JPH10147999A - Vibration control steel sheet unit and vibration control wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To flexibly cope with a plane of structure having an opening for traffic or a through opening for a duct or a pipe by utilizing the energy absorption by the shearing stress of energy absorbing steel sheets, and making the energy absorbing steel sheets and studs modular to form a vibration control steel sheet unit. SOLUTION: Studs 5 are erected at the prescribed intervals in a plane of structure surrounded by the girders 2A, 2B and columns 3A, 3B of a steel frame, and multiple energy absorbing steel sheets 6 are arranged between the studs 5. The studs 5 are fitted to the girders 2A, 2B by fasteners 7 at some plays in the axial direction of the fasteners 7, the steel sheets 6 are suspended and fixed between the studs 5 at slight gaps between the steel sheets 6. The studs 5 and steel sheets 6 are made modular in size according to the steel frame in advance. An opening section on a plane of structure surrounded by the upper and lower beams and the right and left columns in the steel frame can be flexibly coped with, it can be easily fitted, and the cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a damping steel plate unit and a damping wall.

[0002]

2. Description of the Related Art One of the vibration damping methods for incorporating a vibration damper into a steel structure is a steel plate shear wall. This steel plate earthquake-resistant wall has a steel plate attached to the entire surface between columns and beams. According to this method, it is difficult to provide an opening for passage or a through opening for a duct or a pipe, the arrangement is limited, and effective vibration suppression cannot be realized. In addition, since a heavy steel plate is mounted on the entire surface of the structure, the mounting is difficult, and there is a problem that replacement when the steel plate earthquake-resistant wall is damaged is troublesome.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the prior art, and is intended to flexibly provide a structure having an opening for passage and a through opening for ducts and pipes. Correspondence, the arrangement of openings is not limited, effective vibration suppression can be realized, installation work is easy, cost reduction is achieved, and replacement work in case of breakage is made easy. And to provide a damping wall.

[0004]

As a means for technically solving the above-mentioned problems, the present invention relates to a vibration-damping steel sheet unit incorporated in all or a part of a construction surrounded by upper and lower beams and left and right columns. The gist of the present invention includes a stud attached to the upper and lower beams and a plurality of energy absorbing steel plates attached between the studs, and these are modularized and formed. In addition, the gist of the present invention is a vibration control wall in which a construction surface surrounded by upper and lower beams and left and right columns is divided into a plurality of surfaces, and a unitized energy absorbing steel plate is arranged on these division surfaces. Furthermore, the gist is that all or a part of the energy absorbing steel sheet is an extremely low yield point steel sheet.

[0005]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of a damping steel plate unit 1 according to the present invention, in which a steel frame is surrounded by upper and lower girders 2A and 2B and left and right columns 3A and 3B (see FIG. 3). The studs 5 are erected at predetermined intervals in the stud 4, and a plurality of energy absorbing steel plates 6 are disposed between the studs 5.

The stud 5 is attached to the upper and lower girders 2A, 2B with a stopper 7 such as a pin or a bolt with some play in the axial direction of the stopper. The steel plates 6 are inserted and fixed, and a slight gap is provided between the upper and lower energy absorbing steel plates 6. The dimensions of the stud 5 and the energy absorbing steel plate 6 are modularized in advance according to the steel frame structure. If necessary, a rib plate (not shown) can be provided at the end of the energy absorbing steel plate 6.

The energy absorbing steel plate 6 is formed of, for example, an extremely low yield point steel (hereinafter, an extremely mild steel), and absorbs energy by shear yielding when deformed in a horizontal direction during an earthquake or the like as shown in FIG. . In FIG. 1, reference numeral 8 denotes a slab.

[0008] The vibration damping steel plate unit 1 thus formed
Can be incorporated into a steel frame, for example, as shown in FIGS. Fig. 3 (a) shows the upper and lower girders 2A, 2A
5 shows an example in which B is incorporated in the entire surface 4 surrounded by left and right columns 3A and 3B. At this time, the left and right pillars 3A,
An appropriate gap is formed between 3B and the pillar 5 at both ends.

FIG. 3 (b) shows an example in which the upper and lower girders 2A and 2B and the left and right pillars 3A and 3B are incorporated in a part of a construction surface 4 surrounded by the pillars. And four energy absorbing steel plates 6 are arranged between them.

