JP2002180540A - Manufacturing method for structural body for square steel pipe column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for a structural body for a steel pipe column capable of easily attaching or removing auxiliary members for welding and of easily and efficiently carrying out welding work. SOLUTION: A bevel portion 16 is formed at the end of a beam flange 15 for making welding coupling 26 to beams 14 at a plurality of places of an outer side surface 11a of a square steel tubing 10. A junction member 20 formed with a bevel portion 21 continuing to the beam flange bevel portion 16 is attached to the outer side surface 12a of the square steel tube 12. Welding coupling 26 is performed continuously from one beam flange bevel portion 16 to other beam flange bevel portion 16 through the bevel portion 21 of the junction member. The junction members are required to be attached only between the beam flanges, in this way, the attaching work can be simplified and the junction members can be easily removed by disconnection. The welding work can be performed continuously, easily and efficiently for each beam flange.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to welding a beam flange to an outer surface of a square steel pipe forming a panel zone when obtaining a structure for a square steel pipe column used as a column of a steel structure, for example. The present invention relates to a method for manufacturing a rectangular steel pipe column structure employed in (1).

[0002]

2. Description of the Related Art Conventionally, as a method of attaching a diaphragm to a pillar side, for example, a through-diaphragm system and an inner diaphragm system have been provided. Of these, the through-diaphragm system has, for example, the configuration shown in FIGS.

That is, the column is cut (divided) into a lower column 31, a panel zone column 32, and an upper column 33 in the longitudinal direction. The lower diaphragm 34 is welded to the upper end of the lower column 31 via a backing metal, and the lower end of the column 32 is welded to the lower diaphragm 34 via a backing metal. Further, an upper diaphragm 35 is welded to an upper end of the column 32 via a backing metal, and a lower end of the upper column 33 is welded to the upper diaphragm 35 via a backing metal.

Here, the lower column 31, the column 32 and the upper column 3
3 is made of a rectangular steel pipe having a similar plate thickness, and the lower diaphragm 34 and the upper diaphragm 35 are
1, a rectangular plate having an outer dimension larger than the outer dimensions of the column 32, the upper column 33, and the like.

In the column 36 thus formed, the connection of the beam (mainly an H-shaped section) 40 to the column 32 forming the panel zone is performed by connecting the free ends of a pair of upper and lower beam flanges 41 in the beam 40. Both diaphragms 34, 3
5 by welding. That is, the beam flange 41 is attached to both the diaphragms 34 and 35 by the welding beads 4.
5, the end of the beam flange 41 has a groove 4
2 are formed.

A back metal plate 37 is attached to the lower surfaces of the diaphragms 34 and 35 by welding, and the back metal plate 37 faces the corner of the column 32 near the corner.
End tabs (or extended portions of the back metal plate) 38 serving as auxiliary plates are attached to both ends in the length direction by temporary welding or the like.

The beam flange 41 has two end tabs 38.
In the state of being placed on the back sheet metal 37 between the two ends, the end thereof is brought close to the outer side surfaces of the two diaphragms 34 and 35, and in this state, after passing through the groove 42 from one end tab 38, the other end tab The tack welding is performed on the surface 38. This tack welding is sequentially performed on the four beam flanges 41.

Then, the first layer welding is sequentially performed on each beam flange 41, and thereafter, the second layer welding is performed in the same manner.
The third layer welding and the welding of the predetermined layer are sequentially performed.
The connection of each beam flange 41 to the welding flange 2 by the welding bead 45 is performed. Thereafter, the end tabs 38 are removed by gas cutting or the like.

[0009]

However, in the above-mentioned conventional welding connection method, each back metal plate 37 has two
When the beam 40 is welded to all (four) outer surfaces, a total of 16 end tabs 38 must be attached, and the tack welding operation is troublesome. is there. Further, the welding work of multiple layers including tack welding is interrupted at the corners, so that welding and stopping are repeated for each beam flange 41, so that it is not easy to perform, and the efficiency is poor. Was. Moreover, in practice, welding defects are likely to occur at the end tab 38, which is the start and end of welding of the beam flange 41. Furthermore, after the welding connection 36 of the bracket 35 is performed, the end tabs 35 are removed by gas cutting, which requires a removing operation step (man-hours), and the removing operation cannot be easily performed.

