JPS6144173B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection structure for PC shear walls.

Conventionally, the beam of a reinforced concrete PC shear wall has a built-in steel frame, and the connection to the column is bolted through a gusset plate, or if the beam is also made of reinforced concrete, the main reinforcement at the joint is
Many items are welded on-site. However, in these conventional examples, the amount of steel material increases, resulting in high costs.
This also led to a decline in work efficiency on site.

The present invention is aimed at eliminating the above-mentioned drawbacks, and embodiments of the present invention will be described below with reference to the drawings.

In Figures 1 and 2, a beam 2 is integrally provided at the top of a PC earthquake-resistant wall 1. In the illustrated example, four main reinforcements 3, 3a of the beam 2 are arranged, and the lower two main reinforcements 3, 3 are buried within the beam 2.
The two upper main reinforcements 3a, 3a are located above the beam 2, and a stirrup 4 is further wound around each main reinforcement.

By the way, at both ends of the lower beam main reinforcements 3, 3,
As shown in FIGS. 1 and 3, the rear portions of the reinforcing bar joints 5 and 6 are crimped. The tip ends of the reinforcing bar joints 5 and 6 protrude from both side surfaces of the wall. Further, the rear parts of reinforcing bar joints 5a, 6a having the same structure as the joints 5, 6 are attached by crimping to both ends of the upper main bars 3a, 3a. The tips of the reinforcing bars 8, 8a attached to the column steel frame 7 are inserted and crimped into the openings at the tips of the reinforcing bar joints 5, 5a on the left side of FIG. ). By this crimping, the PC shear wall 1 is supported by the column steel frame 7. In addition, the tips of the main bars 11, 11a of the beams 10 of the PC shear wall 9 adjacent to the PC shear wall 1 are inserted and crimped into the openings at the tips of the reinforcing bar joints 6, 6a on the right side (in the drawing, the ends are crimped). (This shows the state before crimping.) As a result, PC shear walls 1 and 9 are connected.

In addition, in the illustrated example, the PC shear wall 1 and the column steel frame 7 are connected by gusset plates 12 and 13, and
PC shear walls 1, 9 are gusset plates 12a, 1
4 and plate 15, respectively.

16 is a PC floor slab.

Next, the connection operation between the PC shear wall 1 and the column steel frame 7 will be explained.

First, erect the PC shear wall 1, and this wall and column steel frame 7.
gusset plates 12 and 13 are connected and fixed,
Then, the tips of the column reinforcing bars 8, 8a are inserted into the openings at the tips of the left reinforcing bar joints 5, 5a. Therefore,
The ends of the reinforcing bar joints 5, 5a are crimped using a crimping machine to connect the joints to the reinforcing bars 8, 8a, and the work of connecting the PC shear wall 1 and the column steel frame 7 is completed.

Also, the operation of connecting the PC shear walls 1 and 9 will be explained. In this case, it is the same as the above connection method,
After erecting the PC shear wall 9, insert the left ends of the main beam reinforcements 11, 11a into the reinforcing bar joints 6, 6a of the PC shear wall 1, and attach the gusset plates 12a, 14 to the plate 1.
5 and then crimping the ends of the joints, the joints 6, 6a and the beam main reinforcements 11, 11a are connected, and the PC
Shear walls 1 and 9 are connected.

Further, other embodiments of the PC shear wall will be described based on FIGS. 4 to 6.

The rear parts of reinforcing bar joints 18 and 19 are crimped to both ends of the main beam reinforcement 17 embedded in the beam 2a of the PC seismic wall 1a, and the tip end side of the reinforcing bar joint protrudes from the wall side.

As shown in FIGS. 5 and 6, the reinforcing bar joint 18 has a female thread 18a carved therein, into which a threaded rod 20 can be screwed through the opening at the tip of the joint.
A plurality of nuts 2 (two in the drawing) are attached to the threaded rod 20.
1 and 22 are attached. And this screw rod 2
0 can be screwed into the female thread 23a of the reinforcing bar joint 23 attached to the column steel frame 7 (FIG. 4). This reinforcing bar joint 23 faces the reinforcing bar joint 18 on the PC shear wall 1a side. The method for attaching the column steel frame 7 of the joint 23 is to screw the rear part of the joint onto a threaded rod 24 attached to the column steel frame and fix it with a nut 25, but this is not necessarily limited to the illustrated example. Then, both reinforcing bar joints 18 and 23 are connected via the threaded rod 20, thereby connecting the column steel frame 7 and the PC shear wall 1a.
are connected.

