JPS6320973B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for joining columns and beams in a rigid frame structure made of precast reinforced concrete. bent into the column part, and fit a perforated metal plate over each exposed end of both main reinforcements to focus both main reinforcements,
The feature is that column concrete is then poured, and its purpose is to create an improved column-beam joint in a precast reinforced concrete structure with a simple structure and high structural reliability. The point is that it provides a joining method.

In the present invention, as described above, when connecting the columns and beams by anchoring the main reinforcements of continuous precast concrete beams in the columns in a precast reinforced concrete rigid frame structure, the precast concrete beams facing each other at the column-beam joint are The exposed ends of each main reinforcement were bent into the column so that they were parallel to each other, and a perforated metal plate was fitted across each exposed end of both main reinforcements to bring them together, resulting in a column-beam connection. This avoids crossing of the main reinforcements of each beam within the space, and significantly simplifies the manufacture and erection of members.

In the present invention, as described above, the exposed ends of the main reinforcements of the precast concrete beams facing each other at the column-beam joint are bent into the column so as to be parallel to each other, and a perforated metal plate is fitted between the two. After converging the exposed ends of both main reinforcements, column concrete was poured, and the exposed ends of each of the beam main reinforcements were anchored in the concrete to form a joint between the columns and beams. The hole metal plate restrains the anchoring concrete to the bent anchorage part of the beam main reinforcement at the column-beam joint, increases the attachment strength, compensates for the lack of anchorage depth of the beam main reinforcement, and further improves the anchoring depth of the beam main reinforcement. A perforated metal plate is fitted across the parallel exposed ends of each of the main reinforcements of the opposing precast concrete beams in the column, and the exposed ends of both main reinforcements are focused. By directly connecting the tensile forces of the main reinforcements at the bent portions, a rigid joint between the columns and beams is constructed.

In this way, the beam main reinforcement can be anchored in the column concrete using the perforated metal plate, and an anchoring part with sufficient strength can be constructed. However, the dimensions and shape of the perforated metal plate are By adjusting the amount of deformation of the anchorage, and by adjusting the rigidity of the members, stress concentration in the members can be avoided and the structural characteristics of the entire building can be improved.

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

A is a precast concrete beam, B is a rectangular cylindrical precast concrete formwork for driving columns, and the joint ends of the beam A are mounted on the four upper sides of the formwork B, respectively.

The exposed ends of the main beam reinforcements 1 in the opposing beams B are vertically curved so as to be close to and parallel to each other above the formwork B.

Reference numeral 2 denotes a perforated metal plate with a through hole 2a in the center, which is fitted between the vertical bent portions 1a of the exposed ends of the main reinforcements 1 in the opposing beams A to focus the main reinforcements 1. , Then, column concrete is poured in the portions of the formwork B and on the formwork B surrounded by the beams A, and the exposed ends of the main reinforcements 1 are anchored to the concrete, thereby increasing the rigidity of the column and beam. This constitutes a joint.

At this time, the perforated metal plate 2 restrains the anchoring concrete portion to the main reinforcement 1 to increase the attachment strength, compensate for the lack of anchorage depth of the main reinforcement 1, and further acts on the main reinforcement 1. The tensile force T is directly connected to prevent the concrete portions surrounded by the beams A from splitting, thereby forming a rigid joint.

Further, by adjusting the size, shape, etc. of the perforated metal plate 2, the degree of deformation thereof can be adjusted, and the rigidity of the member can be controlled to avoid stress concentration in the member and improve the structural characteristics of the entire building.

Note that 3 in the figure is a slab reinforcement, and 4 is a column reinforcement.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of drawings]

Figures 1 and 2 are a cross-sectional plan view and a longitudinal side view showing an embodiment of the method for joining columns and beams in a precast reinforced concrete structure according to the present invention, respectively, and Figure 3 is a plane view of a perforated metal plate. It is a diagram. A... Precast concrete beam, B... Precast concrete column formwork, 1... Beam main reinforcement,
1a... Vertical bent portion of the exposed end of the beam main reinforcement, 2... Perforated metal plate, 2a... Through hole.

Claims (1)

[Claims] 1. Bend the exposed ends of the main reinforcements of the opposing precast concrete beams into the column-beam joint so that they are parallel to each other at the column-beam joint, and fit a perforated metal plate across each exposed end of both main reinforcements. 1. A method for joining columns and beams in a precast reinforced concrete structure, characterized in that both main reinforcements are bundled together, and then the column concrete is poured.