JP3079333B2 - Manufacturing method of steel pipe column with outer diaphragm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In large-scale high-rise and super-high-rise buildings, a beam-to-column frame using steel pipe columns is important. A beam-column frame using the steel pipe columns 1 is assembled as an example as shown in FIG. That is, a ring-shaped outer diaphragm 2 is attached to a beam attachment position of a steel pipe column 1, and a beam 3 is joined to the outer diaphragm 2 to assemble a column-beam frame. The attachment of the outer diaphragm 2 to the steel pipe column 1 is performed in a steel processing factory, and is manufactured as a steel pipe column 1 with an outer diaphragm shown in FIG. The conventional manufacturing method of the steel pipe column 1 with an outer diaphragm is as follows. First, a donut-shaped outer diaphragm 2 is cut out from a vast steel plate, and this outer diaphragm 2 is inserted from an end of the steel pipe column 1 and moved to a beam mounting position.
At a predetermined position, the outer diaphragm 2 is formed by fillet welding or the like.
Is integrally joined to the steel pipe column 1 to complete the steel pipe column 1 with the outer diaphragm. The steel pipe column 1 with the outer diaphragm manufactured in this manner is carried into a construction site to perform construction, thereby rationalizing steel work.

[0003]

[Problems to be solved by the present invention]
It takes a long time to cut out a donut-shaped outer diaphragm from a steel plate. The above-mentioned cutting operation 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 ensure the integrity with the steel pipe, high dimensional accuracy is required for each of the steel pipe column 1 and the outer diaphragm 2. In addition, the production management becomes complicated, and the effectiveness of reducing the number of man-hours for factory production is questioned. For example, when the dimensional accuracy is rough and there is play, etc., the outer diaphragm 2 is
Correction means such as the use of a backing metal for accurate and high-strength welding is required, which is against the reduction in the number of man-hours for factory production.

Accordingly, an object of the present invention is to achieve high dimensional accuracy and rationalization of 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, a method of manufacturing a steel pipe column with an outer diaphragm according to the present invention is, as shown in FIGS. 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 circumference of the steel pipe column 1. The steel plate 21 for the outer diaphragm is the outer diaphragm 2
Width and thickness t required for the steel plate and the flat steel plate 1 for the steel pipe column
It is formed to have a length L substantially equal to the width B of 1. Then, the steel plate 21 for the outer diaphragm is placed on the plate surface at the beam mounting position in the flat steel plate 11 for the steel pipe column.
1 and integrally attached in a state of standing vertically in the width direction.

Next, the flat steel plate 11 for the steel pipe column is bent so as to be rounded in the width direction so that the side opposite to the surface on which the steel plate 21 for the outer diaphragm 21 is attached is an inner surface, and both side edges 11a are formed. , 11b are butt-joined to form a tube 1 '. At the same time, the steel plate 21 for the outer diaphragm is also united and bent in a plane substantially parallel to the plate surface, and its both ends 21a, 21b are butt-joined to form the ring-shaped outer diaphragm 2. I do.

[0007] The present invention also provides a steel pipe column 1 having an outer diaphragm by bending and welding.
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 by bending.
At the same time, the steel plate 21 is bent together to form the outer diaphragm 2.
Can be formed. At the stage of producing 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 ensured, and the production management can be rationalized.

[0009] Steel pipe column 1 with outer diaphragm by heat treatment
Can be improved and the residual stress can be removed, so that the reliability during a long service period can be improved.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 1A shows a width b (b) required for the outer diaphragm 2.
Is usually 120 to 150 mm) and the thickness t (t is usually 5
2 shows a steel plate 21 for an outer diaphragm prepared by cutting a steel plate or a steel strip roll-manufactured to about 0 mm) into a required length L. The length L is substantially equal to the circumference of the steel pipe column 1 (the outer diameter of the steel pipe 1 is usually 80 cm to 100 cm, so the circumference 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) and shows a flat steel plate 11 for a steel pipe column formed with a length A and a width B equal to the circumference of the steel column. The width B is such that the outer diameter of the steel pipe 1 is usually 80 cm to 1 cm.
Since it is 00 cm, the circumference is about 251 cm to 314 cm. The length A is about 3 m for a one-section steel pipe column and about 6 m for a two-section steel pipe column.

