JPH0868111A - Reinforcement method for beam-column joints of steel pipe columns - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the cost of installing shearing reinforcements in the beam-column joints of steel pipe columns. [Structure] The welded joints of the upper and lower sides 4a, 4b of the shear reinforcement 4 arranged along the outer peripheral shape of the steel pipe column 1 are the same as the welded joints for welding the steel pipe column 1 and the upper and lower outer diaphragms 2, 3. It is characterized in that the weld joints of the vertical sides 4c, 4d of the shear reinforcement member 4 are the same as the weld joints for welding the steel pipe column 1 and the web 5c of the H-shaped beam member 5. Reinforcement method for beam-column joints of steel pipe columns. [Effect] The welded joint of the shear reinforcement to the steel pipe column does not increase. Therefore, the number of welding steps does not increase, and the manufacturing cost can be significantly reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of reinforcing a beam-column joint portion of a steel pipe column used in the fields of civil engineering and construction.

[0002]

2. Description of the Related Art Conventionally, a beam-column joint portion in a steel pipe column for civil engineering and construction receives a large shearing force from a beam material, and thus requires a thicker steel pipe cross section than other portions of the steel pipe column. To do.
Therefore, in general, the column-beam joint is reinforced by the method shown in FIGS.

FIG. 3 is a horizontal cross-sectional view of an intermediate portion of upper and lower outer diaphragms showing an example of reinforcement of a beam-column joint portion of a circular steel tubular column in the prior art.

In FIG. 3, in the column-beam joint portion to which the H-shaped beam member 11 is attached via the outer diaphragm 10 while the circular steel pipe column 9 is penetrated, the upper and lower outer diaphragms 1 are attached.
A shear reinforcing material 12 is additionally provided on the outer circumference of the circular steel tube column 9 between 0, and the circular steel tube column 9 and the periphery of the shear reinforcing material 12 are joined by welding.

The welding of the shear reinforcement member 12 to the circular steel pipe column 9 is carried out separately from the welding of the circular steel pipe column 9 and the outer diaphragm 10 and the welding of the circular steel pipe column 9 and the web of the H-shaped beam member 11. Welding of welded joints.

FIG. 4 is a horizontal cross-sectional view of an intermediate portion of upper and lower outer diaphragms showing an example of reinforcement of a beam-column joint portion of a rectangular steel tubular column in the prior art.

In FIG. 4, in the column-beam joint portion where the H-shaped beam member 15 is attached via the outer diaphragm 14 while the rectangular steel pipe column 13 is penetrated, the rectangular steel pipe column between the upper and lower outer diaphragms 14 is attached. A shear reinforcing material 16 is additionally provided on the outer circumference of 13, and the rectangular steel tube column 13 and the periphery of the shear reinforcing material 16 are joined by welding.

The welding of the shear reinforcement member 16 to the rectangular steel pipe column 13 is different from the welding of the rectangular steel pipe column 13 and the outer diaphragm 14 and the welding of the rectangular steel pipe column 13 and the web of the H-shaped beam member 15. Welding of welded joints.

FIG. 5 is a vertical cross-sectional view showing an example of reinforcement of a beam-column joint portion of a steel pipe column in another conventional technique.
The diaphragms 17 and 18 are of a through diaphragm type, and between the diaphragms 17 and 18 above and below the column-beam joint,
Steel pipe column member 20 having a plate thickness thicker than the plate thickness of another steel pipe column 19
Is used to increase the shear strength of the column-beam joint.

[0010]

The method of reinforcing the beam-column joint portion of the steel pipe column according to the above-mentioned prior art has the following problems.

The column-beam joint of the circular steel pipe column shown in FIG. 3 described above welds the steel pipe column 9 and the outer diaphragm 10 and the steel pipe column 9 and the web 11a of the H-shaped beam member 11, and further, A plurality of shear reinforcement materials 12 are additionally provided, and the shear reinforcement materials 12 are attached.
It was necessary to additionally add fillet welding to the steel pipe column 9 over the entire circumference thereof, and the welding labor was doubled, resulting in a large number of man-hours for welding work.

Further, also in the beam-column joint portion of the rectangular steel pipe column shown in FIG. 4, the shear reinforcement material is added in the same manner as the addition of the shear reinforcement material 12 at the column-beam joint portion of the circular steel pipe column shown in FIG. It is necessary to additionally perform fillet welding on the entire circumference of the steel pipe column 13 for the entire circumference of the pipe 16, which requires double welding time and man-hours for welding work.

Further, in the beam-column joint portion of the steel pipe column shown in FIG. 5, the steel pipe column member 20 of the column-beam joint portion and other steel pipe columns 19
Requires a steel tube column having a plate thickness different from that of the above-mentioned portion, and welding must be performed for the diaphragms 17 and 18 with the upper and lower steel tube columns 19 and the steel tube column member 20 so as to be completely melted. The welding groove of No. 20 was enlarged, and even in this method, the labor of welding work was great.

[0014]

In order to solve the above-mentioned problems, the present invention is a welding in which the weld joints on the upper and lower sides of the shear reinforcement provided along the outer peripheral shape of the steel pipe column weld the steel pipe column and the outer diaphragm. A column of a steel pipe column, which is constructed in the same manner as a joint, and in which the welded joint on the vertical side of the shear reinforcement is constructed in the same manner as a welded joint for welding a steel pipe column and a web of H-shaped beam material. It is solved by the method of reinforcing the beam joint.

[0015]

According to the present invention, the upper and lower sides of the shear reinforcement member are used for welding the steel pipe column and the outer diaphragm, and the vertical sides of the shear reinforcement member are used for web welding of the steel pipe column and the H-shaped beam. Each of them is composed of the same welded joint, and the shear reinforcement is welded to the steel pipe column.

