JP2751775B2 - Beam main reinforcement arrangement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcement structure of a main beam in a steel reinforced concrete structure.

[0002]

2. Description of the Related Art In a steel beam reinforced concrete (hereinafter referred to as SRC) structure, a steel tube having a closed cross section is built in a column at a beam-to-column joint, and a large beam is made of steel reinforced concrete.

[0003]

By the way, in the case of the above-mentioned structure or the embedded column base, if an attempt is made to obtain an anchoring length through a beam main reinforcement outside the steel pipe built in the SRC column, as shown in FIG. It is necessary to enlarge the width more than necessary (horizontal haunch), and it will interfere with the shaft of elevators and stairs.

[0004] Alternatively, when a hole for a beam main bar is made in a steel pipe built in the SRC column, or when the beam main bar is anchored in front of the steel pipe built in the SRC column, the strength of the SRC column is increased in the former, and the SRC is increased in the latter. The strength of the beam is reduced.

The present invention has been developed in view of the above circumstances, and has been developed to provide a reinforcement structure of a beam main reinforcing bar without unnecessarily enlarging the cross section of a member at an SRC column / beam joint and reducing the strength of columns and beams. It is intended to provide.

[0006]

In order to achieve the above object, according to the present invention, a main bar position securing plate having a main bar insertion hole is attached to a flange portion of a steel frame built in a beam, and the main bar insertion hole is inserted into the main bar insertion hole. The main beam of the beam is inserted, and the end of the main beam of the beam is butt-welded to the peripheral side surface of a steel pipe incorporated in a steel-framed reinforced concrete column.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Figure 1 shows a steel reinforced concrete column with a built-in square steel pipe and H
The joint part of the girder made of steel-framed reinforced concrete with built-in steel is shown, 1 is a built-in steel pipe, and 2 is an H-shaped steel built in the girder.

[0008] The steel pipe 1 built in the column and the H built in the beam
In the joint portion of the section steel 2, on the outer side surfaces of the upper and lower flanges 3 and 3 of the H section steel 2, horizontal oblong rectangular main reinforcing bar position securing plates 4 are provided at right angles at positions having a required interval from the joint with the column. It is stuck to. The main bar position securing plate 4 has four main bar insertion holes 5 formed in rows at the main bar placement position on the surface thereof.

A beam main bar 6 disposed above and below the H-shaped steel 2 is inserted into the main bar position securing plate 4 in the main bar insertion hole 5, and an end of the beam main bar 6 is formed on the peripheral side surface of the steel pipe column 1. Is fixed by butt welding.

[0010] The broken line in the figure indicates a concrete portion.

[0011]

As described above, the present invention provides a structure in which the cross section of the SRC beam member is not unnecessarily enlarged and the strength of the column and the beam is not reduced by butt-welding the main beam to the steel pipe built in the SRC column. It can be.

[0012] Further, since the main reinforcing bar position securing plate is attached to a required position of the flange portion of the H-shaped steel built in the beam, the position of the main reinforcing bar at the time of butt welding and the curing at the time of transportation are ensured. The improvement of the property can be expected.

[Brief description of the drawings]

FIG. 1 is a plan view showing a conventional example of a joint portion between an SRC structural column incorporating a steel pipe and an SRC structural beam incorporating an H-beam.

FIG. 2 is a front view showing a joint portion between an SRC column incorporating a steel pipe and an SRC beam incorporating an H-section steel according to the present invention.

FIG. 3 is a partially longitudinal side view showing a joint portion between an SRC column incorporating a steel pipe and an SRC beam incorporating an H-section steel according to the present invention.

[Explanation of symbols]

1 ... steel pipe built in a pillar, 2 ... H-shaped steel built in a girder, 3 ... flange, 4 ... plate for securing main bar position, 5 ...
Main bar insertion hole, 6 ... Beam main bar.

Claims (1)

(57) [Claims] In a beam reinforcement structure in which a steel reinforced concrete beam is straddled on a steel reinforced concrete column using a steel pipe and a beam reinforcement is arranged, a plate for securing a main reinforcement position having a main reinforcement insertion hole is built in the beam. A beam reinforcing bar reinforcement structure which is attached to a flange portion of a steel frame, wherein a beam reinforcing bar is inserted into the insertion hole, and an end of the beam reinforcing bar is butt-welded to a peripheral side surface of a steel pipe built in a steel reinforced concrete column.