JPH04106237A - Conjunction part stricture of post and beam - Google Patents

Abstract

PURPOSE:To simplify a conjunction part and increase the strength, by installing a beam support jointed with a steel plate on a steel member vertically arranged at the four corners of a post, in the conjunction part between a reinforced concrete post and a steel frame beam and by jointing the beam support to upper and lower main reinforcing rods of the post. CONSTITUTION:Angle steels 4 are arranged vertically at the four corners in the conjunction part between a reinforced concrete post 2 and a steel frame beam 1. And a beam support jointed with a steel plate 5 is equipped therebetween. Next, the beam support is jointed to main reinforced rods 3 and the steel frame beam 1 is installed. And then concrete is placed. In this way, the conjunction structure is simplified and the strength of the structure is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a column-beam joint structure consisting of a reinforced concrete column and a steel beam.

[Prior art and the problem to be solved by the invention] It is believed that a structure in which the compressed material columns are made of concrete and the bent materials are made of steel is a rational structure that takes advantage of the characteristics of each material. For these reasons, it is increasingly being used as a structure for column and beam frames.

However, in this type of composite structure, the challenge is to create a structure in which the bending moment from the steel beam is smoothly transmitted to the column at the joint, and to ensure that the reinforcement of the main reinforcement of the column and the filling ability of the concrete are not hindered. becomes.

In conventional structures, the steel beams pass through the joints, and the main column reinforcements are connected to the flanges of the steel beams.
There are two types of structures: one in which the steel beam is joined to metal fittings buried in the concrete of the column, and the other in which the cross section is narrowed down within the joint.In the former type of structure, part of the main column reinforcement is located at the position of the steel beam. The reinforcement is divided and arranged, and the main reinforcement of the column is discontinuous above and below the joint, so the transmission of force between the main reinforcements of the column is unclear.Also, the main reinforcement of some corners is continuous, so the main reinforcement There is a problem in that the length becomes inconsistent and the manufacturing of the main bars becomes complicated.

On the other hand, in the latter method, as a result of passing through the column main reinforcement, the transmission of force between the main reinforcements is clear, but since the cross section of the steel beam is reduced within the joint, the stiffness of the beam changes dramatically. However, there remain problems such as insufficient power transmission between columns and beams.

This invention was developed based on this background, and aims to propose a joint structure that overcomes the disadvantages of both.

[Means for Solving the Problems] In the present invention, a steel beam is arranged so as to pass through a joint, and on both sides of the steel beam, the joint is passed through the joint in the height direction and the four corners of the cross section of the column are placed on both sides of the steel beam. By placing the steel material at the position and joining the column main reinforcement to this steel material, the column main reinforcement is made continuous at the joint, and at the same time the stress is transmitted between the column and the beam, the stress is transmitted between the column main reinforcement at the joint, The mechanism will be clarified.

Furthermore, a plate is installed vertically between adjacent steel members at the upper and lower positions of the steel beam, the main column reinforcement is added to the steel member and joined to the plate, and the stress of the main column reinforcement is transmitted to the steel member via the plate. Transmits stress between the column main reinforcements above and below the joint.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment.

As shown in Figure 1, this invention places a steel beam 1 through the joint between a steel beam 1 and a reinforced concrete column 2,
The structure is such that stress is transmitted between the main column reinforcements 3, 3 above and below the joint through steel members 4, such as angles, placed at the four corners of the column cross section.

The steel beam l passes through the joint as shown in FIG.

The steel material 4 is on a plane as shown in the figure, and the reinforced concrete column 2
It is placed at the four corners of the cross section of the column, penetrating the joint in the height direction, and both ends are fixed in the concrete of the reinforced concrete column 2.

Further, as shown in FIG. 1, a plate 5 is vertically installed between adjacent steel members 4, 4 at upper and lower positions of the steel beam l, and the steel members 4, 4 are connected and restrained with each other.

The joints, that is, the column main reinforcements 3, 3 separated vertically by sandwiching the steel beam 1, are joined to the steel material 4 and the plate 5 as shown in the figure, and the stress is transmitted to each other via the steel material 4. In other words, the stress of the column main reinforcement 3 directly connected to the steel material 4 is directly transmitted to the column main reinforcement 3 on the opposite side across the joint, and the stress of the column main reinforcement 3 connected to the plate 5 is once borne by the plate 5. , the flow is dispersed to the steel members 4.4 on both sides, and is further transmitted to the column main reinforcement 3 on the opposite side.

To construct the joint, concrete for the reinforced concrete column 2 on the lower floor side is poured by burying the steel material 4 and the lower plate 5, and following the erection of the steel beam 1, the main reinforcement of the column of the pre-assembled reinforcing bar cage is placed. 3 to the steel material 4 and plate 5.

FIG. 3 shows another reinforcement arrangement state of the column main reinforcement 3, and also shows an embodiment in which an opening 5a is formed in the plate 5 to improve the circulation of the poured concrete.

〔Effect of the invention〕

This invention is as described above, and the steel beams are arranged so as to pass through the joints, and the upper and lower column main reinforcements are joined to the steel material that passes through the joints in the height direction, so the column main reinforcements sandwich the joints. The reinforcement will be placed continuously, and the force will be transmitted between the column main reinforcements through this steel material, making the transmission mechanism clear.

Furthermore, it is economical because no special hardware is required at the joint, and in addition, the concrete at the joint is surrounded and restrained by plates, which improves its strength.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a perspective view showing another embodiment. ■...Steel beam, 2...Reinforced concrete column, 3...
・Column main reinforcement, 4... Rope material, 5... Plate, 5a...
・Opening.

Claims (2)

[Claims] (1) This is a joint structure between a steel beam and a reinforced concrete column that penetrates the joint. Steel members are placed at the four corners of the cross section of the column, penetrating the joint in the vertical direction. A column-beam joint structure characterized by the fact that the main reinforcement of the column is joined. (2) A column-beam connection according to claim 1, characterized in that a plate is vertically installed between adjacent steel members at the upper and lower positions of the steel beam, and the column main reinforcement is joined to the steel members and the plate. Departmental structure.