JPH0754399A - Jointing method of steel pipe column and beam - Google Patents

Abstract

PURPOSE:To enable an H-shape steel beam to be inserted between adjacent steel pipe columns from the horizontal direction. CONSTITUTION:Cutout parts K formed by cutting out the half or almost half of the width of the end parts of the upper and lower flanges 2a, 2b of an H- shape steel beam 2 (or cutting out by the length part exceeding the width of a gusset plate in the case of the gusset plate height being larger than the height of the beam) are previously formed at both end parts of the upper and lower flanges 2a, 2b. After the insert-fitting work of the beam 2, a fit-in plate of the same shape as the cutout part K is fitted into the cutout part K and welded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of joining a steel pipe column and a beam, and more specifically, to a beam joining planned portion of a steel pipe column to which an H-shaped steel beam composed of both upper and lower flanges and a web is joined. The present invention relates to a method of joining a steel pipe column and a beam, in which a gusset plate is attached and the beam is joined to the beam joining planned portion via the gusset plate.

[0002]

2. Description of the Related Art When carrying out such a joining method, an H-shaped steel beam 2 consisting of both upper and lower flanges 2a and 2b and a web 2d is usually used, as shown in FIG. A concave surface 2e having a circular arc shape in plan view is used so as to extend along the outer peripheral surface of the concave surface.
The beam 2 having both end surfaces designated as e is brought into contact with the steel pipe column 1 along the outer peripheral surface thereof to join them. As the gusset plate 3, as shown in FIG. 11, the vertical length is shorter than the vertical length of the beam 2,
As shown in FIG. 12, one having a vertical length longer than the vertical length of the beam 2 is properly used according to various conditions and situations.

[0003]

By the way, when the beam 2 whose both end surfaces are concave surfaces 2e along the outer peripheral surface of the steel pipe column 1 as described above is used, the gusset plate 3 has a vertical length. Shorter than the vertical length of the beam 2 (Fig. 11
(See also), when the beam 2 is inserted horizontally into the beam joining planned portion between the adjacent steel pipe columns 1, the end portions of the upper and lower flanges 2a and 2b of the beam 2 interfere with the steel pipe column 1. Therefore, the beam 2 cannot be inserted from the horizontal direction. Therefore, despite the poor workability, the beam 2 suspended while being maintained in a predetermined posture is lowered from above the planned beam-joining place and inserted into the planned beam-joining place between the adjacent steel pipe columns 1. I was doing. Further, the gusset plate 3 whose vertical length is longer than the vertical length of the beam 2 (see FIG.
When the beam 2 is to be inserted horizontally into the beam-joining planned location between the adjacent steel pipe columns 1, the upper and lower end portions of the upper and lower flanges 2a and 2b of the beam 2 and the upper and lower end portions of the gusset plate 3 are to be inserted. Because of the interference, the beam 2 cannot be inserted from the horizontal direction. Therefore, even in this case, the beam 2 suspended while being maintained in a predetermined posture is lowered from above the beam-joining planned location, despite the poor workability, and the beam-joining between the adjacent steel pipe columns 1 is planned. I was trying to insert it in the place. The present invention has been made by paying attention to such an actual situation, and does not have to adopt the troublesome work of lowering a beam suspended while maintaining a predetermined posture from above a beam-joining planned location. By providing a work that has good workability, such as simply moving the beam in the horizontal direction, we provide a method that allows the beam to be easily inserted into a beam joining planned location between adjacent steel pipe columns, The purpose is to improve the workability when joining and to reduce the work cost.

[0004]

A method for joining a steel pipe column and a beam according to the present invention (hereinafter referred to as the present invention method) is a steel pipe column to which an H-shaped steel beam consisting of both upper and lower flanges and a web is joined. A gusset plate whose vertical length is shorter than the vertical length of the beam is attached to the beam-joining planned location of the beam, and through the gusset plate, both end surfaces are concave in a plan view arc shape along the outer peripheral surface of the steel pipe column. In the method of joining a steel pipe column and a beam for joining the beam to the beam joining planned location, a notch formed by notching a half width or a substantially half width of an end portion of the upper and lower flanges, Preformed on both ends of the flange, the beam having the cutout portion is horizontally inserted into a beam joining planned portion between adjacent steel pipe columns and attached to the gusset plate, and then the upper and lower flanges are Weld to steel pipe columns At this time, a fitting plate having the same shape as the cutout portion is fitted into the cutout portion, and then the fitting portions of the upper and lower flanges and the fitting plate are welded to each other, so that the beam and the fitting plate are formed. The first feature is to integrate and.

