JPH0886018A - Joint reinforcing metal fitting of steel pipe column and steel pipe column reinforced at the joint - Google Patents

Abstract

PURPOSE: To provide a precise and inexpensive metal block reinforcing the joint of a column and a beam and a steel pipe column reinforced, without decrease in the productivity of the joint between the steel pipe column and the beam and the connection workability of the beam at the civil and building construction site. CONSTITUTION: A hollow metal block is provided with the body 1 having the inner wall shape corresponding to the outer wall of a steel pipe column 5 to be reinforced, a pair of collars 2 provided at the upper and lower ends of the outer edge, and a pair of grooves 3 for fillet weld, made at the upper and lower ends of the inner edge. A steel pipe column 5 is arranged in the inner wall and fixed to the specified fillet welding grooves 3 of the metal block to constitute the joint of the column and the beam. Accordingly, the weld length is shortest and the welding heat is least and hence, the reinforcing metal fitting having a high productivity and a high dimensional precision and the reinforced steel pipe column 5 can be obtained. And further, since the steel pipe column 5 is covered with a metal block when a mutually connecting type metal block is used and joined together as a unit, the insertion work thereof into the steel pipe column 5 becomes unnecessary and hence, the workability is increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column-beam joint portion of a steel pipe column used in, for example, the field of civil engineering and construction, and more particularly to a metal product for reinforcing the joint portion and a steel pipe column having the joint portion reinforced. is there.

[0002]

2. Description of the Related Art Conventionally, in a circular or prismatic steel pipe column used in the field of civil engineering and construction, when a beam is joined to the steel pipe column, a plate-like brim protruding from the steel pipe column is welded in advance. It was common to weld or bolt the flange of the beam to this collar. The steel pipe column portion sandwiched by the pair of upper and lower flanges, that is, the range sandwiched by the upper and lower flanges of the beam is called a joint portion. Since a large shearing force and a tensile force are applied to the joint portion, it is necessary to make the wall thickness of this portion thicker than other portions and increase the cross-sectional area thereof.

FIG. 5 is a vertical cross-sectional view showing the structure of a conventional steel pipe column in which a joint portion is reinforced. In the figure, 31a is an upper steel pipe column, and 32a is an upper partition plate (referred to as a through diaphragm) whose upper surface is welded to the steel pipe column 31a, and serves as the above-mentioned collar. Reference numeral 31b is a lower steel pipe column, and 32b is a lower partition plate (referred to as a through diaphragm) whose lower surface is welded to the steel pipe column 31b, and serves as the above-mentioned collar. And 33
Is a thick-walled steel pipe whose upper end surface is welded to the lower surface of the upper partition plate 32a and whose lower end surface is welded to the upper surface of the lower partition plate 32b. Furthermore, a partition plate (through diaphragm)
An H-section steel flange is joined to the outer ends of 32a and 32b, and an H-section steel web is joined to the outer wall of the thick-walled steel pipe 33.

FIG. 6 and FIG. 7 are a cross-sectional view and a side view, respectively, showing the structure of a conventional rectangular steel pipe column in which a joint portion is reinforced. In the figure, 41 is a rectangular steel tube column, and 42 is a pair of projecting plates (referred to as outer diaphragms) penetrating the rectangular steel tube column 41, which serve as the above-mentioned collar. Further 43
Is a plurality of reinforcing steel plates adhered to the outer surface of the joint portion of the rectangular steel pipe column 41, and the periphery thereof is fillet welded. Further, an H-shaped steel flange is joined to the outer end of the projecting plate (outer diaphragm) 42, and an H-shaped steel web is joined to the bonded reinforcing steel plate 43.

FIG. 8 and FIG. 9 are a cross-sectional view and a side view, respectively, showing the structure of a conventional circular steel pipe column in which a joint portion is reinforced. In the figure, 51 is a circular steel pipe column, and 52 is a pair of annular projecting plates (referred to as outer diaphragms) penetrating the circular steel pipe column 51, which serve as the above-mentioned collar.
Further, 53 is a plurality of bent reinforcing steel plates or a plurality of divided reinforcing steel pipe pieces adhered to the outer surface of the joint portion of the circular steel pipe column 51, and the periphery thereof is fillet welded. further,
An H-shaped steel flange is joined to the outer end of the overhang plate (outer diaphragm) 52, and the H-shaped steel flange is directly bonded to the circular steel pipe column 51 in the gap between the bonded reinforcing steel plates or reinforcing steel pipe pieces 53.
Sectional webs are joined.