Therefore, the invention according to claim 1 of the present invention provides a rectangular steel pipe which can easily attach and remove an auxiliary member for welding, and can easily and efficiently perform welding work without generating welding defects. An object of the present invention is to provide a method for manufacturing a column structure.

[0011]

In order to achieve the above-mentioned object, a method for manufacturing a structure for a square steel pipe column according to the first aspect of the present invention is characterized in that beams are welded to a plurality of locations on the outer surface of the square steel pipe. To this end, a groove portion is formed at the end of the beam flange, and a relay member having a groove portion connected to the beam flange groove portion is attached to the outer surface of the rectangular steel pipe, and the welding connection is performed. The process is performed continuously from one beam flange groove portion to the other beam flange groove portion via the relay member groove portion.

Therefore, according to the first aspect of the present invention, it is sufficient to attach the relay member only to the corner portion. That is, for example, when welding the beam flanges to the four outer surfaces, a total of eight relay members are attached. Good. Further, the welding operation can be performed continuously over the entire circumference without repeating welding and stopping, and a rib-like weld bead remains on the outer surface of the steel pipe corner between the beam flanges.

According to a second aspect of the present invention, there is provided a method of manufacturing a rectangular steel pipe column structure according to the first aspect of the present invention, wherein the rectangular steel pipe has a portion where a beam flange is welded and connected to a thickened panel portion. It is characterized by being formed.

Therefore, according to the second aspect of the present invention, the welded joint portion of the beam flange can be reinforced by the thickened panel portion. According to a third aspect of the present invention, there is provided a method for manufacturing a structure for a square steel pipe column according to the first or second aspect, wherein the outer surface is located on both sides of a quadrangular corner portion of the square steel pipe. After the beam flanges are temporarily welded, a relay member is attached between the two beam flanges, and after the continuous welding connection is performed, the relay members are removed.

Therefore, according to the third aspect of the present invention, attachment and removal of the relay member can be easily performed by utilizing elasticity, and the relay member after removal can be reused. Further, a method for manufacturing a structure for a square steel tubular column according to claim 4 of the present invention is characterized in that, in the configuration according to any one of claims 1 to 3, the relay member is made of ceramics. is there.

Therefore, according to the invention of claim 4, the relay member made of ceramics can be removed by removal or the like.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
A description will be given based on FIG.

As shown in FIG. 1 to FIG.
Reference numeral 0 denotes a group of side plate portions (flat plate portions) 11 forming four surfaces and four quadrant-shaped corner portions 12. And the corner portion 12 is continuous with the outer surface 11a.
Is located. Here, the outer surface 11a of the side plate portion 11 located between the outer surfaces 12a of the corner portion 12
This forms a panel zone, and this outer surface 11a becomes a surface to which a beam flange (described later) is joined.

The rectangular steel pipe 10 has a thin-walled portion 10A having a thickness t determined by the design of the column.
The remaining intermediate portion is formed in a thickened panel portion 10B having a plate thickness T greater than the plate thickness t of the thin portion 10A and a length (height) L forming a panel zone. Here, the thick plate thickness T is determined from the viewpoint of preventing local deformation of the surface and the shear deformation of the panel. For example, when the outer dimension W is 450 mm, the plate thickness t of the thin portion 10A is about 17 mm, and the thickness is increased. The plate thickness T of the panel portion 10B is about 40 mm.

The beam flanges 15 of the beams 14 can be welded to both outer side surfaces 11a of the side plate portions 11 located on both sides of the corner portion 12 by welding. That is, the beam 14 is an H-shaped cross-section material, and one end side of the beam flange 15 positioned above and below (the side connected to the square steel pipe 10).
Are formed in the outwardly widened portion 15A.

The widened portion 15A is for equalizing the beam width a when the beam width a is smaller than the steel tube flat plate portion width A. , Or by welding a right triangular plate.

The beam flange 15 including the widened portion 15A is provided.
A groove 16 is formed at the end of the groove.
A back metal plate 17 that is joined to the side plate portion 11 by welding is located on the back surface side of.

On the outer surface 12a of the corner portion 12,
A relay member 20 made of ceramics can be attached freely. Here, the relay member 20 is formed in an arc shape along the radius of curvature of the corner portion 12, and a groove portion 21 connected to the flange groove portion 16 is formed on the inner side of the arc, and The arc-shaped end face 20 a is
Is configured to be able to abut on the outer side surface 12a.