In FIG. 4, the reinforcing bar joint 19 on the right side also has the same configuration as the reinforcing bar joint 18, and this joint 19 can be connected to the reinforcing bar joint 26 of the adjacent PC shear wall 9a via a threaded rod 20.

In addition, there is a reinforcing bar joint 2 on the left side of the upper beam main bar 17a.
The rear part of 7 is crimped, and the tip side of this joint is threadedly connected to a threaded rod 28 attached to the column steel frame 7.
It is fixed with nut 29. Also, the beam main reinforcement 17a
At the right end is a reinforcing bar joint 3 with the same configuration as the reinforcing bar joint 19.
0 is crimped and connected via a threaded rod 20 to a reinforcing bar joint 31 at the end of the main bar of the PC shear wall 9a.

The connection operation between the PC shear wall 1a and the column steel frame 7 will be explained.

First, install the PC shear wall 1a, then connect the gusset plates 12 and 13, and then
Threaded rod 28 is screwed into joint 27 at the left end of a and fixed with nut 29. And as shown in Figure 5,
Turn the nut 22 to advance the threaded rod 20 in the direction of the arrow, screw it into the opening at the tip of the reinforcing bar joint 23,
Its forward movement is stopped in the state shown in Figure 6. Then, return the nut 22 to the position indicated by the chain line in FIG. As a result,
The PC shear wall 1 and the column steel frame 7 are connected.

In addition, the connection between PC shear walls 1a and 9a is by joint 1
This is done using the threaded rod 20 and nut 22 in the same manner as the connection between 8 and 23.

As explained above, according to the present invention, the PC shear wall and, for example, the column steel frame are connected by reinforcing bar joints, and the connection work is completed by one crimping operation or screw operation, compared to the conventional example. This reduces the amount of steel used, reduces work effort, and improves efficiency.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG.
The figure is Fig. 1 - Line sectional view, Fig. 3 is Fig. 1 -
A line sectional view, FIG. 4 is a sectional view showing another embodiment,
FIG. 5 is an enlarged sectional view of the reinforcing bar joint before connection, and FIG. 6 is an enlarged sectional view of the reinforcing bar joint after connection. 1, 1a...PC shear wall, 2, 2a...beam, 3
... Beam main reinforcement, 5, 6 ... Reinforcement joint, 7 ... Column steel frame, 8 ... Reinforcement bar, 17 ... Beam main reinforcement, 18, 19 ...
...Reinforced joint, 18a...Female thread, 20...Threaded rod, 21, 22...Nut, 23...Reinforced joint,
23a...female thread, 24...reinforcing bar.

Claims (1)

[Scope of Claims] 1. A PC earthquake-resistant wall with a beam provided on the upper part, a beam main reinforcement buried inside the beam, and a rear part of the beam main reinforcement is crimped to the end of the beam, and the tip side is crimped to the end of the beam main reinforcement. It is equipped with a reinforcing bar joint that protrudes from the side surface of the PC shear wall, and a reinforcing bar attached to a column, etc., and the reinforcing bar joint is capable of connecting with the reinforcing bar that is inserted into the opening at the tip of the joint and crimped. A connected structure of PC shear walls featuring the following. 2. A PC shear wall with a beam installed at the top, a main beam reinforcement buried inside the beam, and a rear end crimped to the end of the main beam reinforcement, with the tip side attached to the side of the PC shear wall. A reinforcing bar joint that protrudes further and has a female thread carved inside; A reinforcing bar joint that is attached to a column, etc. opposite to this reinforcing bar joint and has a female thread carved inside; and both ends are as described above. A threaded rod that can be screwed into the opening at the tip of both reinforcing bar joints and has a plurality of nuts attached to the outer periphery thereof, and both of the reinforcing bar joints can be connected via the threaded rod. Connecting structure of PC shear walls.