of the wall body 13 has a plurality of anchor bars 18 in the state protruding toward the beam 10a and pillar 10b of the construction constituting the body 10, so that, even if a stress is generated in the wall part surface direction by an external force such as earthquake, the stress is directly transmitted to the body 10 around the wall body 13. Concrete is placed in the body 10 to integrally bond the wall body 13 to the body 10.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention relates to the structure of a wall that is joined to a framework made of cast-in-place concrete to constitute the wall of a structure, and a method for joining the wall and the framework. .

“Conventional technology” The PC composite construction method aims to streamline construction and save labor.
It is currently widely used and is highly effective. PC
A considerable number of slabs are used as floor slabs. When converting to PC, which is used as such a floor slab, an uneven surface (cotter) is provided on the joint surface between the beam and the PC floor slab, and the PC floor slab is placed at a predetermined position on the building frame.
The connection was made by placing cast-in-place concrete at the joint between the c-floor slab and the frame.

“Problem to be solved by the invention” However, in the conventional construction method applying PCization,
The half PC wall construction method is used to join floor slabs and beams, and the half PC wall construction method is used to some extent for the purpose of building earthquake-resistant walls for structures. Due to these problems, it has not yet reached the level of complete practical use.

The so-called semi-complete PC wall, in which most of the wall is made of full PC and only the joints are made of half PC, has the advantage that formwork construction can be greatly simplified.
Better than half pc*.

On the other hand, it is important for the design of a PC shear wall that after post-cast concrete is placed, it can be considered to be almost the same as a shear wall made of an integrally cast wall and frame in terms of rigidity and strength. This is a condition that must be ensured when determining whether or not it can be used in conjunction with walls constructed using conventional construction methods.

By the way, in the above-mentioned semi-complete PC wall construction method, if the wall reinforcement is a normal double reinforcement arrangement, one side will go into the half PC wall, and the other side will protrude from the full PC edge face and be integrated with the post-cast concrete. Become.

The problem here is that at the joint surface between the full PC edge face and the post-cast concrete, only one side of the double reinforcement is connected, so the dowel shear strength of the reinforcing bars alone is insufficient to transmit the shear stress of the concrete. There are things that aren't there.

Of course, as shown in Figs. 12 and 13, it is possible to add reinforcing bars 4 to the joint surface 3 between the frame 1 and the wall 2, but it is difficult to make PC boards (formwork removal) or on-site. There remain problems with the filling properties of concrete during post-cast concrete pouring.

In addition, if only dowel reinforcement is used, latent cracks are present in the concrete joint surface from the beginning, so as shown in FIG. 14, slipping behavior will be exhibited from a small stress level, which is not preferable.

The present invention has been made in view of the above-mentioned circumstances, and includes a structure of a wall body capable of providing a PC-based seismic wall having sufficient resistance against external forces applied to the structure during an earthquake, etc., and an integral structure thereof. The purpose is to provide a joint structure between the main body and the building frame.

"Means for Solving the Problems" The wall structure of the present invention is provided on a frame made of cast-in-place concrete to constitute a wall of a structure, and includes at least one part of the wall and the frame. It is characterized in that an uneven surface is provided on the wall end face of one joint surface.

Further, the method for joining a wall and a frame of the present invention includes a step of constructing a frame of a structure with a reinforcing material made of steel or the like, and forming a wall of the structure and at least connecting the wall and the frame. The method is characterized by comprising a step of constructing a wall in which an uneven surface is provided on the end face of the wall at one joint surface, and a step of pouring concrete into the framework and joining the wall and the framework as one body. There is.

"Function" In a structure having a wall made of the wall structure of the present invention, even if stress is generated along the surface direction of the wall due to an external force such as an earthquake, the stress can be absorbed by the surroundings of the wall. It can be transmitted directly to the body. The shearing force acting on the uneven surface of the wall is a direct shearing force, and the shearing force acting on the wall itself is due to the 45@principal stress degree, so the unevenness of the wall also affects the yield strength of the wall. It can be set so that the wall strength is reached before surface failure.

"Embodiments" Examples of the present invention will be described below with reference to the drawings.

In the embodiment shown in FIGS. 1 and 2, in the structure of the wall 13 that is provided on the frame 10 made of cast-in-place concrete and constitutes the wall of the structure, at least the wall 13 and the frame 10 are The wall end face 16 of one joint surface 15 is provided with an uneven surface 17.

The frame 10 is made up of beams 10, columns 10b, etc. of the structure. These beams 101 and columns 10b are so-called RC beams and RC columns, which are constructed by pouring cast-in-place concrete onto reinforcing materials such as reinforcing bars.

The wall 13 is a PC wall in which most of the wall is made of PC, and is formed so that the wall thickness becomes slightly thinner at the joint surface with the beam 101 and the column 10b.

Further, as shown in FIGS. 3 and 4, the end face of this wall body 13 is formed into a cursor shape in appearance, and an uneven surface 17 is formed on the joint surface with the column lOb.

Furthermore, from the joint surface of this wall 13, there are a beam 10s, a column 1
A plurality of anchor bars 18 protrude toward 0b.
...is provided.

