JPS5829958A - Joint method of earthquake-proof wall made of precast concrete - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a precast concrete 1lliiiI# quake wall in a prefabricated construction method such as the H-PC construction method.

A precast concrete shear wall that can be expected to have the same strength and toughness as a multi-layer shear wall made of cast-in-place concrete that is continuously formed in the vertical direction by integrating the lower part of the wall. It provides joint construction method.

In general, regarding the strength of high-rise independent continuous *1 blind walls of RC construction, those that are integrally molded continuously in the northward direction are sufficient for a reinforced concrete wall frame that undergoes bending deformation as shown in Figure 1). However, on the contrary, a seismic wall surrounded by a frame (conventional multilayer shear walls made of precast concrete can be considered as such a structure. - Wheat undergoes shear deformation and has poor flexibility.While the former is a bending deformation type, the V type is a shear deformation type.

Therefore, when constructing a continuous wall with mechanical properties similar to a vertically continuous shear wall made of cast-in-place concrete using precast concrete slabs, the toughness of the precast concrete shear wall must be ensured. It is necessary to make a precast concrete version J2.

The construction method must be able to achieve axial tensile strength corresponding to the bending strength so that bending strength can be expected even at the joints between the precast concrete slabs as a continuous body.

The joint construction method for precast concrete shear walls according to the present invention was developed from this perspective.
A steel frame is buried around the precast concrete slab with its corners separated from each other, and reinforcing reinforcing bars or steel frame places are installed inside the precast concrete slab, with both ends of the steel frame separated from each other. Made of precast concrete that is fixed to the frame
A feature is that the l1it shear wall is connected to the column and another precast concrete shear wall located vertically adjacent to it via a joint provided in the steel frame.

Embodiments of the present invention will be described below based on the drawings.

Figures 2 to 4 show an example of a shear wall A made of precast concrete; 1 is a precast concrete version;
2... is a steel frame made of flat steel buried in the four sides of the precast concrete plate 1 with the corners cut out, and each steel frame 2... is a steel plate (
Alternatively, reinforcing bars may be bent into an appropriate shape. )
A large number of joint parts 3a..., 5k...,
3c... 3d... are provided in a protruding manner by means such as bath contact.

In addition, among the steel frames 2..., the vertical steel frames located on both the left and right sides are longer than the top and bottom of the precast concrete slab 1, and their upper and lower ends are longer than the precast concrete slab 1. These protruding parts 2a protrude from the top and bottom of the remote, and these protruding parts 2a allow vertical 'i! It is constructed so that the i'4 frame 2 and the manufacturing equipment 2 can be connected in bath contact. 4...
- is a vertical and horizontal lattice wall reinforcement, 5... is a single iron stone place consisting of main reinforcement and hoop reinforcement, these 4..., 5...
This constitutes an example of the above-mentioned reinforcement reinforcing bar group. Then, as shown in Fig. 8, this reinforcing reinforcing bar group is directly attached to the steel frame 2... It is fixed to the steel frame 2 by suitable means such as bath contact.

The above precast concrete 1-shake wall A is the 5th
As shown in the figure, it is used as a single sheet/set, and one screen curtain wall A, A placed at a predetermined position, is welded together through joint parts 3b facing each other, and bolts and nuts are attached. etc., and the column steel frame B is connected to the joint part 3 to the gauze plate which is fixed in advance to a predetermined position of the column steel frame B.
It is connected by welding, bolts, nuts, etc. through #..., and welded to the upper end of the lower floor shear wall A..., which becomes the beam member, through joint parts 3d..., 5e... At the same time, the protrusions 2a of the vertical steel frames 2 are joined together by welding.

In addition, pillar concrete C1 floor concrete, shear wall A, A
The concrete for the vertical joints will be poured on-site. 6...
・ indicates slab reinforcement, 7... indicates column reinforcement, and 8... indicates hoop reinforcement.

Fig. 6 to Fig. 8 show another embodiment, in which the joint portion 3a for the column iron %B is welded to the steel frame 2 located on one side of the precast concrete slab 1. It consists of a coupler, and is characterized in that one end of the screw iron 69 inserted through the web of the column steel frame H is screwed into the coupler, and the other end is tightened and fixed with a fixing nut 10. In addition, the steel frame 2 on the side where the coupler is welded
Although the cross section is approximately square in shape, it may also be made of flat steel.
A steel material having a substantially T-shape on the horizontal # side may also be used.

The other configurations are the same as those in the previous embodiment, so explanations will be omitted.

FIG. 9 shows another embodiment, which is characterized in that the flask 2 is made of a single-shaped steel material, and the couplers forming the joint portion 3m facing the steel column B# are arranged in a line. The other configurations are the same as the actual examples shown in FIGS. 6 to 8.

Fig. 10 shows another embodiment, in which a steel frame place 11 made of flat steel is buried in a precast concrete slab 1 with its wide plate surface perpendicular to the wall surface. It is characterized in that both ends are fixed to steel frames 2 located above and below (or on the left and right) of the precast concrete slab 1 by means such as welding.

