JPH05340033A - Manufacture of steel pipe column with outer diaphragm - Google Patents

Abstract

PURPOSE:To improve dimensional accuracy in a manufacturing process and to rationalize factory manufacture management by bending a flat steel plate, to which an outer diaphragm steel plate is unitedly attached, to form the pipe body of a steel pipe column. CONSTITUTION:First, a steel plate 21 for an outer diaphragm is formed to dimensions required for the outer diaphragm 2, and unitedly attached onto a plate face being at a beam attaching position on a flat steel plate 11 for a steel pipe column under a condition where the steel plate 21 is vertically stood up in the lateral direction of the flat steel plate 11. Next, the flat steel plate 11 is roundingly bent in its lateral direction so that a face opposite to a face where the steel plate 21 for the outer diaphragm is attached may be an inner face, and the edges 11a, 11b on both sides of the flat steel plate 11 are butt joined to form a pipe body 1. At the same time, the steel plate 21 for the outer diaphragm is also butt joined at its ends 21a, 21b to form the ring-shaped outer diaphragm 2. Finally, after a steel pipe column 1 with the outer diaphragm is completed by bending and welding, it is heat-treated for the purpose of the improvement of stress and strain.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a steel pipe column with an outer diaphragm (including a filled type steel pipe concrete column; the same applies hereinafter) used as a column for a large-scale or high-rise building.

[0002]

2. Description of the Related Art In large-scale high-rise and ultra-high-rise buildings, a beam-column structure using steel pipe columns is important. The column-beam frame structure using the steel pipe column 1 is assembled as shown in FIG. 5 (A) as an example. That is, the ring-shaped outer diaphragm 2 is attached to the beam attachment position of the steel pipe column 1, and the beam 3 is joined to the outer diaphragm 2 to assemble the column beam structure. The outer diaphragm 2 is attached to the steel pipe column 1 in a steel frame processing factory, and is manufactured as the steel pipe column 1 with an outer diaphragm shown in FIG. 5 (B). The conventional manufacturing method of the steel pipe column 1 with an outer diaphragm is to first cut out a donut-shaped outer diaphragm 2 from a vast steel plate, insert this outer diaphragm 2 from the end of the steel pipe column 1 and move it to the mounting position of the beam.
Outer diaphragm 2 by fillet welding etc. at a predetermined position
Is integrally joined to the steel pipe column 1 to complete the steel pipe column 1 with an outer diaphragm. The steel pipe column 1 with the outer diaphragm thus manufactured is carried into the construction site and constructed, whereby the steel frame work is rationalized.

[0003]

[Problems to be Solved by the Invention]
It takes a long time to cut out a donut-shaped outer diaphragm from a steel plate. The above-mentioned cutting work is usually performed by a gas fusing method or the like, but it is also difficult to ensure the dimensional accuracy of the cut surface. On the other hand, in order to move the cut-out ring-shaped outer diaphragm 2 along the steel pipe to the mounting position and to secure the integrity with the steel pipe, each of the steel pipe column 1 and the outer diaphragm 2 requires high dimensional accuracy. In addition, production management becomes complicated, and the effectiveness of reducing the number of man-hours for factory production is questioned. For example, when there is looseness due to dimensional accuracy and the like, the outer diaphragm 2 is replaced by the steel pipe pillar 1
In addition, correction means such as using a backing metal is required for accurate and high-strength welding, which is against the reduction of factory manufacturing man-hours.

Therefore, an object of the present invention is to achieve high dimensional accuracy and to rationalize factory production management.
An object of the present invention is to provide a method for manufacturing a steel pipe column with an outer diaphragm.

