JPH0721681Y2 - Connection structure of precast concrete beams - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a connecting portion structure of precast concrete beams in a multi-storey building.

[0002]

2. Description of the Related Art Conventionally, when connecting precast concrete beams (hereinafter referred to as PC beams) between columns or on columns, existing columns 1 as shown in FIG.
The PC beams 2A and 2B to be connected to each other are placed in contact with each other with their end faces facing each other, and the connecting main bars 3A and 3B are projected from the end faces of the respective PC beams so as to face each other. This is connected by welding 4 and packed concrete 5
Method for driving by in-situ driving or inserting the connecting main bars 3A and 3B into the sleeve type joint 6 as shown in FIG.
A method is used in which a curable resin filler is filled in the joint 6 to connect the connecting main bars 3A and 3B.

[0003]

[Problems to be Solved by the Invention] Conventional PC as described above
In the beam connection structure, there is a problem that the connection work of the connection main bar requires a lot of work, and the work cannot be done unless a skilled engineer is used, and the strength after connection is not sufficient. .

In view of the above conventional problems, the present invention has an object to provide a structure for connecting a PC beam which can be simply and surely connected without requiring skill to connect the connecting main bars between the PC beams. It is a thing.

[0005]

The features of the present invention for solving the above-mentioned conventional problems and achieving the intended purpose are as follows.
A precast formed by projecting the tips of main bars from the respective end surfaces of a pair of precast concrete beams whose end surfaces face each other, connecting the main bars facing each other, and placing a filling concrete between the facing end surfaces. In a connecting portion structure of concrete beams, plate-shaped pressure-resistant plates are respectively fitted to connecting main bars which are arranged to face each other, and the pressure-resistant plates are respectively prevented from coming off in the axial direction by nuts screwed onto the main bars. And the pressure-resistant plates are connected by a plurality of connecting bolts.

[0006]

In the connection structure of the precast concrete beam of the present invention, the pressure-resistant plates are attached to the respective main bars by retaining the nuts at the time of construction, and bolts are stretched between the pressure-resistant plates to tighten them. The tension is exerted between the main bars, so that the main bars can be connected to each other without slack, and the PC beams can be firmly integrated by embedding the main bars and pouring the filling concrete.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows a cross section of a connecting structure portion according to the present invention. In the figure, 10 is a pillar, 11A,
11B is a P that is face-to-face in a butt arrangement on the pillar 10.
It is a C-beam. The main bars 12A, 12B for connection are projected from the end faces of both the PC beams 11A, 11B so as to be in abutting arrangement with each other.
The spaces are connected by connecting materials.

The connecting member is a pair of pressure resistant plates 13A, 1A.
3B, nuts 14A and 14 for preventing the main bars from slipping off
B, bolt 1 that connects both pressure plates 13A, 13B
5, 15 and a nut 16A for preventing the bolt from coming off,
16B and. Both pressure plates 13A,
13B, the main muscle insertion holes 17A, 1
7B is opened through, and a pair of bolt insertion holes 18A, 18A, 18B, 18B are opened through on both sides thereof. The main bars 12A and 12B are inserted into the main bar insertion holes 17A and 17B, respectively, and the nut 14
By screwing A and 14B, the main bars 12A and 12
B to prevent the pressure-resistant plates 13A and 13B from coming off, and to insert the bolts 15 into the bolt insertion holes 18A and 18B of the pressure-resistant plates 13A and 13B, and screw nuts 16A and 16B at both ends thereof. By both main muscles 1
2A and 12B are connected. The main reinforcements 12A and 12B and the connection fittings 13 connected in this way are embedded, and a filling concrete 19 is placed between the PC beams 11A and 11B on the pillar 10.

At the time of construction of this connecting portion, FIG.
As shown in, each main beam 12A of both PC beams 11A and 11B,
The pressure-resistant plates 13A and 13B are attached to 12B, respectively, and the nuts 14A and 14B are used to prevent them from coming off.
After the C-beams 12A and 12B are installed at predetermined positions, the pressure-resistant plate 13A or 13B is retracted as shown in FIG. 3 (B), and the bolt insertion holes 18A and 18B of both pressure-resistant plates.
The bolt 15 is inserted through the bolt 15, and thereafter, as shown in FIG. 3C, nuts 16A and 16B are screwed into both ends of the bolt 15 and tightened between the pressure-resistant plates 13A and 13B in the pulling direction. After connecting the main bars 12A and 12B in this manner, the filling concrete 19 is cast on site.

In the above-described embodiment, both P's are placed on the pillar 10.
Although the case where the C beams 11A and 11B are connected to each other is shown, as shown in FIG. 4, the PC beams 11A integrally projected from the column 10 are shown.
The same can be done when the PC beam 11B is connected to.

[0012]

As described above, the PC beam connecting portion structure of the present invention does not require any skill because the pressure-resistant plates mounted on both main bars are fastened with bolts to connect the main bars. There is an effect that the work can be performed, the connection can be performed without any trouble even if the orientation of the connection main bars is slightly increased or the installation is twisted, and the structure is simple, so that the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing the outline of the entire structure of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main bar connecting member used in the present invention.

3 (A) to (C) are plan views showing a main muscle connecting step.

FIG. 4 is a cross-sectional view showing the outline of the entire structure of another embodiment of the present invention.

FIG. 5 is a sectional view of an embodiment of the prior art.

FIG. 6 is a sectional view of another example of the prior art.

[Explanation of symbols]

 10 columns 11A, 11B PC beams 12A, 12B Main bars 13A, 13B Pressure-resistant plates 14A, 14B, 16A, 16B Nuts 15 Bolts 17A, 17B Main bar insertion holes 18A, 18B Bolt insertion holes 19 Filled concrete

Claims (1)

[Scope of utility model registration request] 1. A pair of precast concrete beams whose end faces are arranged to face each other are made to project the tips of the main reinforcements from the respective opposite end faces, connect the mutually facing main reinforcements to each other, and fill the filling space between the opposite end faces. In the connection part structure of the precast concrete beam to be installed,
A plate-shaped pressure-resistant plate is fitted into each of the connecting main bars arranged to face each other, and the pressure-resistant plates are respectively prevented from coming off in the axial direction by nuts screwed into the main bars. A connecting portion structure of precast concrete beams, characterized in that the plates are connected by a plurality of connecting bolts.