JP2734334B2 - Connection structure of steel pipe concrete 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 steel pipe concrete columns and beams.

[0002]

2. Description of the Related Art Conventionally, when external reinforcement cannot be performed at a connection between a steel pipe concrete column and a beam 2, an inner diaphragm 7 is used as reinforcement as shown in FIG. FIG. 4B is a sectional view taken along line BB of FIG.

[0003]

An object of the present invention is to solve the following problems of the conventional inner diaphragm.

(A) Electro-slag welding must be applied, so that the welding equipment becomes large-scale and the welding operation is complicated.

[0005] (b) Since electroslag welding must be applied, the amount of heat input is higher than that of general welding, resulting in a higher temperature, and it cannot be used for materials that are easily affected by heat, such as high-strength materials.

(C) A hole for filling concrete is made in the internal diaphragm, but a large hole was not taken, so that the question of the filling property of concrete remained.

[0007]

Means for Solving the Problems A diaphragm 3 which forms a hole in the center when the skin plate 1 'is assembled in a column shape is welded to four skin plates 1' constituting the steel pipe column 1, Vertical ribs 4 are welded to the diaphragm 3, and cylindrical vertical ribs 5 are spot-welded to the diaphragm 3 of one skin plate 1 ′ on the outer periphery of the vertical ribs 4.
4 skin plates 1 '
Is welded into a column shape, the flange of the beam 2 is welded to the portion where the diaphragm 3 is welded, and the steel pipe column 1 is filled with concrete 6.

[0008]

According to the present invention, when concrete is filled into a steel pipe concrete column, concrete is filled between the vertical ribs 4 and the vertical ribs 5 having a cylindrical shape, and the tensile stress from the beam 2 is reduced in the following order. Tell the concrete pillar web.

First, the beam is transmitted from the beam 2 to the diaphragm 3 having a triangular portion.

The power is transmitted from the diaphragm 3 to the vertical rib 4.

From the vertical ribs 4, the ribs 4 and the cylindrical vertical ribs 5
, And the stress is transmitted from the cylindrical vertical rib 5 to the web of the steel tube concrete column via the diaphragm 3 on the opposite side.

Here, it is considered that stress is transmitted from the vertical ribs 4 to the cylindrical vertical ribs 5 by the bearing pressure of concrete, but an adhesive material capable of withstanding the bearing pressure is inserted between the ribs when assembling the steel pipe. Is also possible. When the processing accuracy is good, the vertical rib 4 and the cylindrical vertical rib 5 can be directly in contact with each other.

[0013]

An embodiment will be described below with reference to FIG.

The diaphragm 3 is welded to each of the four skin plates 1 ′ constituting the steel pipe column 1, and the longitudinal ribs 4 are welded to the diaphragm 3. A cylindrical vertical rib 5 is spot-welded to the diaphragm 3 on one of the four skin plates 1 ′ in which the diaphragm 3 and the vertical rib 4 are welded. Thereafter, the four skin plates 1 ′ are assembled into a box shape and welded so that the vertical ribs 4 hold the cylindrical vertical ribs 5.
Construct pillars.

At the portion where the diaphragm 3 is welded, the beam 2
Is welded and concrete 6 is filled in the steel pipe column 1 to form a connection between the steel pipe concrete column 1 and the beam 2.

In the example shown in FIG. 1, the longitudinal ribs 4 at the portions where the flanges of the beams 2 are welded are both welded to the lower side of the diaphragm 3, but they can be welded to the upper side of the diaphragm 3, and the vertical direction can be changed. You can mix them.

FIGS. 2 and 3 show an example in which a rectangular cylindrical rib 5 is applied instead of the cylindrical vertical rib 5. FIG. 2 shows four corners of the rectangular cylindrical rib 5 formed on the skin plate 1 '. FIG. 3 shows an example in which four sides of a rectangular tubular vertical rib 5 are arranged at positions parallel to the steel pipe column 1.

[0018]

According to the present invention, since the vertical ribs also function as the diaphragm, the holes in the diaphragm can be made large and the concrete can be easily filled, and can be constructed by the conventional welding method. It is not required and no special attention has to be paid to tempered steel.

[Brief description of the drawings]

FIG. 1A is a top view of the present invention. FIG. 2B is a sectional view taken along line AA of FIG.

FIG. 2 is a diagram showing another example of the present invention.

FIG. 3 is a diagram showing another example of the present invention.

FIG. 4A is a diagram of a conventional inner diaphragm system. FIG. 4B is a cross-sectional view taken along line BB of FIG.

[Explanation of symbols]

1 ... steel pipe column, 1 '... skin plate, 2 ...
Beam, 3 ... diaphragm, 4 ... vertical rib, 5 ...
Cylindrical vertical rib, 6 ... concrete, 7 ... inner diaphragm

Claims (1)

(57) [Claims] 1. A diaphragm 3 is welded to four skin plates 1 'constituting a steel pipe column 1 so as to form a hole in the center when the skin plate 1' is assembled in a columnar shape. The vertical ribs 4 are welded.
A cylindrical vertical rib 5 is spot-welded to the diaphragm 3 of one skin plate 1 'on the outer periphery of the skin plate 1' and arranged so as to embrace the other vertical rib 4, and the four skin plates 1 'are welded in a columnar shape. A joint structure between a steel pipe concrete column and a beam, wherein a flange of the beam 2 is welded to a portion where the diaphragm 3 is welded, and the steel pipe column 1 is filled with concrete 6.