[0005]

As a means for solving the above-mentioned problems, the method for manufacturing a steel pipe column with an outer diaphragm according to the present invention is for steel pipe columns as shown in the examples in FIGS. The flat steel plate 11 is formed to have a thickness T and a length A required for the steel pipe column 1 and a width B substantially equal to the circumferential length of the steel pipe column 1. The steel plate 21 for the outer diaphragm is the outer diaphragm 2
Width b and thickness t required for the above and the flat steel plate for the steel pipe column 1
The length L is substantially equal to the width B of 1. The steel plate 21 for the outer diaphragm is provided on the plate surface of the flat steel plate 11 for the steel pipe column at the beam attachment position on the flat steel plate 1 for the steel pipe column.
1. Mounted integrally while standing vertically in the width direction of 1.

Next, the flat steel plate 11 for the steel pipe column is bent in a width direction so that the side opposite to the surface on which the steel plate 21 for the outer diaphragm is attached becomes the inner surface, and both side edge portions 11a thereof are bent. , 11b are butt-joined to each other to form a tubular body 1 ′. At the same time, the steel plates 21 for the outer diaphragm are integrally curved in a plane substantially parallel to the plate surface, and both ends 21a and 21b thereof are butt-joined to each other to form the ring-shaped outer diaphragm 2. To do.

According to the present invention, after the steel pipe column 1 with the outer diaphragm is completed by bending and welding, the stress
It is also characterized by performing a heat treatment for the purpose of improving the strain relation and removing the residual stress.

[0008]

Since the steel plate 21 for the outer diaphragm is integrally attached to the flat steel plate 11 for the steel pipe column, the flat steel plate 11 is bent to form the tubular body 1'of the steel pipe column 1.
At the same time, the steel plate 21 is integrally bent to form the outer diaphragm 2
Can be formed. At the stage of manufacturing and preparing the flat steel plate 11 for the steel pipe column and the steel plate 21 for the diaphragm, the dimensional accuracy of each can be secured, and the manufacturing control can be rationalized.

Steel pipe column with outer diaphragm 1 by heat treatment
Since the stress-strain relationship can be improved and residual stress can be removed, the reliability during a long service period becomes high.

[0010]

EXAMPLE An example of the present invention shown in the drawings will be described below.
FIG. 1A shows a width b (b
Is usually 120 to 150 mm) and the thickness t (t is usually 5)
A steel plate 21 for outer diaphragm prepared by cutting a steel plate or steel strip manufactured by rolling to 0 mm) to a required length L is shown. The length L is substantially equal to the circumferential length of the steel pipe column 1 (the outer diameter of the steel pipe 1 is usually 80 cm to 100 cm, so the circumferential length is about 251 cm to 314 cm).

FIG. 1B shows a thickness T required for a steel pipe column.
(T is usually about 22 mm), a flat steel plate 11 for a steel pipe column having a length A and a width B equal to the circumferential length of the steel pipe column is shown. As for the width B, the outer diameter of the steel pipe 1 is usually 80 cm to 1
Since it is 00 cm, the circumference is about 251 cm to 314 cm. The length A is about 3 m for a steel tube column with one section and about 6 m for two sections.

In FIG. 2, the steel plate 21 for the outer diaphragm prepared as described above is erected vertically on the plate surface of the flat steel plate 11 for the steel pipe column at the beam mounting position in the width direction of the flat steel plate 11. It shows the stage where they are welded together and integrally attached. Two steel plates 21 for the outer diaphragm are attached according to the positions of the upper and lower flanges of the beam steel frame (Fig. 4).
See B).

FIG. 3 shows a step in the middle of bending the flat steel plate 11 for the steel pipe column so as to be rolled in the width direction so that the side opposite to the surface on which the steel plate 21 for the outer diaphragm is attached becomes the inner surface. There is. At the same time, the steel plate 21 for the outer diaphragm is also curved in a plane parallel to the plate surface together with the flat steel plate. The bending process is advanced, and finally, both side edges 11a and 11b of the flat steel plate 11 are just butted against each other and welded to complete the tubular body 1'of the steel tubular column 1. Similarly, the steel plate 21 is finally welded with its both ends 21a and 21b just butted together to complete the ring-shaped outer diaphragm 2. For the butt welding, general flash butt welding, arc welding, electroslag welding, electrogas welding and the like are performed.