[0006] Such a conventional steel pipe column that reinforces the beam-column joint is constructed as described above. For example, a thick steel pipe is attached to the joint or the joint is connected to the joint. By welding thick steel plates, the cross-sectional area of the steel pipe column joint is made larger than other parts, and the shearing force and tensile force applied to the column-beam joint are alleviated, thereby reinforcing the joint. It is supposed to do.

[0007]

In a conventional steel pipe column having a beam-column joint portion reinforced as shown in FIG. 5, an upper partition plate (through diaphragm), a thick steel pipe, and Since the lower partition plate (through diaphragm) is set in order, when welding to each other, preparation of thicker steel pipes, cutting of steel pipe columns, machining of groove, mutual centering, mutual mutual Since a lot of man-hours are required due to the extension of the welding length due to welding, there is a problem that the productivity of the column-beam joint is poor and the price of the steel pipe column rises. Further, since a bending moment is applied to the steel pipe column, it is necessary to perform welding and reliable inspection with particularly high reliability, so that there are problems that the work process increases, the manufacturing period of the steel pipe column increases, and the price increases. Also, due to the welding heat generated during welding, the steel pipe columns and partition plates (through diaphragms) are distorted, and the distance between the outer edges of the pair of partition plates (through diaphragms) can be misaligned. However, there was a problem in that the joining of the two would interfere. In addition, concrete cannot be filled inside the steel pipe columns partitioned by a pair of partition plates (through diaphragms),
There was a problem that it did not have a so-called concrete structure.

In a conventional rectangular steel tube column that reinforces the column-beam joints as shown in FIGS. 6 and 7, a plurality of substantially rectangular steel plates are attached to the outer surface of the steel tube column. When welding, the steel plates need to be cut, the groove processed, the mutual alignment, and the fillet welds on the four sides of each steel plate are required. There was a problem that the price of steel pipe columns increased due to poor performance. Also, due to the increase in welding heat due to the extension of the welding length, the steel pipe column and the overhanging plate (outer diaphragm) are distorted, and the distance between the outer edges of the pair of overhanging plates (outer diaphragm) can be misaligned. There was a problem that it hindered the joining of the beam flanges on site.

In a conventional circular steel pipe column having reinforced column and beam joints as shown in FIGS. 8 and 9, a plurality of bent substantially rectangular steel plates or divided steel pipes are provided on the outer surface of the steel pipe column. Since the pieces are attached to each other, when they are welded to each other, cutting and bending of steel plates or cutting of steel pipes, groove processing, mutual alignment, and the four side corners of each steel plate or split steel pipe piece Since meat welding or the like is required and the number of steps is increased, there is a problem that the productivity of the column / beam joint is poor and the price of the steel pipe column is increased. Also, due to the increase in welding heat due to the extension of the welding length, the steel pipe column and the overhanging plate (outer diaphragm) are distorted, and the distance between the outer edges of the pair of overhanging plates (outer diaphragm) can be misaligned. There is a problem that the welding of the beam flanges is hindered in joining the beam flanges on site.

The present invention has been made in order to solve such a problem. Even if the cross-sectional area of the steel pipe column of the joint portion is made larger than that of the other portion, the productivity of the column-beam joint portion is improved. Steel pipe column joints and fittings that do not deteriorate, can suppress the price increase of steel pipe columns, do not reduce the dimensional accuracy, and facilitate the joint work of beam flanges at construction sites of civil engineering and construction. The purpose is to obtain a steel tube column with reinforced parts.

[0011]

According to a first aspect of the present invention, there is provided a steel pipe column joint reinforcing metal member having a shape corresponding to the outer shape of a circular or rectangular steel pipe column whose inner wall portion is to be reinforced. It consists of a hollow metal object having a body portion in which the steel column is arranged, a pair of fillet welding grooves is provided on the inner edge portion of the body portion, and a pair of overhangs is formed on the outer edge portion of the body portion. A tsuba is provided. Therefore, in the present invention, the steel pipe pillar is arranged in the inner wall portion and is joined to the steel pipe pillar at the fillet welding groove. Further, it is joined to the beam flange at the outer end of the collar and to the beam web at the outer end of the cylindrical portion.