In order to weld the beam flange 15 of the beam 14 to the square steel pipe 10, first, the end face of the beam flange 15 is
The beam flange 15 is temporarily welded to the side plate portion 11 by using the back sheet metal 17 in a state where the beam flange 15 is set to the back sheet metal 17 abutted and welded to the outer side surface 11a. Next, in a state where the beam flanges 15 are tack-welded to the four side plate portions 11 respectively, each corner portion 12 is formed.
Is attached to the relay member 20.

The connection of the group of relay members 20 is performed by enlarging the widened portions 1 of the pair of beam flanges 15 which are adjacent to each other at right angles.
This is performed by fitting the relay member 20 between the outer surfaces of 5A. At that time, the fitting is performed in a state against the elasticity of the back metal plate 17 and the like, so that the mounting is performed without falling off by the elastic force. The end surface 20 a of the relay member 20 is in contact with the outer surface 12 a of the corner portion 12.

As described above, each side plate portion 11 of the square steel pipe 10
And the connecting member 20 is fitted between adjacent beam flanges 15 so that the groove is formed on the outside of the rectangular annular outer surfaces 11a and 12a of the rectangular steel pipe 10. The groups 16, 21 are continuously arranged in a rectangular shape.

In such a state, the welding torch 25
The welding connection 26 is applied via such as. That is, the welding connection 26 is started from, for example, the flange groove portion 16 of one (a certain) beam flange 15, and is continuously performed in the width direction of the side plate portion 11. By entering the member groove 21, it is performed continuously along the radius of curvature of the corner portion 12, and the flange groove 16 on the other (adjacent another) beam flange 15, the next relay member groove The operation is continuously performed from the portion 21 to the next flange groove portion 16.

Thus, the welding of the first layer can be performed continuously over the entire circumference of the rectangular steel pipe 10 without stopping on the way. Then, in the same manner, the welding of the second layer and the welding of the third layer are performed in this order. May be welded together to form a weld bead.

The beam flange 15 with respect to the side plate 11
Is performed at the upper and lower beam flanges 15, for example, simultaneously. Then, after the welding connection 26, the relay member 20 is removed. At this time, the relay member 20 fitted in against the elasticity can be easily removed against the elasticity of the back plate 17 or the like. It can be reused and becomes economical. By removing the relay member 20,
As shown in FIG. 1 and FIG.
In 2a, a weld bead remains in a rib shape.

As described above, according to the manufacturing method of the present invention, the relay member 20 only needs to be attached to the corner portion 12, that is, for example, all (four) outer surfaces 1
When welding the beam flanges 15 to 1a, a total of eight relay members 20 need only be mounted, so that the mounting operation is facilitated, and the ceramic relay members 20 can be easily removed by removal. As described above, attachment and removal of the relay member 20 (auxiliary member) for the welding connection 26 can be easily performed.

Further, since the welding operation can be continuously performed on each beam flange 15 without repeating welding and stopping, the welding operation can be easily and efficiently performed. Moreover, the corner portion 12 can be reinforced by the rib-shaped weld bead remaining on the outer side surface 12a of the corner portion 12.

The rectangular steel pipe 10 with the beam 14 thus obtained, that is, the rectangular steel pipe column structure 8 is welded to the elongated rectangular steel pipe 2 in the longitudinal direction as shown in FIGS. By joining 3, the square steel pipe column 1 can be configured. Here, the plate thickness of the long rectangular steel pipe 2 is assumed to be equal to the plate thickness t of the thin portion 10A.

When performing the above-described welding connection 3, a backing metal 4 is set in a ring shape as necessary inside the welding location. It is also possible to perform welding by fitting the ends of the rectangular steel pipe 10 and the long rectangular steel pipe 2 to each other. Then, as shown by the phantom line in FIG. 4, the rectangular steel pipe columns 1 are arranged in a stacked manner, and are welded 3 between the upper and lower portions to be formed to a predetermined length (height).

In the first embodiment, the beam flanges 15 of the beams 14 are welded to all (four) outer surfaces 11a. Is used, a stiffening plate is provided on some surfaces.

FIG. 6 shows a second embodiment in which the square steel tubular column 1 is used at a corner. At this time, a stiffening plate 23 is provided instead of the beam flange 15 on the two side plate portions 11 where the beam 14 is not connected by turning outward at the corner. This stiffening plate 23 also has a groove portion 24, and is tack-welded with the end surface 23a in contact with the outer surface 11a. Subsequent welding of the predetermined layer is performed at the stiffening plate groove 2
4, the steel pipe outer surfaces 11a, 12a can be continuously formed over the entire circumference in the same manner as in the first embodiment described above.
The structure 8 for the square steel tubular column is constituted by the welded joints 26 constructed over the entire circumference of the section a.