Further, a gusset plate whose vertical length is longer than the vertical length of the beam is attached to the beam-joining planned portion of the steel pipe column to which the H-shaped steel beam consisting of both the upper and lower flanges and the web is joined, and the gusset is set. A method of joining a steel pipe column and a beam for joining the beam to the planned beam joining location through a plate, wherein the width of the end of the upper and lower flanges is about half or about half the width of the gusset plate. A notch formed by notching the length is formed in advance on both ends of the upper and lower flanges, and the beam having the notch is formed.
Horizontally inserted into the beam joint planned location between adjacent steel pipe columns, after attaching to the gusset plate, when welding the upper and lower flanges to the steel pipe column, a fitting plate having the same shape as the notch, A second feature is that the beam and the fitting plate are integrated by welding the fitting portions of the upper and lower flanges and the fitting plate after fitting them into the notches. .

[0006]

In the method of the present invention having the first feature, when the beam is to be inserted horizontally from the horizontal direction into the beam joining planned portion between the adjacent steel pipe columns, both end faces are flat so as to be along the outer peripheral face of the steel pipe column. Conventionally, a portion of the beam having an arcuate concave surface that interferes with the steel tube column, that is, both ends of the upper and lower flanges of the beam is not present on only one side due to the formation of the notch. Therefore, by inserting the beam with the notch forming side forward in the insertion direction from the horizontal direction, it is possible to avoid interference between the upper and lower flanges and the steel pipe column. Moreover, the fitting plate is fitted into the gap formed in the beam due to the formation of the notch, and the fitting plate is integrated with the beam by welding the fitting portion.

In the method of the present invention having the second feature, when the beam is to be inserted horizontally from the horizontal direction to the beam-joining planned portion between the adjacent steel pipe columns, the beam is attached to the beam-joining planned region of the steel pipe column. The gusset plate (more specifically, a gusset plate longer than the vertical length of the beam), that is, the width of the both ends of the upper and lower flanges of the beam is about half or about half the width of the gusset plate. Due to the formation of the notch, a portion extending by a length exceeding the width is not present. Therefore, by inserting the beam with the notch forming side forward in the insertion direction from the horizontal direction, it is possible to avoid interference between the upper and lower flanges and the gusset plate.
Moreover, the fitting plate is fitted into the gap formed in the beam due to the formation of the notch, and the fitting plate is integrated with the beam by welding the fitting portion.

[0008]

Therefore, in both cases, the method of the present invention having the first characteristic and the method of the present invention having the second characteristic, the beam being suspended while being maintained in a predetermined posture. The beam between adjacent steel pipe columns by adopting the workability work of simply moving the beam in the horizontal direction without adopting the troublesome work of lowering it from above the beam joint planned location. It becomes possible to easily insert the steel pipe into a planned joining position, and thus workability at the time of joining the steel pipe column and the beam is improved, and the work cost can be reduced. Note that the concern that the strength of the beam will be reduced by forming the notches in the upper and lower flanges of the beam is also eliminated by the fitting and welding integration of the fitting plate performed after the beam inserting / attaching work. Like

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIGS. 1 to 6 show an embodiment (first embodiment) of the method of the present invention having the first feature. In the drawings, the portions denoted by the same reference numerals as the conventional example indicate the same or corresponding portions. 1 to 3
In the figure, reference numeral 1 denotes a cylindrical steel pipe column, and the vertical joint length of the steel pipe column 1 at the beam-joining planned location (that is, the location where the beam 2 is planned to be joined to the steel pipe column 1) is the beam 2 A gusset plate 3 shorter than the vertical length is attached by a welding method in a vertical direction, and the beam 2 is joined via the gusset plate 3. The beam 2 is
Specifically, the upper and lower flanges 2a and 2b and the web 2d in the middle between them are integrally formed of H-shaped steel. Further, both end surfaces of the beam 2 are concave surfaces 2e which are arcuate in plan view so as to be along the outer peripheral surface of the steel pipe column 1.

