JPH05263471A - Column-beam joint structure for concrete-filled angular steel pipe column-steel frame beam structure - Google Patents

Abstract

PURPOSE:To improve the settlement around a stair and around the outer periphery of a building and facilitate the concrete construction and the welding of a column angular joint by arranging cross vertical diaphragms over the column capital-beam faying section and column base section of a concrete-filled angular steel pipe column, and partially welding the angular joint of the steel pipe column over the whole column length. CONSTITUTION:A pair of flange skin plates 1 are arranged in parallel, and the flange side of cross vertical diaphragms 3 is welded. Web skin plates 2 are coupled between the skin plates 1 and the cross vertical diaphragms 3, and the web side of the cross vertical diaphragms 3 is welded. An angular column is welded, and concrete 5 is filled. The cross vertical diaphragms 3 are arranged over the column capital section, column base section, and beam faying section of the concrete-filled angular steel pipe column A for reinforcement. The shearing yield strength of a column and the beam faying section is increased, and the filled concrete 5 at the column capital section and column base section area and the local buckling of the steel pipe column A can be confined.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column-beam joint structure of a rigid-frame structure made of concrete-filled rectangular steel tube columns and steel beams.

[0002]

2. Description of the Related Art Conventionally, as a method of reinforcing a joint portion of a composite structure of a concrete-filled steel pipe column a and a steel beam b, (a)
Form using the outer diaphragm c shown in FIG. 12, (b)
A type using a through diaphragm d having a circular hole shown in FIG. 13 is generally used.

In the figure, e is filled concrete. FIG. 8 shows an elevation of the conventional structure. 9 and 10 show the cross section. As a corner joint of a steel pipe column, it is common to perform full penetration welding at the stigma, column bases, and joints where severe stress is applied, and partial penetration welding is performed at the intermediate part where the stress is mild. Note that FIG.
10 and 11, a1 is a column flange, and a2 is a column web.

[0004]

The outer diaphragm type is better in filling the concrete than the through diaphragm type, but is less fit around the stairs and the outer circumference, so that the through diaphragm type is currently used. However, in the same diaphragm type, there is a problem in the filling property of concrete, especially in the corner portion of the joint.

Further, as a corner joint of a steel pipe column, since a complete penetration weld portion and a partial penetration portion weld cannot be welded continuously, a welding defect is likely to occur at the contact point, and the welding setup must be changed. Therefore, welding work is not easy. In order to improve this point, it is conceivable that the prismatic joint is partially melted over its entire length, but this is not possible with the current diaphragm type because the stress in the joint area is severe.

The present invention has been proposed in view of the problems of the above-mentioned prior art, and the purpose thereof is to provide good workability in the area around the stairs and around the outer periphery of the building with good workability, concrete construction, and steel pipe column construction. The purpose of the present invention is to provide a column-beam joint structure in a concrete-filled rectangular steel tube column / steel beam structure that can easily weld column corner joints and reduce the number of processes.

[0007]

In order to achieve the above-mentioned object, the joint structure of columns and beams in a concrete-filled rectangular steel tube column / steel beam structure according to the present invention is a concrete-filled rectangular steel tube column / steel beam structure, A cruciform vertical diaphragm is disposed over the strait beam connection and the column base of the rectangular steel pipe column, and the square joint of the steel pipe column is configured as partial penetration welding over the entire length of the column.

[0008]

According to the present invention, as described above, since the cruciform vertical diaphragm is disposed and reinforced across the stigmatic column base and the joint portion of the concrete-filled steel tubular column, the pillar and the beam are provided by the cruciform vertical diaphragm. The shear strength of the joint increases with respect to the shearing force acting on the joint from the above, and the cruciform vertical diaphragm restrains the stigma of the column and the filling concrete in the pedestal region and restrains the local buckling of the steel pipe column. Is also possible.

As a result, the corner joint of the square steel pipe column can be partially penetration welded over the entire length of the column.

[0010]

The present invention will be described below with reference to the illustrated embodiments. 4 to 7 show a method of manufacturing a cross-shaped vertical diaphragm portion of a pillar. In FIG. 4 and FIG. 5, one pair of flange skin plates 1 are installed in parallel and the flange side of the cross-shaped vertical diaphragm 3 is welded. In the figure, 4 is a backing metal. Also, a back side metal 4'of the diaphragm 3 on the web side is attached.

Next, as shown in FIGS. 6 and 7, a web skin plate 2 is fitted between the skin plate 1 and the cross-shaped diaphragm 3 and the web side of the cross-vertical diaphragm is welded. After that, the pillar angles are welded. Thus, the cross-shaped vertical diaphragm 3 is provided at the column head, column leg and beam joint of the rectangular steel pipe column A constituted by the respective skin plates 1.
Is attached and the concrete 5 is filled. In the steel pipe column A, the shear strength of the column-beam joint is increased by the cross-shaped vertical diaphragm 3, and at the same time, the restraint of the filled concrete in the column head and column base regions and the local buckling of the steel pipe column are possible. Therefore, partial penetration welding is possible over the entire length of the corner joint of the steel pipe column A.

Reference numeral B is a steel beam, 6 is a beam flange, 7 is a beam web, 8 is a gusset plate, and 9 is a high tension bolt for beam-column joining.

[0013]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, a concrete-filled rectangular steel tube column, a diaphragm around a beam-column joint in a steel column structure, and a concrete-fillable diaphragm are provided. It is a valuable product, and concrete construction is easy. In addition, since the corner joint of the steel pipe column is partially penetration welded over the entire length, the welding work is simple, defects are eliminated, and the number of processes is reduced.

[Brief description of drawings]

FIG. 1 is an elevational view showing an embodiment of a joint structure of a concrete-filled rectangular steel pipe column, a column in a steel beam structure, and a beam according to the present invention.

FIG. 2 is an arrow view of FIG.

FIG. 3 is a perspective view taken along the arrow in FIG.

FIG. 4 is a perspective view showing a manufacturing process of a steel pipe having a cruciform vertical diaphragm built therein.

5 is a vertical cross-sectional view of FIG.

FIG. 6 is a perspective view showing a next step of FIG.

7 is a vertical cross-sectional view of FIG.

FIG. 8 is an elevational view of a conventional structure.

FIG. 9 is a view from the arrow of FIG.

10 is a view taken in the direction of the arrow in FIG.

FIG. 11 is an enlarged view of the partial e in FIG.

12 (a) and 12 (b) are plan views and elevation views of a conventional column-beam joint structure having an outer diaphragm.

13A and 13B are plan and elevation views of a conventional column-beam joint structure having a through-diaphragm having a circular hole.

[Explanation of symbols]

 A Steel pipe column B Steel beam 1 Flange skin plate 2 Web skin plate 3 Cross-shaped vertical diaphragm 4 Back metal 5 Concrete 6 Beam flange 7 Beam web 8 Gusset plate 9 High tension bolt

Claims (1)

[Claims] 1. In a concrete-filled rectangular steel tubular column / steel beam structure, a cross-vertical diaphragm is disposed over the stigmatic beam joint and column leg of the rectangular steel tubular column, and the square joint of the steel tubular column is provided over the entire column length. A column-to-beam joint structure in a concrete-filled rectangular steel tubular column / steel beam structure characterized by partial penetration welding throughout.