FIG. 7 shows a third embodiment in which the rectangular steel tubular column 1 is used in the middle of the side. At this time,
A stiffening plate 23 is provided in place of the beam flange 15 on one side plate portion 11 where the beam 14 is not directed outward at the side portion.

As in the above-described second and third embodiments, the side plate portion 1 on the surface where the connection of the beam 14 is not performed is performed.
By arranging the stiffening plate 23 at 1, the welding operation of the beam flange 15 on two or three surfaces can be easily and efficiently performed continuously over the entire circumference without repeating welding and stopping. become. Moreover, the stiffening plate 23 plays a role of restraining out-of-plane deformation of the side plate portion 11 to which the beam flange 15 is not connected (securing out-of-plane rigidity of the column section).

Next, a fourth embodiment of the present invention will be described with reference to FIG.
It will be described based on. In the first to third embodiments described above, the short beam 1 is attached to the outer side surface 11a of the square steel pipe 10.
4 is welded 26 and the long beam 5 is connected to the free end of the beam 14, which may be directly welded to the long beam 5. That is, as shown in FIG. 8, the beam flange 6 of the beam 5 is directly welded to the outer surface 11a of the rectangular steel pipe 10. In this case, a groove portion is formed in the upper and lower beam flanges 6, and the tacking welding, the attachment of the relay member 20, the welding connection 26, the removal of the relay member 20, and the like are performed in the first to third steps described above. This can be performed in the same manner as in the embodiment.

Next, a fifth embodiment of the present invention will be described with reference to FIG.
It will be described based on. In the above-described first to fourth embodiments, the rectangular steel pipe column 1 is configured by welding and joining the rectangular steel pipe column structure 8 to the long rectangular steel pipe 2 in the length direction. This may be a rectangular steel pipe column structure 8 integrally having the long rectangular steel pipe 2. That is, as shown in FIG. 9, the panel zone for connecting the beam 14 to the lower part of the long rectangular steel pipe 10 is the outer surface 1 of the thickened panel portion 10B.
After the long rectangular steel pipes 10 formed of 1a are arranged in a stacked manner, the upper and lower portions thereof are welded together 3 to form a rectangular steel pipe column 1 having a predetermined length (height).

In each of the above-described embodiments, the square steel pipe 10 and the long rectangular steel pipe 2 are, for example, a one-seam square steel pipe formed by roll forming, and a two-seam square steel pipe formed by butt-welding a pair of grooves formed by press forming. An off-the-shelf square steel pipe is used, such as a two-seam square steel pipe formed by welding a pair of rolled groove members, and a two-seam square steel pipe formed by welding a pair of rolled angle members facing each other.

In each of the above embodiments, the square steel pipe 10
Although square steel tube columns having a square shape in cross section are employed, rectangular steel tube columns having a rectangular cross section can be similarly employed. Further, the present invention can be similarly applied to various polygonal rectangular steel pipe columns such as a regular pentagon and a regular hexagon.

In each of the above embodiments, the rectangular steel pipe 10 and the long rectangular steel pipe 2 may be cold-formed or hot-formed. In each of the above-described embodiments, the ceramic relay member 20 is employed and removed after the welded joint 26. However, the relay member may be made of a metal such as iron or copper, or a non-metal. It may be.

In each of the above embodiments, the square steel pipe 1
In the case of No. 0, a portion of the panel zone where the beam flange 15 is joined is formed in the thickened panel portion 10B and reinforced, so that a diaphragm is not required, and the number of parts and welding points can be omitted correspondingly. However, depending on the outer dimensions of the steel pipe column adopted according to the scale of the steel structure, the square steel pipe 1
As 0, the entire length may be formed in the thin portion 10A and the thickened panel portion 10B may not be formed.

In each of the above-described embodiments, an outwardly widened portion 15A is formed at one end of the beam flange 15, whereby the out-of-plane rigidity of the column surface can be suitably secured. Also, by widening the flange width at the beam end, it is possible to prevent early joint rupture at the time of a large earthquake. However, when the beam width a is equal to the side plate portion width A, a beam flange 15 having no widened portion 15A may be used.

