JPH06294160A - Structure of joint between steel pipe reinforced concrete column and beam - Google Patents

Abstract

PURPOSE:To improve the filling-up efficiency of concrete, by a method wherein the inside part of a steel pipe column to be weld joined with the flanges of beams is weld joined with longitudinal ribs and diaphragms, and at the positions corresponding thereto the flanges of the beams are weld joined with the steel pipe column, following which the steel pipe column is filled with the concrete. CONSTITUTION:Reinforcing fixtures, each of which is formed by joining longitudinal ribs 2 with a diaphragm 3 having a round opening by welding, are weld joined with the inside part of a steel pipe column 1 and at the positions corresponding thereto the flanges of beams 4 for the steel pipe column 1 are to be welded. After that, at these positions, the flanges of the beams 4 are weld joined with the steel pipe column 1 and a joint is formed, following which the steel pipe column 1 is filled with concrete 5. Since the strength of the diaphragm 3 having a large opening is not enough, the steel pipe column 1 is reinforced so that internal and eternal stress thereagainst can be distributed by the longitudinal ribs 2. In this way, the strength of the steel pipe column 1 is adequately ensured and the filling-up efficiency of the concrete can be improved by enlarging the opening for the filling-up of the concrete.

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 types were used.

[0003]

However, as for the through diaphragm and the inner diaphragm, the filling property of the 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 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 Problems A hole for concrete filling is made in a diaphragm 3 and welded inside a steel pipe column 1.
Further, a vertical rib is installed on the inside of the steel pipe to which the flange of the beam 4 is attached, the flange of the beam 4 is welded to this portion, and concrete 5 is filled.

[0006]

EXAMPLE FIG. 1 shows an example of an example.

Beam 4 of diaphragm 3 having a circular hole
The reinforcing jig in which the vertical ribs 2 are welded to the portion where the flange is welded is welded to the portion where the flange of the beam 4 of the steel pipe column 1 is to be welded. The steel pipe column 1 and the beam 4 are welded at this 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.

In the example of FIGS. 1 and 2, the vertical rib 2 has a shape in which the diaphragm 3 is vertically sandwiched.
(A) is an example in which the vertical rib 2 is welded to the inside of the two diaphragms 3 to form a jig, and (b) is an example to be welded to the outside of the two diaphragms 3.

The vertical ribs 2 do not necessarily have to be four, and may be composed of a plurality of plate members so as not to hinder concrete filling.

The vertical ribs are obtained by reinforcing the steel pipe so that the deficiency of the yield strength of the diaphragm having a large hole can be taken by the internal and external resistance of the steel pipe.

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 a diagram showing 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 diagrams showing another example of the diaphragm 3. FIG.

FIG. 3A is a diagram showing an example of a cross-sectional view taken along the line BB in FIG. 2A, in which the vertical rib 2 is welded to the inside of two diaphragms 3 and FIG. 3B is welded to the outside.

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

[Explanation of symbols]

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

Claims (1)

[Claims] 1. A steel pipe pillar 1 to which a flange of a beam 4 is to be welded is welded with a diaphragm 3 having a hole for concrete filling, and a vertical rib is attached to the inside of the steel pipe to which the flange of the beam is attached. , Weld the flange of the beam 4 to the part,
A joint structure of steel-tube concrete columns and beams characterized by being filled with concrete.