FIG. 2 shows that the steel plate 21 for the outer diaphragm prepared as described above stands upright on the plate surface at the beam mounting position of the flat steel plate 11 for the steel pipe column in the width direction of the flat steel plate 11. The figure shows a stage where they are welded together and attached integrally. Two steel plates 21 for the outer diaphragm are mounted in accordance with the positions of the upper and lower flanges of the beam steel frame (FIG. 4).
B).

FIG. 3 shows a stage in the course 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 21 is attached is an inner surface. I have. At the same time, the steel plate 21 for the outer diaphragm is also united with the flat steel plate and curved in a plane parallel to the plate surface. By proceeding with the above-mentioned bending, finally, both side edges 11a and 11b of the flat steel plate 11 are butted and welded to complete the tube 1 'of the steel pipe column 1. Similarly, the steel plate 21 is finally welded with its both ends 21a, 21b exactly butted against each other to complete the ring-shaped outer diaphragm 2. For the butt welding, general flash butt welding, arc welding, electroslag welding, electrogas welding, or the like is performed.

FIGS. 4A and 4B show the completed steel column 1 having an outer diaphragm. When it is necessary to provide a straight portion 2c at the outer peripheral edge of the outer diaphragm 2 as a connection port of the beam 3 as shown in FIG. 4A, it is generally performed as processing after completion. However, it is also convenient to form the steel plate 21 at the stage of preparing it. A gusset plate 4 for joining the beam steel web is also attached.

[0015] Since the steel pipe column 1 with the outer diaphragm completed in this way has an excessively large plastic shape as a whole, it cannot be expected to elongate at the time of yielding. Therefore, heat treatment is performed for the purpose of improving the stress-strain relationship and removing the residual stress. In addition, distortion correction for ensuring predetermined accuracy such as inner diameter, thickness, and bending is performed, and if necessary, machining is performed to further improve accuracy.

[0016]

According to the method of 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 the bending process can be performed. By the precision control described above, a steel pipe column 1 with an outer diaphragm of high precision and high quality can be manufactured. In addition, the number of man-hours for factory production can be reduced, and the production management can be rationalized. The dimensional accuracy can be improved by performing heat treatment, machining, or the like.

[Brief description of the 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 showing a state where a steel plate for an outer diaphragm is attached to a flat steel plate for a steel pipe column.

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel pipe column 11 Flat steel plate 11a, 11b Side edge 2 Outer diaphragm 21a, 21b End 21 Steel plate

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI E04C 3/34 E04C 3/34 (72) Inventor Makoto Hara 8-21-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Store ( 72) Inventor Katsuyoshi Konan 8-21-1, Ginza, Chuo-ku, Tokyo, Japan Inside the Takenaka Corporation Tokyo Main Office (72) Inventor Hisashi Teramachi 8-2-1, Ginza, Chuo-ku, Tokyo Tokyo Main Office, Takenaka Corporation Inside shop (72) Inventor Hideto Ifuku 8-21-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Store (56) References JP 5-331966 (JP, A) JP 5-A 331967 (JP, A) JP-A-5-340032 (JP, A) JP-A-8-302900 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04C 3/32 E04C 3 / 34 E04B 1/24 E04B 1/30 E04B 1/58 508 B23K 9/00 501

Claims (2)

(57) [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 circumferential length of the steel pipe column, and a steel plate for an outer diaphragm has a width required for an outer diaphragm. The steel plate for the outer diaphragm is formed to have a thickness and a length substantially equal to the width of the flat steel plate for the steel pipe column. The flat steel plate for the steel pipe column is bent in the width direction so that the inner surface is opposite to the surface on which the steel plate for the outer diaphragm is mounted. Processing and butt-joining both side edges to form a tube body, and at the same time, the steel plate for the outer diaphragm is united and curved in a plane substantially parallel to the plate surface, and both ends are butt-joined Into a ring-shaped outer diaphragm Respectively, characterized in that forming method of the outer diaphragm with steel column. 2. A steel pipe having an outer diaphragm is completed by bending and welding, and then heat treatment is performed for the purpose of improving the stress-strain relationship and removing residual stress. The method for producing a steel pipe column with an outer diaphragm according to the above.