JPH06294162A - Structure of joint between steel pipe reinforced concrete column and beam - Google Patents

Abstract

PURPOSE:To improve the filling-up efficiency of concrete and to adequately ensure the strength thereof, by a method wherein an opening for filling-up of the concrete is enlarged on a diaphragm and longitudinal ribs are welded on the inside of the opening for filling-up of the concrete. CONSTITUTION:An opening, such as a circular or rectangular opening, for filling-up of concrete is perforated on a diaphragm 3. Reinforcing fixtures, each of which is formed by welding longitudinal ribs in cross shape, each are joined with the diaphragms at positions by spot welding, and at these positions corresponding thereto the flanges of beams 4 are to be weld joined with a steel square or circular pipe column 1. Part or all of the longitudinal ribs 2 may be linear weld joined with the diaphragm 3 by mounting them thereon. The longitudinal ribs 2 may also be provided at the undersurface part of the diaphragm. Joints are formed by joining the beams 4 with the steel pipe column 1 by welding, following which the steel pipe column 1 is filled with the concrete. In this way, the steel pipe column 1 is reinforced by the longitudinal ribs 2, and the opening for filling-up of the concrete can be, therefore, enlarged and the adequate strength thereof can be ensured.

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] Steel pipe concrete column and beam connection structure.

[0002]

2. Description of the Related Art A steel pipe concrete column is expected to have high yield strength and high rigidity, and is also a structural member excellent in deformability. However, regarding the joint between the steel tube concrete column and the beam,
Through-diaphragm, inner-diaphragm, and outer-diaphragm formats were used.

[0003]

However, as for the through diaphragm and the inner diaphragm, the filling property of concrete is poor, and on the other hand, the outer diaphragm type having no protrusion inside the column has a drawback that it interferes with the finishing material. In the inner diaphragm type, a hole for concrete filling is opened, but as shown in Fig. 4, it is impossible to make a large hole to secure the strength, and there is a concern about the concrete filling property at the lower end of the diaphragm. Many studies are required for the filling method.

Therefore, in the present invention, in the inner diaphragm type, the holes are enlarged and reinforced in order to improve the concrete filling property.

[0005]

[Means for Solving the Problem] A jig for piercing a hole for filling concrete in a diaphragm 3 and welding a vertical rib 2 inside the hole of the diaphragm 3 is welded inside a steel pipe column 1, Weld the flange of the beam 4 to the part and add concrete 5
To fill.

[0006]

EXAMPLE FIG. 1 shows an example of an example.

A reinforcing jig in which a cross-shaped vertical rib 2 is welded to a diaphragm 3 having a circular hole is welded to a portion of a steel pipe column 1 where a flange of a beam 4 is to be welded. A steel pipe column 1 and a beam 4 are welded to the portion to form a joint. After that, the steel pipe pillar 1 is filled with concrete.

As the holes for filling the concrete, there are various shapes other than the circular shape, and there are various shapes shown in FIGS. 2 (a), 2 (b) and 2 (c).
An example is shown in.

Further, in the example of FIGS. 1 and 2, the diaphragm 3 and the vertical rib 2 are welded at a single point at the C portion, but FIG.
In (b), the vertical rib 2 is placed on the diaphragm 3 and D
It is the example which carried out line welding at the part. (A) is an example in which only a part of the end of the vertical rib 2 is placed on the diaphragm 3, and (b) is an example in which the entire vertical rib 2 is placed on the diaphragm 3 and a concrete filling hole is cut out.

The vertical ribs 2 may be located below the diaphragm 3.

The vertical rib 2 does not necessarily have to be a cross shape, and may be composed of a plurality of plate members so as not to hinder concrete filling.

Although all the figures show examples of rectangular steel pipe columns, they can also be applied to circular steel pipe columns.

[0013]

The effect of the present invention is that since it is reinforced by the vertical ribs 2, the holes for filling the concrete are large and the filling property of the concrete is good. Further, since it is reinforced by the vertical ribs 2, sufficient strength can be secured.

[Brief description of drawings]

FIG. 1A is an example of a top view of the present invention.
(B) is an AA sectional view of FIG. 1a.

2 (a), (b) and (c) are other examples of the diaphragm 3. FIG.

3A and 3B are examples in which the vertical ribs 2 and the diaphragm 3 are line-welded. (C) is a BB sectional view of FIG. 3a.

FIG. 4 is a diagram showing a conventional inner diaphragm structure.

[Explanation of symbols]

1 ... Steel tube column, 2 ... Vertical rib, 3 ... Diaphragm, 4 ... Beam, 5 ... Concrete

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsushi Tagami 2-19-1 Tobita-cho, Chofu-shi, Tokyo Inside Kashima Construction Co., Ltd. (72) Inventor Fumitoshi Sakuramoto 2-1-11-1 Tobita, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Institute (72) Inventor Akio Tomita 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Seiichi Muramatsu 1-2-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 within Kashima Construction Co., Ltd. (72) Inventor Toshiaki Tauchi 2-19-1 Tobita, Chofu-shi, Tokyo Kashima Construction Co., Ltd.

Claims (1)

[Claims] 1. A jig made by drilling a concrete filling hole in a diaphragm 3 and welding a vertical rib 2 inside the hole of the diaphragm 3 is welded to the inside of a steel pipe column 1 at that portion. A joint structure of a steel pipe concrete column and a beam, wherein the flange of the beam 4 is welded and the concrete 5 is filled.