FIG. 3C shows an example in which an opening such as an entrance 4a is provided in a construction surface 4 surrounded by upper and lower girders 2A and 2B and left and right columns 3A and 3B. A plurality of energy absorbing steel plates 6 are erected at predetermined positions, and the energy absorbing steel plate 6 is attached only to the uppermost portion of the section near the column 3B, which becomes the entrance 4a, and the column near the column 3A. Is an opening 4b. The entrance 4a and the opening 4b are not limited to the locations shown in the figure, but can be provided at any locations on the structural surface 4.

FIG. 3D shows a duct opening 4c in a construction surface 4 surrounded by upper and lower girders 2A and 2B and left and right columns 3A and 3B.
This is an example in which the duct opening 4c is formed without attaching the energy absorbing steel plate 6 to the uppermost part only in the two sections at the center. Each of the left and right sections is provided with four energy absorbing steel plates 6. The duct opening 4c is not limited to the illustrated location, but can be provided at any location on the structural surface 4.

The damping steel plate unit 1 has a small thickness,
Since it fits in a space smaller than the beam width of the girders 2A and 2B, the degree of freedom in plan and design is high, and it is possible to flexibly cope with any wall setting.

In this manner, the damping wall is easily formed by disposing the damping steel plate unit 1 in the construction surface 4 surrounded by the upper and lower girders 2A, 2B and the left and right columns 3A, 3B. When an external force is applied during an earthquake or the like, the vibration energy can be absorbed by the shear stress of the energy absorbing steel plate 6, and the effect as a vibration damping wall can be sufficiently exhibited.

Further, in the event of a large earthquake, the energy absorbing steel plate 6 which is extremely mild steel shears and yields efficiently to absorb energy, leaving harmful residual deformation in the frames such as the girders 2A, 2B and columns 3A, 3B. There is no. For this reason, when repairing after an earthquake, it is sufficient to replace the damping steel plate unit 1, and when it is partially broken, it is only necessary to replace only the damaged portion. Therefore, the replacement operation is simple, and the time and cost required for the operation can be minimized.

The rigidity, yield strength, etc. of the damping steel plate unit 1 can be easily adjusted by changing the size of the energy-absorbing steel plate 6, that is, the length and width, and the thickness. It is possible to adjust.

FIGS. 4 (a) and 4 (b) show an embodiment of the damping wall according to the present invention, in which a structural surface 14 surrounded by upper and lower girders 12A and 12B and left and right columns 13A and 13B. Is divided into a plurality of surfaces (six in the example in the figure), and the energy-absorbing steel plates 17A to 17F are provided on each of the divided surfaces.

In this case, the uppermost energy absorbing steel plates 17A and 17B are connected to the upper beam 12A with fasteners such as high-strength bolts, and the lowermost energy absorbing steel plates 17E and 17B.
17F is connected to the lower girder 12B with a fastener (not shown) such as a high-strength bolt, and energy absorbing steel plates 17A and 17B, 17C and 17D, and 17E and 17F adjacent to each other in the lateral direction are longitudinal ribs formed at the ends. 18 (see FIG. 5)
The energy absorbing steel plates 17A, 17B and 17E, 17B, 17D and 17F adjacent to each other in the vertical (up and down) direction are connected and integrated with the horizontal ribs 19 (see FIG. Become

The energy absorbing steel plates 17A to 17F are formed of extremely mild steel. Extreme mild steel can exhibit large hysteretic damping performance from relatively small deformation when shear yielding occurs. Further, only 17C and 17D located in the middle part are made of mild steel, and 17A, 17B, 17E,
17F can be a normal high tensile steel. By using only mild steel as a part and ordinary steel (high-tensile steel) as others, the shear strain at the yield site can be further increased,
This makes it possible to limit the parts that exhibit the damper effect, and facilitate inspection and replacement after an earthquake.

Further, as shown in FIGS. 5 (a) and 5 (b), each energy absorbing steel sheet (in the illustrated example, energy absorbing steel sheet 17) is used.
E) The rib plates 21 may be juxtaposed at regular intervals (partially omitted) on both surfaces of the upper and lower ends as needed to prevent out-of-plane buckling. In FIG. 5A, reference numeral 22 denotes a slab, and in FIG. 5B, reference numeral 23 denotes an auxiliary member located in the slab 22.

