JPH0721927U - Damping studs using low yield point steel - Google Patents

Abstract

(57) [Summary] [Purpose] Damping a steel structure by damping studs, and providing free openings such as corridors and doors in the area surrounded by steel main columns and steel beams. To [Structure] A steel bracket 3 is fixed to the central portion of a steel beam 2 on the upper and lower floors of a steel frame building 1, and a low yield point steel material 4 is interposed between the tip portions of the steel brackets 3 to form a joint plate 5. And fix with bolts 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to a vibration damping stud using a low yield point steel material provided in a steel building.

[0002]

[Prior art]

 BACKGROUND ART Conventionally, as a vibration damping device used for a steel frame building, as disclosed in (1) Japanese Utility Model Laid-Open No. 3-99155, a mounting wall is made up of a viscoelastic material by a vertical end of a concrete wall body. A structure in which a metal fixture is sandwiched between layers, and a fixing metal member is fixed to the other upper and lower ends of the wall body; (2) Steel plate as disclosed in JP-A-3-183873 A large number of holes are staggered in the middle part of the structure in two directions, and the steel plate around the holes bends and yields to absorb energy against tensile or compressive force. A device configured to suppress vibration is known.

[0003]

[Problems to be solved by the device]

 In the case of each of the conventional vibration damping devices described above, since the vibration damping device is installed in the entire area surrounded by columns and beams, it is not possible to provide a free opening such as a corridor or door in this area. There is a problem.

[0004]

[Means for Solving the Problems]

 In order to advantageously solve the above-mentioned problems, in the vibration damping stud using the low yield point steel material of the present invention, a steel bracket is provided at the center of the steel beam 2 on the upper and lower floors of the steel building 1. 3 are fixed, and a low yield point steel material 4 is interposed between the tip ends of the steel brackets 3 and fixed with joint plates 5 and bolts 6. Further, the steel beam 7 on the upper floor has a shape having a lower edge descending from both ends toward the center and a horizontal upper edge, and the steel bracket 3 is fixed to the upper center of the steel beam 8 on the lower floor, Between the lower center part of the steel beam 7 on the upper floor and the front end of the steel bracket 3 of the steel beam 8 on the lower floor, the low yield point steel material 4 is interposed and fixed by the joint plate 5 and the bolt 6. By doing so, the above-mentioned problems can be advantageously solved.

[0005]

【Example】

 1 to 4 show a first embodiment of the present invention, in which a steel beam 2 on an upper floor in a steel frame building 1 having a steel main column 9 and a steel beam 2 has a lower central part and a lower part. The lower end of a steel plate having an H-shaped section is fixed by welding to the upper center of the steel beam 2 of the floor, and the base end portions of the steel brackets 3 each have the same section as the steel bracket 3. Reinforcement stiffeners 11 extending vertically and laterally are fixed to both surfaces of the web 10 of the material 4 by welding, and the web 10 and the flange 12 at both ends of the low yield point steel material 4 and the steel bracket 3 The steel 13 is fixed to the web 13 and the flange 14 at the tip end of each of the steel brackets 5, and the steel brackets 3 and the vibration damping studs connected to the brackets 3 are formed.

FIGS. 5 to 9 show a second embodiment of the present invention, in which a steel beam 2 on the upper floor and a steel beam 2 on the lower floor of a steel frame building 1 are provided. The base ends of steel brackets 3 each having a long H-shaped cross section are fixed to the upper center by welding, and the gaps between the top ends of the upper and lower steel brackets 3 are shorter than the length of the steel brackets 3. Are provided, and a plurality of low-yield-point steel materials 4 each having a U-shaped cross section are arranged over the front and back surfaces of the upper and lower steel brackets 3, and both ends of each low-yield-point steel material 4 are made of steel braces. The support plate 15 fixed to the flange 14 of the racket 3 or the web 13 of the steel bracket 3 is connected to the support plate 15 by bolts 16, and is controlled by the steel brackets 3 and a plurality of low yield point steel materials 4 connected to the steel brackets 3. A stud is constructed.

FIG. 10 shows a third embodiment of the present invention, in which the left and right side portions of the lower end portion of the steel bracket 3 fixed to the lower central portion of the steel beam 2 on the upper floor and the left and right steel portions. A steel cane 17 is arranged and fixed to the main pillar 9 and the vicinity of the joint between the steel beams 2, but the other configurations are the same as those in the second embodiment.