According to a second aspect of the present invention, there is provided a steel pipe column joint-reinforcing metal fitting as claimed in claim 1, wherein the plurality of metal-clad joint-reinforcing metal fittings have an arc-shaped cross section. It is made up of cylindrical metal parts that are welded together, and its inner diameter is slightly larger than the outer diameter of the circular steel pipe column to be reinforced. The tip is provided, and further, a pair of protruding flanges is provided on the upper and lower ends of the outer periphery of the cylindrical portion. Accordingly, the present joint reinforcing metal fitting is abutted and welded to each other at the outer peripheral portion of the steel pipe column to have a cylindrical shape, and is joined to the steel pipe column at the fillet welding groove. Further, it is joined to the beam flange at the outer peripheral portion of the flange and to the beam web at the outer peripheral portion of the cylindrical portion (hereinafter, referred to as an inter-joint type cylindrical joint reinforcing metal article).

According to a third aspect of the present invention, there is provided a steel-column joint reinforcing metal article according to the first aspect, which is the integral type rectangular-section joint reinforcing metal article. It is composed of a metal body having a hollow body having a rectangular cross section formed by welding metal products to each other. Then, the inner wall portion of the body is a rectangle that is slightly larger than the outer shape of the rectangular steel pipe column to be reinforced, and a pair of fillet welding grooves is provided on the upper and lower ends of the rectangular inner edge of the body, respectively, and A pair of protruding flanges is provided on the upper and lower ends of the rectangular outer edge of the body. Therefore, the present joint reinforcing metal fitting is abutted and welded to each other at the outer wall portion of the rectangular steel pipe column to have a rectangular sectional shape, and is joined to the rectangular steel pipe column at the fillet welding groove. Further, it is joined to the beam flange at the outer end portion of the collar and to the beam web at the outer wall portion of the rectangular body (hereinafter referred to as inter-joint type rectangular cross-section joint reinforcing hardware).

According to a fourth aspect of the present invention, a steel pipe column reinforced with a joint portion is a steel pipe column to which the joint reinforcing metal fitting according to any one of the first, second or third aspects is attached.

[0015]

In the present invention, a pair of fillet welding grooves are provided at the inner edge portion and a pair of projecting flanges are provided at the outer edge portion, and the shape of the inner wall portion corresponds to the outer shape of the steel pipe column to be reinforced. It is a connector reinforcing metal object having a body,
Since the steel pipe pillar is arranged in the inner wall portion and is fixed to the steel pipe pillar by welding at the fillet welding groove portion, the cross-sectional area of the joint portion of the steel column is equivalent to the cross-sectional area of the body portion. Since it increases, the shearing force, the tensile force, and the like that act on the column-beam joint are alleviated.

Further, since the joint reinforcing metal article of the present invention is fixed by welding to the steel pipe column at the pair of fillet welding grooves provided at the inner edge portion, the welding length is the outer wall length of the steel pipe column. It is almost twice as much.

Further, according to the above-mentioned mutual joining type cylindrical joint reinforcing metal piece and rectangular cross-sectional shape reinforcing metal fitting, they are abutted and welded to each other on the outer wall portions of the circular and rectangular steel pipe columns, respectively. Since it has a rectangular cross-sectional shape and is joined to circular and square steel pipe columns at the fillet welding groove, these joint reinforcement hardware need to be inserted from one end of the circular and square steel pipe columns and moved to a predetermined position. Absent. Furthermore, the gap between the inner wall of these connection reinforcing metal articles and the outer wall of the circular and rectangular steel pipe columns becomes sufficiently small.

