JPH04108968A - Precast concrete earthquake resistant wall - Google Patents

Abstract

PURPOSE:To achieve stable building by building a precast concrete wall plate in the height direction and/or lateral direction, so as to fasten each stiffening beam through a linking material, and by filling a grout material in the gap of each stiffening beam. CONSTITUTION:Stiffening beams 2 for which large beams arranged between opposed wall plates are divided into two, are protruded on the opposed ends of upper and lower layers of precast concrete wall plates 1, in an integrated manner, while a sheath tube 3 for vertically penetrating each stiffening beam 2, is buried in the stiffening beam 2. The lower layer of the wall plate 1 is built in a predetermined position, while an adjuster 4 which also works as a sheath for connection, which is formed out of rubber and the like, and which has elasticity, is fixed to the predetermined position on the upper surface of the upper end stiffening beam 2, through a bonding agent and the like, and the upper layer of the wall plate 1 is tentatively put on the upper part thereof. A connecting material 5 made of steel, is inserted into the sheath tube 3 of each of the upper and lower stiffening beams 2, and is fastened, while a grout material 6 is filled in between both of the stiffening beams 2, and the connecting material 5 is fastened, so as to solidly connect the upper and lower wall plates together.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a precast concrete shear wall.

(Conventional technology) When precasting a shear wall with reinforced concrete or steel-framed reinforced concrete structure, the members are thin and unstable, making construction difficult. Difficult to settle down with steel materials.

Figure 7 shows a typical example of the conventional structure, showing the precast wall plate (C) on the upper floor and the precast wall plate (C) on the lower floor, which are installed above and below the beam (a) via connection sheaths and spacing adjusters (b). A reinforcing bar (g) is inserted across each connection sheath (e) embedded in the wall plate (d) and the connection sheath (f) embedded in the beam (a), and each of the wall plates ( C) (d) and beam (
The grouting material (h) is filled in the gap between the grout and the grout (a).

In the figure, (i) 0) is the reinforcing reinforcing bars of the beam (a) and wall plates (C) and (d).

(Problems to be Solved by the Invention) In the conventional structure described above, all the reinforcing bars for the connection sheath and reinforcing bars are to be contained within the range of the wall thickness t of the precast wall plate, so it is difficult to contain them. However, in many cases, the wall thickness needs to be larger than that originally required for an earthquake-resistant wall, which increases the weight of the building and is disadvantageous from an economic standpoint.

Furthermore, since construction is carried out only within the range of wall thickness t, there is a lack of stability until the connecting steel material is inserted, and temporary support with ropes, crutches, etc. is required.

The present invention was proposed in view of the problems of the prior art described above, and its purpose is to allow reinforcing bars and connecting steel materials to be contained within a seismic wall without increasing the wall thickness, and to enable the construction of a seismic wall without increasing the wall thickness. The purpose of the present invention is to provide a precast concrete shear wall that is stable.

(Means for Solving the Problems) In order to achieve the above object, the precast concrete shear wall according to the present invention has a precast concrete wall plate integrally provided with a stiffening beam that is vertically and/or horizontally In addition to connecting the stiffening beams of the same wall panels adjacent to each other with a connecting material, the gaps between the stiffening beams are filled with grout.

(Function) According to the present invention, as described above, the stiffening beams are integrally provided with the precast concrete wall plates constituting the earthquake-resistant wall, so the strength and rigidity are increased, and the stiffening beams are not integrally protruded from the wall plates. Stiffening beams improve stability during construction.

By erecting precast concrete wall plates having the stiffening beams in the height direction, the lateral direction, or both directions, and connecting adjacent same wall plates with connecting materials,
A seismic wall is constructed by integrating a wall plate portion and a beam portion. At this time, since the connecting members are arranged in the stiffening beam parts, the connecting members and reinforcing reinforcing bars are different from the conventional precast shear walls that are configured to keep the connecting members and reinforcing bars within the range of the wall thickness. The wall thickness is reduced, and there is no need to increase the wall thickness as was the case in the past.

(Example) The present invention will be described below with reference to the illustrated embodiments.

In the embodiment shown in Figures 1 and 2, (1) is a precast concrete wall plate of upper and lower layers, and a stiffener in the shape of dividing the girder into two, which is arranged between both wall plates, is attached to the opposite edge of the wall plate. A beam (2) is integrally provided, and each stiffening beam (2) has a beam (
A sheath tube (3) is buried that runs through the tube 2).

Then, the lower wall plate (1) is erected at a predetermined position, and an elastic connecting piece made of rubber or the like is placed at a predetermined position on the upper surface of the upper end stiffening beam (2) of the wall plate (1). The sheath/adjuster (4) is fixed with adhesive or the like, the upper layer wall plate (1) is temporarily placed on top of it, and then the steel connecting material ( 5) is inserted and tightened, then a grout material (6) is filled between the stiffening beams (2), and the connecting material (5) is further tightened to firmly connect the upper and lower wall plates.

FIG. 3 shows another embodiment of the present invention, in which the lower wall plate (
The steel connecting member (5) in 1) is fixed in advance in the stiffening beam (2) via the anchor member (7), and the connecting member (5)
Stiffening beam (2) in the upper wall plate (1) whose upper end protrudes
It is inserted into the sheath tube (3) and tightened.

In the figure, parts equivalent to those of the above embodiment are given the same reference numerals.

FIG. 4 shows still another embodiment of the present invention, in which the wall plate (1
) is located at the center of the stiffening beam (2),
In the drawings, parts equivalent to those of the above embodiments are given the same reference numerals.

FIG. 5 shows a case in which the wall plate (1) is arranged in the height direction, and FIG. 6 shows a case in which the wall plate (1) is arranged in the height direction and in the lateral direction.

It goes without saying that the present invention can also be applied to a case where the wall plate (1) is arranged laterally.

In the figure, (8) indicates a pillar. Other parts equivalent to those of the above embodiments are given the same reference numerals.

(Effects of the Invention) According to the present invention, as described above, a precast concrete wall plate integrally provided with a stiffening beam can be
Alternatively, the stability of precast concrete shear walls can be improved by building horizontally, connecting the stiffening beams of adjacent wall plates with connecting materials, and filling the gaps between the stiffening beams with grout. In addition to making the construction easier, it also allows the connecting materials and reinforcing bars to fit better without increasing the wall thickness, improving construction efficiency and economic efficiency.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional side view of the main part showing one embodiment of a precast concrete shear wall according to the present invention, Fig. 2 is a longitudinal sectional front view of the main part, and Fig. 3 is a main part showing another embodiment of the present invention. FIG. 4 is a longitudinal side view of a main part showing still another embodiment of the present invention, and FIGS. 5 and 6 are front views showing a structure constituted by earthquake-resistant walls according to the present invention, respectively. FIG. 7 is a vertical side view of the main part of a conventional precast concrete shear wall. (1)...Precast concrete wall board, (2)...
... Stiffening beam, (5) ... Connecting material, (6) ... Grout material. Agent Patent Attorney Shige Okamoto To one person outside of the text (', If'') Riri Shizuku

Claims (1)

[Claims] Precast concrete wall plates with integral stiffening beams are erected vertically and/or laterally, and the stiffening beams of adjacent wall plates are connected with connecting materials, and each stiffening beam is A precast concrete shear wall characterized by filling the gaps with grout.