FIG. 11 and FIG. 12 show a fourth embodiment of the present invention, in which a steel beam 7 on the upper floor has a lower edge and a horizontal upper edge descending from both ends thereof toward the central portion. And the base end of the steel bracket 3 is fixed to the upper center of the steel beam 8 on the lower floor by welding, and the lower center of the steel beam 7 on the upper floor and the steel beam on the lower floor are fixed. A plurality of low-yield-point steel materials 4 each having a U-shaped cross section are arranged so as to extend over the tip of the steel bracket 3 fixed to the steel bracket 3. Both ends of each low-yield-point steel material 4 are the steel beam 7 and the steel. The bracket 3 is connected by the same means as in the second embodiment. Further, an opening 18 is provided between the central portion and the end of the steel beam 7 for inserting an air-conditioning air supply pipe, a power transmission cable or the like.

When a horizontal load such as seismic force or large wind force acts on a building having damping studs using the low yield point steel material according to each of the above-described examples, the low yield point steel material 4 is plastically deformed and the building is constructed. Suppress the vibration of.

When the present invention is implemented, a steel material having a low yield strength (for example, 70 to 150 N / mm ² ) and a large elongation (for example, 35 to 55%) is used as the low yield point steel material 4. As a specific example of the steel material, C: 0.005% or less, Si: 0.04% or less, Mn: 0.20% or less, Ti: 0.03 to 0.07%, Al:% by weight. 0.040% or less and N: 0.004% or less are used.

[0011]

[Effect of device]

 According to the present invention, the steel bracket 3 is fixed to the central portion of the steel beam 2 on the upper and lower floors of the steel frame building 1, and the low yield steel material 4 is interposed between the tips of the steel brackets 3. Or fix it with the joint plate 5 and the bolts 6, or make the steel beam 7 of the upper floor a shape having a lower edge and a horizontal upper edge descending from both ends toward the center, and The steel bracket 3 is fixed to the upper center part of the steel plate 8 and the low yield point steel material 4 is provided between the lower central part of the steel beam 7 of the upper floor and the tip of the steel bracket 3 of the steel beam 8 of the lower floor. Since it is fixed by the joint plate 5 and the bolts 6 with the interposition of, the vibration damping studs can control the structure. Therefore, the part surrounded by the steel main columns 9 and the steel beams can be A free opening such as a door can be provided.

[Brief description of drawings]

FIG. 1 is a front view showing a damping stud using a low yield point steel material according to a first embodiment of the present invention.

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

FIG. 3 is a front view showing a part of FIG. 1 in an enlarged manner.

FIG. 4 is an enlarged sectional view taken along line BB of FIG.

FIG. 5 is a front view showing a damping stud using a low yield point steel material according to a second embodiment of the present invention.

6 is a cross-sectional view taken along the line CC of FIG.

FIG. 7 is a front view showing a part of FIG. 5 in an enlarged manner.

8 is a cross-sectional view taken along the line DD of FIG.

9 is a side view of the portion shown in FIG. 7. FIG.

FIG. 10 is a front view showing a damping stud using a low yield point steel material according to a third embodiment of the present invention.

FIG. 11 is a front view showing a damping stud using a low yield point steel material according to a fourth embodiment of the present invention.

FIG. 12 is a front view showing a part of FIG. 11 in an enlarged manner.

[Explanation of symbols]

 1 Steel Structure 2 Steel Beam 3 Steel Bracket 4 Low Yield Point Steel 5 Joint Plate 6 Bolt 7 Steel Beam 8 Steel Beam 9 Steel Main Column 10 Web 11 Reinforcement Stiffener 12 Flange 13 Web 14 Flange 15 Support Plate 16 Bolt 17 Steel cane 18 Opening

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toru Takeuchi, Toru Takeuchi 2-6-3 Otemachi, Chiyoda-ku, Tokyo Within Nippon Steel Corporation (72) Sachio Watanabe 2-1 Shinjuku, Shinjuku-ku, Tokyo -1 Nippon Design Co., Ltd. (72) Creator Hajime Wada 2-1-1 Nishishinjuku, Shinjuku-ku, Tokyo 2-1-1 Japan Design Co., Ltd. (72) Creator Shinzo Konomi 2-1-1 Nishishinjuku, Shinjuku-ku, Tokyo Nippon Design Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. A steel beam 2 on the upper and lower floors of a steel building 1.
A steel bracket 3 is fixed to the center of the steel plate, and a low-yield-point steel material is used, in which a low-yield-point steel material 4 is interposed between the tips of the steel brackets 3 and fixed by a joint plate 5 and bolts 6. Studs. 2. The steel beam 7 on the upper floor is formed into a shape having a lower edge that descends from both ends toward the center and a horizontal upper edge, and the steel bracket 3 is attached to the upper center of the steel beam 8 on the lower floor. The steel plate 7 on the upper floor and the tip of the steel bracket 3 of the steel beam 8 on the lower floor with the low yield point steel material 4 interposed therebetween and the joint plate 5 and the bolt. Damping studs using low yield point steel fixed by 6.