When constructing a wall part of a structure using the wall body 13 of this embodiment, the frame 10 of the structure is
After constructing the wall 13 and arranging the wall 13 at a predetermined position on the frame 10, as shown in FIG. 5 and FIG.
This is done by joining them together as one body. Note that in FIGS. 5 and 6, reference numeral 14 indicates reinforcing bars arranged within the columns of the frame 10.

When an external force such as an earthquake acts on a structure having such a structure in which the wall body 13 and the frame body 10 are joined, the force is transmitted as shown in FIGS. 7 to 9. Here, as described above, the wall 13 is connected to the column 10b via the anchor reinforcement 18, and the wall 13 of the beam 10a1
0c via a lap joint 19.

That is, the beam 101.10a of the frame 10 and the wall 1
The transmission force between the pillars 10b, 10b and the wall 13 is transmitted as shown by the symbols ■ and ■, and the transmission force between the pillars 10b and the wall 13 is transmitted as shown by the symbols ■ and ■. Furthermore, between the walls 13 and 13 adjacent to each other, the transmitted force has signs ■, ■
The information is transmitted as shown in .

According to the wall 13 of this embodiment, even if stress is generated along the surface direction of the wall due to an external force such as an earthquake, the stress can be transferred to the wall 13.
3 can be directly transmitted to the surrounding building frame 1. That is, the rigidity at the joint surface between the wall body 13 and the frame body 1 can be made equivalent to that of integral casting. The shearing force acting on the uneven surface 17 of the wall 13 is a direct shearing force, and since the shearing force acting on the wall 13 itself is due to the 45° principal stress degree, it also affects the yield strength of the wall 13. Uneven surface 17 of wall body 13
It is possible to achieve the excellent effect of being able to set the wall strength so that the wall strength is reached before the wall is destroyed.

Furthermore, since a semi-complete PC wall can be used as a seismic wall, most of the wall can be made completely PC and only the joints can be made half PC, which greatly simplifies formwork construction. I can do it.

Note that the structure of the wall body of the present invention is not limited to that of the embodiment described above, and other modifications are also possible. For example, as shown in FIGS. 10 and 11, the end face of the wall 13 at the joint surface between the wall 13 and the column 1b is
It is also possible to use a plate, a mesh, etc. to form the discontinuous surface 20, and even in this case, the same effects as in the above embodiment can be achieved.

"Effects of the Invention" The wall structure of the present invention is provided on a frame made of cast-in-place concrete to constitute the wall of the structure, and at least one joint surface between the wall and the frame is provided. The structure has an uneven surface on the end face of the wall, so that it is possible to directly transmit the stress generated in the concrete to the concrete, and it is possible to make the rigidity and strength equivalent to that of one-piece concrete. In addition, the shearing force that acts on the uneven surface is direct shearing, and the shearing force that acts on the shear wall is due to the 450 principal stress degree, so it has the advantage of being able to be designed to reach the wall capacity before the uneven surface breaks. It is possible to achieve the following effects.

Furthermore, a so-called semi-complete PC wall, in which most of the wall is made of full PC and only the joints are made of half PC, can be used as a seismic wall, so formwork work can be greatly simplified.

Further, the method for joining a wall and a frame of the present invention includes a step of constructing a frame of a structure with a reinforcing material made of steel or the like, and forming a wall of the structure and at least connecting the wall and the frame. The process consists of a process of constructing a wall in which an uneven surface is provided on the end face of the wall at one joint surface, and a process of pouring concrete into the frame and joining the wall and the frame as one body. , it is possible to easily connect the PC wall and the frame made of cast-in-place concrete, and also to connect the wall and frame without causing slippage between the wall and the frame. It can produce excellent effects.

[Brief explanation of drawings]

1 to 9 are diagrams showing a first embodiment of the present invention, in which FIG. 1 is a front view of a wall, FIG. 2 is a cross-sectional plan view of a wall and a column, and FIG. FIG. 4 is a perspective view of the joint surface of the wall; FIG. 5 is a cross-sectional plan view showing the joint state of the wall and frame; FIG. 6 is the cross-sectional plane in FIG. 5. 7 to 9 are state diagrams showing the state of transmission of external force between the wall and the frame, and FIGS. 1O and 11 are diagrams showing a second embodiment of the wall of the present invention, FIG. 10 is a cross-sectional plan view of the joint surface of the wall, FIG. 11 is a perspective view of the joint surface of the wall, and FIGS. 12 to 14 are diagrams showing a conventional example of the joint state of the wall and the frame. be. 10...Structure, 13...Wall, 17...Irregular surface,
0 Discontinuous surface.

Claims (2)

[Claims] (1) In the structure of a wall that is provided on a frame made of cast-in-place concrete and constitutes a wall of a structure, an uneven surface is provided on the end face of the wall at at least one joint surface between the integral body and the frame. A wall structure characterized by (2) A step of constructing the frame of the structure with reinforcing material made of steel or the like, a step of constructing the wall according to claim 1 which constitutes the wall of this structure, and a step of constructing the frame with concrete. A method for joining a wall and a frame, comprising the step of pouring and joining the wall and the frame as one body.