11 and 12 show different embodiments, and the embodiment shown in FIG. 11 is characterized in that the wall reinforcements 4 are arranged in a diagonal grid pattern 6 and fixed to the W4 frame 2. The embodiment shown in FIG. 12 is characterized in that the wall reinforcements 4 are arranged in a vertical and horizontal lattice pattern 6 and fixed to the steel frame 2.

In addition, in FIGS. 8 to 12, the joint part to the column steel frame B is shown as cup two, but the joint part is made of flat steel as in the case of FIGS. 1 to 4. S
-... may be configured.

The connection between the upper and lower precast concrete shear walls is 9 each! In addition to welding as in the embodiment, the following methods may be used.

That is, as shown in FIG. 18, the joint parts 3g and 5d are welded to the S frame 2... and are made of round steel plates, each plate is connected with bolts and nuts 12, and the longitudinal steel The protruding portions 2# of the frames 2 may be connected to the splint plate 13 with bolts and nuts 14.

In addition, instead of the steel plate described in E, as shown in Fig. 14, the vertical walls 6 (exiting the deformed reinforcing bars) 4... are extended, and both their north ends are attached to the precast concrete plate 1. Holes 15 provided in steel frames 2 located above and below...
・Protruding portions 5c, 5 of the wall reinforcements 4 of the precast concrete shear wall, which are arranged in contact with # above and below, and are arranged in contact with # above and below.
d to dar-y-7eQ')-, -y'-, which consists of a steel sleeve that can be fitted onto one wall reinforcement, and one wall that is inserted into the sleeve from the outside of the sleeve. It may be mechanically connected by a) 16 consisting of a wedge press-fitted between the striations 4 and 4. Although not shown, instead of m-Ea±;↓, a crimp joint tube may be used in which the steel sleeve is tightened and crimped from -H.

In addition, in each of the examples described above, a precast concrete shear wall A made of 11 pieces is used as a set, but the same method can be applied to a shear wall made of 7 pieces of precast concrete that does not have such a divided structure. Of course.

The present invention has achieved this structure by fixing reinforcing reinforcing bars or steel frame places buried inside a precast concrete slab to a steel frame provided at the edge of the precast concrete slab, and Using the frame as a medium, the columns and other precast concrete located adjacent to the bottom! ! In order to connect to the shear wall, we can use strong connection methods with large tensile strength such as welding, bolts/nuts, cup-to-bolts and threaded reinforcing bars, etc. Furthermore, since the steel frame has its corners separated from each other, it is possible to use concrete It does not interfere with the deformation of the parts, and it does not have a structure surrounded by a frame.

Therefore, the precast concrete slab under L is integrated, and the bending deformation type has high toughness and sufficient yield strength, which has the same mechanical properties as when cast-in-place concrete is integrally molded in the vertical direction. It is possible to realize a continuous shear wall with multiple layers.

[Brief explanation of the drawing]

Figures 1 (u) and (b) are explanatory diagrams of the mechanical properties of multi-story shear walls, and Figures 2 and subsequent figures show embodiments of the present invention. , □8e□, Figure 1 is a partially cutaway perspective view of the main part,
Figure 5 is a schematic front view showing a joined state, Figures 6 and 7 are a front view showing another embodiment and a schematic front view showing a joined state, and Figure 8 is a schematic front view showing the main parts in Figure 7. An enlarged cross-sectional view, FIG. 9 is a cross-sectional view of main parts showing another embodiment, and FIGS.
2 is a partially cutaway perspective view showing another embodiment, and FIGS. 18 and 14 are longitudinal cross-sectional views of the bottom part showing different embodiments. 1... Precast concrete plate, 2... Steel frame, B ' * B '' e B ' e 6 '
... joint part, 4 ... wall reinforcement, 5 ... reinforcing bar place, 11 ... steel frame place. Figure 13 Δ Figure 14 Procedural amendment (voluntary) November 1980 Commissioner of the Japan Patent Office Mr. 1. Indication of the case 1988 Patent application No. 129133 2. Title of invention Two-cast concrete resistant IIL microscope 3. Relationship with the case of the person making the amendment Patent applicant 5. Date of the amendment order 61. Number of inventions increased by amendment 1<lJ, ['4S l 4 l'''; l f Attachment 0
) jM ',) M I' iE t 6゜Figure 5Figure 7

Claims (1)

[Claims] A steel frame is buried around the precast concrete slab with its corner parts separated from each other, and reinforcing reinforcing bars or steel frame places are placed inside the precast concrete slab, with both ends of the steel frame separated from each other. A precast concrete shear wall fixedly embedded in the frame is connected to the column and another precast concrete shear wall located vertically adjacent to the steel frame Cζ through the joint section provided with the steel frame Cζ. A joint construction method for precast concrete shear walls, which is characterized by joining to the S wall.