[0018]

【Example】

Example 1 FIG. 1 is a vertical cross-sectional view showing the structure of a steel pipe column with a reinforced connection according to an example of the present invention. In the figure, 1 is a body of an integrated cylindrical joint reinforcing metal piece, 2 is a flange of an integrated cylindrical joint reinforcing metal fitting, 3 is a fillet welding groove, 4 is an H-shaped steel beam,
Reference numeral 4a is an H-shaped steel beam web, 4b is an H-shaped steel beam flange, and 5 is a circular steel pipe column. Since the gap between the inner diameter of the body portion 1 and the outer diameter of the circular steel pipe column 5 is 2-3 mm, this integrated type reinforcing metal fitting can be inserted from one end of the circular steel pipe column 5 and moved to a predetermined position. In the fillet welding groove 3, the reinforcing metal can be immediately fixed to the circular steel pipe column by fillet welding. Further, the circular steel pipe column to which the reinforcement metal is fixed has an H-shaped steel beam web 4a on the outer periphery of the tubular portion 1 of the reinforcement metal and an H-shaped flange 2 on the outer surface of the reinforcement metal at the construction site of civil engineering and construction. The steel beam flanges 4b are easily joined together.

Embodiment 2 FIG. 2 and FIG. 3 are external views showing the construction of a steel pipe column joint reinforcing metal and a steel pipe column whose joint portion is reinforced according to another embodiment of the present invention. In the figure, 6 is a circular steel pipe column, 10 is a half-cutting part of a mutual joining type cylindrical joint reinforcing metal piece, 1
Reference numeral 1 is a cylindrical portion of the half-cutting portion of the mutual joining type cylindrical joint reinforcing metal article
2 is a flange part of the half-cutting part of the mutual joining type cylindrical joint reinforcing metal piece, 1
Reference numeral 3 is a groove for fillet welding, 14 is an abutting surface of a mutual joining type cylindrical joint reinforcing metal piece, 15 is a fillet welding bead, and 16 is a butt welding bead. In the present embodiment, the connection reinforcing hardware is
A pair of the above-mentioned metal half-cutting parts 10 having a semicircular cross section.
Are abutted against each other at positions corresponding to the joints on the outer periphery of the circular steel pipe column 6 and integrated by welding, and further fixed to the circular steel pipe column 6 at the fillet welding groove 13 by fillet welding.

Embodiment 3 FIG. 4 is an external view showing the structure of a steel pipe column connection reinforcing metal fitting according to another embodiment of the present invention. In the figure, 20 is a half-cut portion of a reinforcing metal piece having a rectangular cross-section joint, a reference numeral 21 is a channel steel having a length substantially equal to one width of a rectangular steel pipe column to be reinforced,
Reference numeral 22 is a grooved steel having a length longer than the other width of the rectangular steel tube column to be reinforced, 23 is a groove for fillet welding, and 24 is a fillet weld bead. In the mutual joining type rectangular sectional shape joint reinforcing metal fitting of this embodiment, the channel steels 21 and 22 are used.
Are cut out from grooved steel having a groove width approximately equal to the web height of the H-shaped steel beam to be joined to the rectangular steel pipe column to be reinforced, and are fillet-welded into an L-shape at the fillet-welding groove 23. Then, the half-cutting unit 20 is formed. Then, the pair of half-cut portions 20 are abutted against each other at positions corresponding to the joints of the rectangular steel pipe column and integrated by welding, and the fillet welding groove 23 is fixed to the rectangular steel pipe column by fillet welding.

[0021]

Since the present invention is constructed as described above, it has the following effects.

According to the present invention, there is provided a hollow metal object having an inner wall having a shape corresponding to the outer shape of the steel pipe column to be reinforced,
Since the steel pipe pillars are arranged on the inner wall portion and fixed to each other at positions corresponding to the joint portions by welding, the cross-sectional area of the steel pipe pillars at the joint portion increases, so that shearing force acting on the joint portion and The tensile force and the like are alleviated, and the beam-column joint is reinforced.

Further, according to the present invention, since a pair of fillet welding grooves are provided at the inner edge of the joint reinforcing metal article, the steel pipe column and the joint reinforcing metal article are welded at the welding groove. The weld length is limited to approximately twice the length of the outer wall of the steel pipe column because it is fixed by. That is, compared with the conventional case of welding a thick-walled steel pipe between two upper and lower partition plates (through diaphragms), the welding length becomes about half, and when a steel plate or a steel pipe piece is bonded to the outer surface of a conventional steel pipe column. Compared with, the welding length is extremely short, so that the productivity of the column-beam joint is improved and the price of steel pipe columns can be reduced. At the same time, since the generation of welding heat is suppressed to a minimum, the distortion of the steel pipe column due to welding heat is minimal, and the upper and lower flanges (outer diaphragm)
Since the interval of is accurately maintained, the joining work between the H-shaped steel beam and the steel pipe column at the construction site of civil engineering and construction becomes easy and quick, and the construction cost for construction can be reduced.