[0016]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing an attachment structure of a shear reinforcement member in a beam-column joint portion of a steel pipe column of the present invention.

In FIG. 1, reference numeral 1 is a steel pipe column, 2 is an upper outer diaphragm joined to the steel pipe column 1 by a weld joint B, and 3 is a lower portion similarly joined to the steel pipe column 1 by a weld joint B. It is an outer diaphragm.

Reference numeral 4 denotes a shear reinforcement material according to the present invention, which is arranged in a shape along the outer peripheral shape of the steel pipe column 1. The upper side 4a of the shear reinforcement member 4 is the same weld joint as the weld joints C and D with the steel pipe column 1 of the upper outer diaphragm 2.

Similarly, the lower side 4b of the shear reinforcement member 4 is similarly welded to the steel pipe column 1 of the lower outer diaphragm 3, and
It has the same welded joint.

Therefore, the upper and lower sides 4a, 4 of the shear reinforcement 4 are
b is welded at the same time when the steel pipe column 1 and the upper and lower outer diaphragms 2 and 3 are welded, since they are the same welded joint C, D, E and F.

Reference numerals 5 and 6 are H-shaped beam members, and the upper and lower flanges 5a, 5b and 6a, 6b of the H-shaped beam members 5 and 6 are welded to the outside of the upper and lower outer flanges 2 and 3, respectively. Further, the webs 5c and 6c of the H-shaped beam members 5 and 6 are welded to the steel pipe column 1.

FIG. 2 is a sectional view taken along the line AA of FIG.
FIG. 2 shows an example in which four H-beam members 5, 6, 7, and 8 are attached to the steel pipe column 1. The upper outer diaphragm 2 is welded around the steel pipe column 1, and the flanges 5a, 6a, 7 of the H-shaped beam members 5, 6, 7, 8 are attached to the upper outer diaphragm 2.
a and 8a are welded.

The vertical side 4c of the shear reinforcement member 4 in the present invention,
When the webs 5c, 6c, 7c and 8c of the H-shaped beam members 5, 6, 7 and 8 are welded to the steel pipe column 1, 4d are welded a and b according to the number of webs in the same weld joint. , C, d,
Welded by e, f, g and h.

In the practice of the invention, the inner peripheral surfaces of the upper and lower outer diaphragms 2, 3 and the ends of the webs 5c, 6c, 7c, 8c of the H-shaped beam members 5, 6, 7, 8 have K A weld groove is formed. In addition, if necessary, the shear reinforcement material 4
Weld grooves are also formed on the upper and lower sides 4a, 4b and the vertical sides 4c, 4d.

Therefore, by filling the weld groove portion with the weld metal by welding, the upper and lower sides 4a and 4b of the shear reinforcement member 4 are formed of the same welded joint between the steel pipe column 1 and the upper and lower outer diaphragms 2 and 3. Since the welded portions are the same, the vertical sides 4c and 4d of the shear reinforcement member 4 are
And the webs 5c, 6c, 7c, and 8c of the H-shaped beam are made of the same welded joint, so that the welded portions are the same.

Although the embodiment has been described by taking a steel pipe column having a circular cross section as an example, the steel pipe column targeted by the present invention is not limited to the one having a circular cross section, and is applied to a steel pipe column having a rectangular cross section, for example. Also achieves the effects desired by the present invention.

[0027]

As described above, according to the present invention, the welded joints on the upper and lower sides of the shear reinforcing material arranged along the outer peripheral shape of the steel pipe column are the same as the welded joint for welding the steel pipe column and the outer diaphragm. And a welded joint on the vertical side of the shear reinforcement,
Since it has the same structure as the weld joint for welding the steel tube column and the web of the H-shaped beam, it is not necessary to increase the number of new weld joints despite the addition of the shear reinforcement material, so the welding man-hour is reduced. To be done.

Further, since the work of attaching the shearing reinforcement to the beam-column joint portion of the steel pipe column is simplified, the manufacturing cost of the beam-column joint portion of the steel pipe column can be greatly reduced.

[Brief description of drawings]

FIG. 1 is an elevational sectional view showing an attachment structure of a shear reinforcement member in a beam-column joint portion of a steel pipe column of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a horizontal cross-sectional view of an intermediate portion of the upper and lower outer diaphragms showing an example of reinforcement of a beam-column joint portion of a conventional circular steel tubular column.

FIG. 4 is a horizontal cross-sectional view of an intermediate portion of the upper and lower outer diaphragms showing an example of reinforcement of a beam-column joint portion of a rectangular steel tubular column of the related art.

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

[Explanation of symbols]

 1 Steel tube column 2 Upper outer diaphragm 3 Lower outer diaphragm 4 Shear reinforcement 4a Upper side of shear reinforcement 4b Lower side of shear reinforcement 4c ・ 4d Vertical side of shear reinforcement 5 ・ 6 ・ 7 ・ 8 H-shaped beam 5c ・ 6c・ 7c / 8c H-shaped beam web

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazumi Sawamura 1-2 1-2 Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Haruhito Okamoto 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Date Inside the Steel Pipe Co., Ltd. (72) Inventor Nobuyuki Nakamura 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Inside Nihon Steel Pipe Co., Ltd.

Claims (1)

[Claims] 1. A welded joint at the upper and lower sides of a shear reinforcement member arranged along the outer peripheral shape of a steel pipe column is configured the same as a welded joint for welding a steel pipe column and an upper and lower outer diaphragm, and the shear reinforcement member is formed. The method for reinforcing a column-beam joint portion of a steel pipe column, wherein the welded joint on the vertical side is the same as the welded joint for welding the steel pipe column and the web of the H-shaped beam material.