JP2908658B2 - Connection structure of square steel column and beam - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between a square steel pipe column and a beam.

[0002]

2. Description of the Related Art Conventionally, in a connection structure between a square steel tube column or a square steel tube concrete column and an H-shaped steel beam, when external reinforcement cannot be performed, as shown in FIGS. Are used as reinforcement.

[0003]

The conventional internal diaphragm method has the following disadvantages.

(A) Since electroslag welding must be applied, the welding equipment becomes large-scale, the heat input is large, the material properties of the welded parts are deteriorated, and the welding operation is complicated.

[0005] (b) In the case of square steel tubular concrete columns, holes for placing concrete are formed in the diaphragm. Was.

A method of welding stiffeners to the inner surface of the column in the longitudinal direction has been proposed in Japanese Patent Application Laid-Open No. 48-78729, but the reinforcing effect is not sufficient, and it is necessary to weld many stiffeners in rows.

The present invention has been devised to solve these drawbacks.

[0008]

According to a first aspect of the present invention, there is provided a reinforcing member in the form of a trapezoid having a trapezoidal shape in a direction perpendicular to the axis of a column inside a portion where beams are joined, of four rectangular members constituting a rectangular steel tube column. , The trapezoidal reinforcing members are horizontally arranged so as to be in contact with each other at the four corners of the pillar, and the four strip-shaped members are assembled and welded to the pillar, and the beam is fixed to the outside of the portion where the reinforcing member is located. The main purpose is the joint structure of the square steel pipe columns and beams characterized by the following.

[0009] A second aspect of the present invention is the connection structure between a square steel pipe column and a beam according to the first aspect, wherein the four corners of the column are trapezoidal in contact with each other .
The gist of the present invention is characterized in that longitudinal ribs parallel to the axis of the column are provided at both end portions of the plate-like reinforcing member, and the joint structure between the rectangular steel tube column and the beam according to claim 1 is provided.

The operation is as follows.

(A) Since it is not necessary to apply electro-slag welding, the welding equipment does not have a large scale, the heat input is large, and the material properties of the welded portion do not deteriorate. In addition, welding work is facilitated.

(B) Further, in the case of a square steel tubular concrete column, a hole for placing concrete can be sufficiently provided, so that a sufficient filling of concrete is guaranteed.

[0013]

EXAMPLE shown in Figures 1-3, the four strip-shaped members 1 and 2 constituting the RHS Column, inside the portion to be welded by butt flanges H-shaped steel beam 5, previously When a trapezoidal plate-shaped reinforcing member 3 is welded in a direction perpendicular to the axis of the column and four strip-shaped members are welded to each other to assemble the column, the trapezoidal reinforcing member 3 is brought into contact with the four corners of the column. It is arranged horizontally. After assembling the four strip-shaped members 1 and 2 by welding to columns, an H-shaped steel beam 5 is fixed to the outside of the member having the reinforcing member 3 by welding. In addition, concrete 7 may be cast in the pillars.

In the embodiment shown in FIGS. 4 to 6, longitudinal ribs 4 are provided at both ends of the trapezoidal reinforcing member 3 to avoid stress concentration at the corners of the column.

Other configurations are the same as those of the previous embodiment.

[0016]

The effects of the present invention are as follows.

(A) The trapezoidal reinforcing member contacting the four corners of the column according to the present invention has the same operation and effect as the diaphragm,
It does not require large-scale welding equipment like the conventional inner diaphragm structure, and is easy and inexpensive.

(B) In the case of a square steel tubular concrete column, a hole is formed in the diaphragm, and the concrete filling property is good, so that the strength is high.

(C) Vertical ribs are provided at both ends of the trapezoidal reinforcing member main body to avoid concentration of stress at the corners of the column.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line BB of FIG.

3A is a plan view of a reinforcing member 3, and FIG. 3B is a front view.

FIG. 4 is a plan view of another embodiment of the present invention.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

6A is a plan view of another reinforcing member 3, and FIG. 6B is a front view.

FIG. 7 is a longitudinal sectional view of a conventional example.

FIG. 8 is a plan view of FIG. 7;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rectangular member, 2 ... Rectangular member, 3 ... trapezoidal reinforcing member, 4 ... Vertical rib, 5 ... H-shaped steel beam, 6 ... Diaphragm,
7 ... Concrete

Claims (2)

(57) [Claims] 1. A trapezoid in a direction perpendicular to an axis of a pillar inside a portion where beams are joined, of four strip-shaped members constituting a square steel tubular column.
A plate-like reinforcing member is welded, and the trapezoidal reinforcing member is horizontally arranged so as to be in contact with the four corners of the pillar, and the four strip-shaped members are assembled and welded to the pillar, and the outer side of the portion where the reinforcing member is located ,
Connection structure of square steel pipe columns and beams, characterized by fixing beams. 2. The joint structure for a square steel tube column and a beam according to claim 1, wherein longitudinal ribs parallel to the axis of the column are provided at both ends of a trapezoidal plate-like reinforcing member that contacts each other at four corners of the column. Connection structure of square steel pipe columns and beams characterized by being provided.