JPH017761Y2 - - Google Patents

Description

[Detailed description of the idea] This idea concerns the improvement of the joints between precast concrete columns and beams.

Figures 1 and 2 show the joints of conventional precast concrete columns and beams, and reinforcement is placed on a pair of beams B and B, which are mounted on column A so as to face each other with a gap between them. The protruding ends C' of the lower main reinforcing bars C made of perforated steel etc. are curved to face each other with an interval within the panel zone as shown in Fig. Concrete is placed so as to overlap within the zone, and the protruding end portion is anchored within the poured concrete.

However, the joining apparatus shown in FIG. 1 has a limit in terms of proof strength, and the joining apparatus shown in FIG. 2 has a limit in terms of the number of reinforcements.

For this reason, measures such as increasing the width of the beam are taken when it is unavoidable for structural reasons. In addition, especially in the joining device shown in Figure 2, the main beam reinforcements overlap in a plane within the panel zone, which not only makes it difficult to secure sufficient reinforcement spacing, but also makes it difficult to maintain adequate reinforcement spacing when manufacturing precast concrete members or on-site. A high degree of precision is also required during construction.

This project was proposed to solve these problems, and consists of a pair of precast concrete beams whose lower end main reinforcements are made of wire rope, which are placed opposite each other with a gap above the head of the precast concrete column. A column and beam joining device characterized in that the wire ropes are mounted on a rack and the protruding ends of the lower main reinforcements of the wire ropes of both the beams are anchored in the joint space formed between the two beams and the columns. It is something.

As mentioned above, in this project, the main reinforcement at the lower end of a pair of precast concrete beams mounted facing each other with a gap between the heads of the precast concrete columns is replaced with high-rigidity reinforcing bars such as conventional round steel. It is constructed of a flexible wire rope instead of a wire rope, and therefore, the protruding end of the lower end main reinforcement of the wire rope facing into the joint space formed between the two beams and the column head can be attached to a wire clip or the like. Therefore, they can be easily joined, and since the protruding ends are flexible, there will be no interference with the assembly work due to overlap or contact between the protruding ends, making the work easy. Become.

In this way, the wire rope is used as the main reinforcement at the lower end of the beam, and by utilizing the flexibility of the wire rope, the lower end of the beam made of the wire rope is reinforced in the limited space of the column-beam intersection. This ensures a sufficient anchorage length for the main reinforcement and enables the main reinforcement at the lower end of the beam to be anchored within the column-beam joint space.

According to the present invention, as mentioned above, by constructing the main reinforcement at the lower end of the precast concrete beam from a flexible wire rope, the joining performance and workability of the protruding end are significantly improved. The degree of freedom in reinforcement arrangement increases, and it becomes possible to increase the amount of reinforcement without increasing the beam width as necessary.

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

Reference numeral 1 denotes a precast concrete beam, the main reinforcement at the lower end of which is composed of a wire rope 2 having the same strength as a conventional reinforcing bar made of round steel or the like.

The pair of beams 1, 1 are mounted on the head of the precast concrete column 3 so as to face each other with a gap between them, and face into the joint space formed between the column 3 and the beams 1, 1. The protruding ends 2a of the wire ropes 2 constituting the lower main reinforcing bars of each beam 1 are connected with wire clips 4 as shown in FIG.
As shown in FIG. 4, they are bent so as to overlap each other, and joint concrete is placed in the space,
The protruding end of the wire rope 2 is anchored to the poured concrete to join the pillar 3 and the beams 1, 1.

[Brief explanation of the drawing]

1 and 2 are longitudinal sectional views showing a conventional beam-column joining device, respectively, and FIG. 3 and 4 are longitudinal sectional views showing respective embodiments of the beam-column joining device according to the present invention. . 1... Precast concrete beam, 2... Wire rope, 2a... Protruding end of wire rope,
3...Precast concrete column.

Claims (1)

[Scope of utility model registration request] A pair of precast concrete beams whose lower end main reinforcements are made of wire rope are mounted on the head of a precast concrete column so as to face each other with a gap between them, and the protruding ends of the wire rope lower end main reinforcements of both beams are What is claimed is: 1. A beam-column joining device, characterized in that the beam-column is anchored in a joint space formed between the two beams and the column.