The damping wall thus constructed has the same external form as that of a general steel plate earthquake-resistant wall, and has no special restrictions on a structural plan and an architectural plan. Can be included in the design work. Further, as compared with the conventional braces, the steel material has a large cross-sectional area, so that a vibration damping structure having a large proof strength and rigidity can be obtained, and energy can be efficiently absorbed.

When an external force is applied during an earthquake or the like, the energy absorbing steel plates 17A to 17
Vibration energy can be absorbed by the shear stress of F, and it can fully function as a damping wall. When a part is destroyed in the event of a large earthquake, etc., only the destroyed energy absorbing steel plate is replaced. As a result, the replacement operation is simple, and the operation time and cost can be minimized. If a more effective material is developed in the future, it is possible to replace the plate with the material.

The vibration damping wall according to the present invention can be easily transported, mounted and replaced by being made into a unit, which is a great advantage particularly in the seismic strengthening and repair plan of existing structures. Furthermore, since the response at the time of an earthquake becomes small, it becomes possible to make a cross section small compared with a normal steel frame structure, and it can contribute to cost reduction.

[0023]

As described above, according to the present invention,
Utilizing the energy absorption due to the shear stress of the energy absorbing steel plate, the energy absorbing steel plate and the studs were modularized to form the damping steel plate unit, so it was surrounded by the upper and lower beams and the left and right columns in the steel frame. It can flexibly cope with cases where there is an opening on the construction surface,
In addition, installation is easy and cost can be reduced, the thickness is thin, the degree of freedom in planning and design is high, the yield stress is small, no harmful residual deformation is left in the building, and replacement work after an earthquake is also possible It has excellent effects such as being easy and inexpensive. In addition, since the construction surface surrounded by the upper and lower beams and the left and right pillars is divided into a plurality of surfaces, and a unitized energy absorbing steel plate is arranged on each of these divided surfaces to form a vibration damping wall. Energy can be absorbed by the shear stress of the energy absorbing steel plate, and it can fully function as a vibration damping wall. When a part is broken, only the broken energy absorbing steel plate needs to be replaced, and replacement work is easy. In addition, the present invention has excellent effects such as minimizing work time and cost.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of a damping steel sheet unit according to the present invention.

FIG. 2 is an explanatory diagram showing a state when an external force is applied to a damping steel plate unit.

Fig. 3 shows an example of incorporating a damping steel plate unit into a steel frame, where (a) is provided on the entire surface surrounded by upper and lower beams and left and right columns, and (b) is a part of the structure. When installing in the section,
(C) is an explanatory diagram of a case where an opening such as an entrance is provided, and (D) is an explanatory diagram of a case where a duct opening is provided.

FIGS. 4A and 4B show an embodiment of the vibration damping wall according to the present invention, wherein FIG. 4A is a schematic front view, and FIG. 4B is a schematic sectional view thereof.

FIG. 5 shows a part of the damping wall, in which (a) is a schematic front view and (b) is a schematic sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Damping steel plate unit 2A, 2B ... Beam 3A, 3B ... Column 4 ... Surface 4a ... Doorway 4b ... Opening 4c ... Duct opening 5 ... Stud 6 ... Energy absorption steel plate 7 ... Stopper 8 ... Slab 12A, 12B ... girder 13A, 13B ... pillar 14 ... structural surface 17A-17F ... steel plate for energy absorption 18 ... vertical rib 19 ... horizontal rib 20 ... stopper 21 ... rib plate 22 ... slab 23 ... auxiliary material

Claims (3)

[Claims] 1. A damping steel plate unit to be incorporated into all or a part of a structure surrounded by upper and lower beams and left and right columns, comprising: a stud mounted on the upper and lower beams; and a plurality of sheets mounted between the studs. A vibration damping steel sheet unit comprising an energy absorbing steel sheet and modularizing them. 2. A vibration damping wall wherein a construction surface surrounded by upper and lower beams and left and right columns is divided into a plurality of surfaces, and unitized steel plates for energy absorption are arranged on these divided surfaces. 3. The damping wall according to claim 1, wherein all or a part of the energy absorbing steel sheet is an extremely low yield point steel sheet.