Further, according to the present invention, since the mutual joining type joint reinforcing metal fitting can be integrated by wrapping the steel pipe column from the outside, butting the joint surfaces together and welding them together, the joint reinforcing metal fitting is Since it is not necessary to insert the steel pipe column from one end and move it to a predetermined position, it becomes easy to position the joint reinforcing metal piece, the productivity of the column-beam joint portion is improved, and the price of the steel pipe column can be reduced. Further, the gap between the inner wall of the joint reinforcing metal object and the outer wall of the steel pipe column can be made narrower than that in the case of the integral type joint reinforcing metal object, and unnecessary welding penetration is suppressed, so that the welding work becomes quick. Further, since it becomes easy to set and adjust the gap, the material selection range of the reinforcing metal body increases, and the material procurement becomes easy and quick. Therefore,
The productivity of the column-beam joint will be improved, and the price of steel pipe columns will be reduced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a steel pipe column in which a column-beam joint portion is reinforced according to an embodiment of the present invention.

FIG. 2 is an external view of a mutual joining type joint reinforcing metal member for a circular steel pipe column according to another embodiment of the present invention.

FIG. 3 is an external view of a circular steel pipe column reinforced by the mutual joining type joint reinforcement metal of FIG.

FIG. 4 is an external view of a half cut part of an inter-joint type joint reinforcing metal piece for a rectangular steel pipe column according to another embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view of a steel pipe column showing an example of reinforcement of a beam-column joint portion by a conventional method.

FIG. 6 is a cross-sectional view of a rectangular steel pipe column showing an example of reinforcement of a beam-column joint portion by a conventional method.

FIG. 7 is a side view of the conventional rectangular steel tube column of FIG.

FIG. 8 is a cross-sectional view of a round steel pipe column showing an example of reinforcement of a column-beam joint by a conventional method.

9 is a side view of the conventional round steel pipe column of FIG. 8. FIG.

[Explanation of symbols]

 1 Cylinder of integrated joint reinforcing metal 2 Collar of integrated joint reinforcing metal 3 Groove for fillet welding 4 H-shaped steel beam 5 Steel pipe column 6 Steel pipe column 10 Mutual joint type cylindrical reinforcing metal fixture 11 Mutual Joining type cylindrical joint reinforcing metal tube 11 Mutual joining type cylindrical reinforcing metal tube 21 Groove steel 33 Thick steel pipe 42 Overhanging plate (outer diaphragm) 43 Reinforcing plate 52 for overhanging part (Outer diaphragm) 53 Reinforcing plate for joint part 32a Partition plate (through diaphragm)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuyuki Nakamura 1-2 1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Osamu Hirano 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Main Steel Pipe Co., Ltd.

Claims (4)

[Claims] 1. A body portion having an inner wall portion having a shape corresponding to an outer shape of a steel pipe column to be reinforced, and a pair of fillet welding grooves provided at upper and lower ends of an inner edge portion of the body portion, respectively. It consists of a hollow metal object having a pair of overhanging flanges provided at the upper and lower ends of the outer edge of the body, and the steel pipe pillar is arranged in the inner wall portion, and the steel pipe pillar is provided in the fillet welding groove. And a beam flange at the outer end of the flange, and a beam web at the outer wall of the body. 2. The steel pipe column according to claim 1, wherein the steel pipe column has a circular cross-sectional shape, and the steel pipe column is formed by mutually welding a plurality of metal objects having an arc-shaped cross-sectional shape. Joint reinforcement hardware. 3. The steel pipe column according to claim 4, wherein the steel pipe column has a rectangular cross-sectional shape, and the steel pipe column is formed by mutually welding a pair of metal objects having a substantially L-shaped cross-sectional shape. Connection reinforcement hardware. 4. A steel pipe column with a reinforced connection part, characterized in that the connection-reinforcing metal piece of the steel pipe column according to claim 1, 2 or 3 is fixed at a predetermined position.