JPH0443131B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] Industrial Application Field The present invention relates to a method for joining precast reinforced concrete members such as columns and beams (hereinafter referred to as PC columns and PC beams).

Conventional technology Conventionally, to connect PC columns and PC beams, a cross-shaped or T-shaped connecting member is prepared in advance, and the columns and beams are connected to this. The main reinforcements were exposed at the joint side ends of the beams, and reinforcing bars were placed on these end main reinforcements at the joints to connect them.

In particular, the latter construction method is generally popular from the viewpoint of productivity in PC factories and simplification of on-site construction.

Problems to be Solved by the Invention However, with the above-mentioned conventional construction method, there are problems with the fit and joining method of the orthogonal beam main reinforcements, especially the lower end beam main reinforcements, and workability, cost, anchoring strength, etc. have not all been solved at the same time. Ta.

The present invention has been made to solve the problems of the conventional construction method described above, and its purpose is to:
It is possible to simultaneously improve productivity at PC factories, simplify on-site construction, structural strength, cost, etc.
The purpose is to provide a method for joining PC columns and beams.

[Structure of the Invention] Means for Solving the Problems The method of joining PC columns and beams of the present invention is such that a single main beam bar is passed through from the left and right PC beams into the joining space between the PC columns and the PC columns. Then, a connected PC beam is constructed by integrally connecting the left and right PC beams, with the joining side ends of these PC beams placed on the edge of the head of the PC column. The method is characterized in that, after reinforcing reinforcement is placed in the column main reinforcement within the joint space, cast-in-place concrete is placed.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In Fig. 1, numeral 1 is a PC column, the head of which is manufactured to the length that extends to the bottom end of the beam, and the leg portions of which are manufactured to the length that extends to the top of the beam.

Reference numeral 2 is a column main reinforcement, which is exposed upward from the head of the PC column 1.

3 is a PC beam, and the main beam reinforcement 4 is the left and right PC beam.
It is exposed from the beams 3, 3 into the joint space 6 with the PC column 1. The main beam reinforcement 4 is structured as a single line within the joint space 6, and is connected to the left and right PC beams 3,
3 are integrally connected to form a coupled PC beam A.

Note that the outer end of the PC beam 3 may have any length up to the joint with the adjacent column or within that length.

The PC column 1 and coupled PC beam A manufactured as described above are delivered to the site, and first, the PC column 1 is erected, and the coupled PC beam A is attached to the top of the column as shown in Figures 2 and 3. Build A.

At this time, since the exposed length of the beam main reinforcement 4 exposed in the joint space 6 is configured to be somewhat shorter than the width of the PC column 1, the left and right PC beams 3,
The joining side end 3a of No. 3 is built so as to be placed on the edge of the head of the PC column 1.

When the erection of the coupled PC beam A is completed, if necessary, insert another PC beam (not shown) from both sides from the direction orthogonal to this, and then add reinforcing bars to the main column reinforcement 2 of the PC column 1. After reinforcing 5, cast-in-place concrete 7 is placed in the joining space 6 to complete the joining.

[Effects of the invention] (1) There is no need to arrange beam reinforcement or weld on-site.

(2) Structurally, the anchorage of the main beam reinforcement is ensured, and the strength of the joint can be expected.

(3) The amount of reinforcing at joints is small, making it easier to place cast-in-place concrete, and making it easier to fit in orthogonal beams.

(4) Suitable for unidirectional construction in the girder direction or span direction in the RPC method.

(5) Since the coupled PC beam is erected with the joint side end of the PC beam placed on the edge of the head of the PC column, the left and right PC beams can be stably balanced on the PC column. It has the advantage of not requiring special shoring to support the PC beam, or requiring less shoring and less strength.

[Brief explanation of drawings]

Figure 1 is a perspective view of the PC column and coupled PC beam before they are assembled, Figure 2 is a sectional view of the joined state, and Figure 3 is a plan view. 1...PC column, 2...Column main reinforcement, 3...PC beam, 3
a...Joining side end, 4...Beam main reinforcement, 5...Reinforcement bar, 6...Joining space, 7...Cast-in-place concrete, A...Coupled PC beam.

Claims (1)

[Claims] 1 The left and right PC beams 3, 3 are integrally coupled by making the beam main reinforcement 4 exposed in the joint space 6 from the left and right PC beams 3, 3 to the PC column 1 into a single line. The coupled PC beam A is erected with the joint side end 3a of these PC beams 3, 3 placed on the edge of the head of the PC column 1, and the column in the joint space 6 is installed. A method for joining PC columns and beams, which is characterized in that after placing reinforcing bars 5 on the main bars, pouring cast-in-place concrete 7 is placed.