4A and 4B show a completed steel pipe column 1 with an outer diaphragm. When it is necessary to provide a straight portion 2c as a joint for the beam 3 on the outer peripheral edge of the outer diaphragm 2 as shown in FIG. However, it is also convenient to perform the forming process at the stage of preparing the steel plate 21. A gusset plate 4 for joining the web of beam steel is also attached.

Since the steel pipe column 1 with an outer diaphragm thus completed has an excessively large plastic shape as a whole, elongation at yield cannot be expected. Therefore, heat treatment is performed for the purpose of improving the stress-strain relationship and removing residual stress. In addition, distortion correction is performed to ensure a predetermined accuracy of the inner diameter, thickness, bending, etc., and if necessary, machining is performed to further improve the accuracy.

[0016]

According to the method for manufacturing a steel pipe column with an outer diaphragm according to the present invention, the dimensional accuracy of each of the flat steel plate 11 for the steel pipe column and the steel plate 21 for the outer diaphragm can be easily controlled, and bending work can be easily performed. With the accuracy control described above, it is possible to manufacture the steel pipe column 1 with an outer diaphragm having high accuracy and high quality. In addition, the number of man-hours for factory production can be reduced, and production management can be rationalized. It is also possible to improve the dimensional accuracy by applying heat treatment, machining or the like.

[Brief description of drawings]

FIG. 1A is a perspective view of a steel plate for an outer diaphragm,
(B) is a perspective view of the flat steel plate for steel pipe columns.

FIG. 2 is a perspective view of a flat steel plate for a steel pipe column to which a steel plate for an outer diaphragm is attached.

FIG. 3 is a perspective view showing a progress state of bending work.

FIG. 4A is a plan view of a steel pipe column with an outer diaphragm,
(B) is a front view of a main part of a steel pipe column.

FIG. 5 (A) is an elevation view showing a conventional beam-column structure using a steel pipe column, and FIG. 5 (B) is a perspective view of a steel pipe column with an outer diaphragm.

[Explanation of symbols]

 1 Steel Pipe Column 11 Flat Steel Plates 11a, 11b Side Edge 2 Outer Diaphragm 21a, 21b End 21 Steel Plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Makoto Hara Makoto Hara, 21-2-1 Ginza, Chuo-ku, Tokyo Stock company Takenaka Corporation Tokyo Main Store (72) Inventor Katsuyoshi Konan Ginza 8-chome, Chuo-ku, Tokyo No. 1 Incorporated Takenaka Corporation Tokyo Main Store (72) Inventor Hisashi Teramachi 8-21-1, Ginza, Chuo-ku, Tokyo Incorporated Takenaka Corporation Tokyo Main Store (72) Inventor Hideto Iifuku Tokyo Central Ginza 8-21-1, Ginza Stock Company Takenaka Corporation Tokyo Main Store

Claims (2)

[Claims] 1. A flat steel plate for a steel pipe column is formed to have a thickness and a length required for a steel pipe column and a width substantially equal to a peripheral length of the steel pipe column, and the steel plate for an outer diaphragm has a width required for an outer diaphragm. The thickness and the width of the flat steel plate for the steel pipe column are formed to be substantially equal to each other, and the steel plate for the outer diaphragm is a flat steel plate for the steel pipe column on the plate surface of the beam mounting position in the flat steel plate for the steel pipe column. Of the flat steel plate for the steel pipe column is bent in a width direction so that the surface opposite to the surface on which the steel plate for the outer diaphragm is attached becomes the inner surface. Forming a tube by processing and butt-joining both side edges of the steel sheet, and at the same time, jointly bend the steel sheets for the outer diaphragm in a plane substantially parallel to the sheet surface, and butt-join both ends. Then on the ring-shaped outer diaphragm Respectively, characterized in that forming method of the outer diaphragm with steel column. 2. A steel pipe column with an outer diaphragm is completed by bending and welding, and then heat treatment is carried out for the purpose of improving the respective stress / strain relations and removing residual stress. A method for manufacturing a steel pipe column with an outer diaphragm described in 1.