At both ends of the upper and lower flanges 2a, 2b, half or approximately half the width of each end (in this embodiment, the width is slightly narrower than half the width, but the width of the gusset plate 3 is smaller than that of the gusset plate 3). Depending on the mounting position, it may have a width of just half). In the present embodiment, the cutout K is cut out in a substantially rectangular shape over an appropriate length that does not exceed the width of the gusset plate 3.
As long as it is possible to avoid the interference between 2b and the steel pipe column 1, it is possible to use a notched portion in which only each end is notched in a substantially fan shape.

The beam 2 having the notch K is horizontally inserted into a beam joining planned portion between adjacent steel pipe columns 1 as shown by an arrow in FIG. 4, and a high strength bolt 6 is used. It is attached to the gusset plate 3. Then, when the upper and lower flanges 2a and 2b are welded to the steel pipe column 1, after the fitting plate 5 having the same shape as the notch K is fitted into the notch K, the upper and lower flanges 2a and 2b and the By welding the fitting portion with the fitting plate 5, the beam 2 and the fitting plate 5 are integrated.

When welding the fitting portion between the upper and lower flanges 2a and 2b and the fitting plate 5, as shown in FIG. 5 (a), even if a groove angle is provided on the upper and lower flanges 2a and 2b side, as shown in FIG. As shown in (b), a groove angle may be set on the fitting plate 5 side, or any groove angle may be set. Also, the upper and lower flanges 2
In consideration of welding deformation that occurs during welding of the fitting portion between a and 2b and the fitting plate 5, as shown in FIG. 6, the fitting plate 5 is preliminarily formed by an appropriate angle θ with respect to the upper and lower flanges 2a and 2b. I will tilt it.

[Second Embodiment] FIGS. 7 to 9 show an embodiment (second embodiment) of the method of the present invention having the second feature. In the drawings, the parts indicated by the same reference numerals as those in the first embodiment indicate the same or corresponding parts. In the figure,
Reference numeral 1 denotes a cylindrical steel pipe column, and the vertical length of the steel pipe column 1 is the upper and lower sides of the beam 2 at the planned beam joint position (that is, the position where the beam 2 is to be joined to the steel pipe column 1). A gusset plate 4 longer than the length is vertically attached by a welding method as appropriate, and the beam 2 is joined via the gusset plate 4. The beam 2 is specifically
The upper and lower flanges 2a and 2b and the web 2d in the middle between them are integrally formed of H-section steel. Also,
Both end surfaces of the beam 2 are concave surfaces 2e that are arcuate in plan view so as to extend along the outer peripheral surface of the steel pipe column 1.

At both ends of the upper and lower flanges 2a, 2b, half or approximately half the width of each end (in this embodiment, the width is about half the width, but the gusset plate 3 is attached). Depending on the position, the width may be just half), and a notch K is formed in advance by notching by a length exceeding the width of the gusset plate 4.

Similar to the first embodiment, the beam 2 having the notch K is horizontally inserted into the beam joining planned portion between the adjacent steel pipe columns 1 and the gusset plate 4 is formed by using the high-strength bolt 6. Attached to. Then, when the upper and lower flanges 2a and 2b are welded to the steel pipe column 1, after the fitting plate 5 having the same shape as the notch K is fitted into the notch K, the upper and lower flanges 2a and 2b and the Fitting plate 5
The beam 2 and the fitting plate 5 are integrated by welding the fitting portion of

[Other Embodiments] In any of the first embodiment and the second embodiment, the upper and lower flanges 2a,
The two notches K formed in advance at both ends of 2b are preferably formed on the front side of the beam 2 in the horizontal insertion direction, but one is formed on the front side of the beam 2 in the horizontal insertion direction, and
An embodiment in which the other side is formed on the front side in the horizontal insertion direction of the beam 2 is also conceivable. In this embodiment, when the beam 2 is inserted in the horizontal direction, the beams 2 are first made adjacent to each other while the beam 2 is crossed with the beam center line connecting the adjacent steel pipe columns 1 in a plan view. After diagonally inserting between the steel pipe columns 1, the beam 2 is horizontally rotated in an appropriate direction so that the beam 2 can be attached to the gusset plate 3 while being inserted in the horizontal direction.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of the method of the present invention.