In each of the embodiments described above, welding is performed by a semi-automatic arc welding machine or a robot welding machine. According to this, high-quality welding can be performed in a short time. In addition,
Other welding methods such as laser may be used.

[0046]

According to the first aspect of the present invention, in order to manufacture a structure for a square steel tubular column, a relay member may be attached only to a corner portion, that is, for example, beam flanges are provided at four outer surfaces. When welding is performed, a total of eight relay members need only be mounted, and mounting of the relay members for welding can be easily and quickly performed.

Further, the welding operation can be easily and efficiently performed because the entire circumference can be continuously performed without repeating welding and stopping, and high-quality welding which does not cause welding defects by omitting the tabs. Welding can be secured. In addition, the continuous welding work of the entire circumference can be completely automated by, for example, robot welding, so that it is possible to greatly reduce costs, shorten delivery times, and improve the working environment by saving labor.
And, between the members to be joined can be reinforced by the rib-shaped weld beads remaining on the outer side surfaces between the beam flanges.

Further, according to the second aspect of the present invention, the welded joint portion of the beam flange can be reinforced by the thickened panel portion, and the diaphragm can be made unnecessary.

According to the third aspect of the present invention, the attachment and removal of the relay member can be easily performed by utilizing elasticity, and the ceramic relay member after the removal is reused ( Recycling) can be done and it becomes economical.

Further, according to the fourth aspect of the present invention, the relay member made of ceramics can be easily and quickly removed by removal or the like.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, and is a perspective view of a square steel pipe portion when a member to be joined is attached in a method for manufacturing a structure for a square steel pipe column.

FIG. 2 is a plan view of a rectangular steel pipe portion in a method for manufacturing the same rectangular steel pipe column structure.

FIGS. 3A and 3B are longitudinal sectional views of a main part of a rectangular steel pipe portion in a method for manufacturing the same rectangular steel pipe column structure, wherein FIG.
Is a corner part.

FIG. 4 is a vertical sectional front view of the square steel tubular column.

FIG. 5 is a partially cutaway perspective view of the square steel tubular column.

FIG. 6 shows a second embodiment of the present invention and is a plan view of a square steel pipe portion in a method for manufacturing a square steel pipe column structure.

FIG. 7 shows a third embodiment of the present invention and is a plan view of a rectangular steel pipe portion in a method for manufacturing a rectangular steel pipe column structure.

FIG. 8 shows a fourth embodiment of the present invention, and is a longitudinal sectional front view of a square steel tubular column.

FIG. 9 shows the fifth embodiment of the present invention, and is a longitudinal sectional front view of a square steel tubular column.

FIG. 10 shows a conventional example and is a cross-sectional plan view of a structure for a square steel tubular column.

FIG. 11 is a side view of a main part of the rectangular steel pipe column structure.

FIG. 12 is a perspective view of a main part of the same-shaped steel pipe column structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rectangular steel pipe column 2 Long rectangular steel pipe 5 Beam 8 Structure for rectangular steel pipe column 10 Rectangular steel pipe 10A Thin part 10B Thickened panel part 11 Side plate part 11a Outside surface 12 Corner part 12a Outside surface 14 Beam 15 Beam flange 15A Widening part 16 Flange groove 17 Back sheet metal 20 Ceramic relay member 20a End surface 21 Relay member groove 23 Stiffening plate 23a End surface 24 Stiffening plate groove 26 Welded joint A Steel pipe closed plate width a Beam width t Column plate Thickness T Panel thickness

Claims (4)

[Claims] A beam is welded to a plurality of locations on the outer surface of a rectangular steel pipe. A groove is formed at an end of a beam flange, and a beam flange is formed on an outer surface of the rectangular steel pipe. A relay member having a continuous groove portion is attached, and welding connection is performed continuously from one beam flange groove portion to the other beam flange groove portion via the relay member groove portion. A method for manufacturing a structure for a square steel tubular column. 2. The method for manufacturing a rectangular steel pipe column structure according to claim 1, wherein the rectangular steel pipe has a portion where the beam flange is welded and connected to the thickened panel portion. 3. A beam flange is tack-welded to an outer surface located on both sides of a quadrangular corner portion of a rectangular steel pipe, and then a relay member is attached between the two beam flanges to perform continuous welding connection. The method according to claim 1, wherein the relay member is removed after the breaking. 4. The method according to claim 1, wherein the relay member is made of ceramics.