FIG. 2 is a side view of the first embodiment.

FIG. 3 is a plan view of the first embodiment.

FIG. 4 is a plan view showing a beam inserting operation in the first embodiment.

FIG. 5 is an explanatory view showing a welding groove formed on a flange or a fitting plate.

FIG. 6 is an explanatory view showing a fitted state (before welding) of a fitting plate.

FIG. 7 is a front view showing a second embodiment (construction completed state) of the method of the present invention.

FIG. 8 is a plan view of the second embodiment (partially welded incomplete state).

FIG. 9: Second embodiment (state with gusset plate attached)
Front view of

FIG. 10 is a plan view showing a conventional steel pipe column and beam.

FIG. 11 is a front view showing a gusset plate having a short vertical length.

FIG. 12 is a front view showing a gusset plate having a long vertical length.

[Explanation of symbols]

 1 Steel Pipe Column 2 Beams 2a, 2b Flange 2d Web 2e Concave Surface 3,4 Gusset Plate 5 Fitting Plate K Notch

Claims (2)

[Claims] 1. A vertical length at a beam-joining planned location of a steel pipe column (1) to which a beam (2) of H-shaped steel composed of both upper and lower flanges (2a), (2b) and a web (2d) is joined. Is shorter than the vertical length of the beam (2), the gusset plate (3)
Through the gusset plate (3), the beam (2) having a concave surface (2e) in a plan view arcuate shape so that both end surfaces are along the outer peripheral surface of the steel pipe column (1) is joined to the beam. A method for joining a steel pipe column and a beam to be joined at a predetermined location, comprising: a notch (K) formed by notching a half width or a substantially half width of an end portion of the upper and lower flanges (2a), (2b), The beams (2) having the notches (K) are formed in advance on both ends of the upper and lower flanges (2a), (2b), and the beams are to be joined to the adjacent steel pipe columns (1) from the horizontal direction. After inserting and attaching to the gusset plate (4), the upper and lower flanges (2a), (2b) are attached to the steel pipe column (1).
When welding to, the fitting plate (5) having the same shape as the notch (K) is fitted into the notch (K), and then the upper and lower flanges (2a), (2b) and the fitting A method of joining a steel pipe column and a beam, wherein the beam (2) and the fitting plate (5) are integrated by welding a fitting portion with the plate (5). 2. The upper and lower lengths of a steel pipe column (1) to which a beam (2) of H-shaped steel, which is composed of both upper and lower flanges (2a), (2b) and a web (2d), are to be joined. A gusset plate (4) longer than the vertical length of the beam (2)
A method of joining a steel pipe column and a beam, wherein the beam (2) is joined to the planned beam joining position through the gusset plate (4), and the upper and lower flanges (2a), (2b) A notch (K) formed by notching a half width or a substantially half width of the end portion by a length exceeding the width of the gusset plate (4) is provided at both ends of the upper and lower flanges (2a), (2b). The beam (2), which is formed in advance and has the cutout portion (K), is horizontally inserted into a planned beam-joining place between the adjacent steel pipe columns (1) and attached to the gusset plate (4). After that, the upper and lower flanges (2a) and (2b) are attached to the steel pipe column (1).
When welding to, the fitting plate (5) having the same shape as the notch (K) is fitted into the notch (K), and then the upper and lower flanges (2a), (2b) and the fitting A method of joining a steel pipe column and a beam, wherein the beam (2) and the fitting plate (5) are integrated by welding a fitting portion with the plate (5).