JP2000328810A - Damping frame - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a vibration control frame capable of realizing a building having high vibration control performance. SOLUTION: In a skeleton 1, shearing deformation of the skeleton 1 is effectively suppressed by a brace 7 having a damper function incorporated in a multi-story shear wall 3, and bending of the skeleton 1 by a damper incorporated in a boundary beam 4. Deformation is effectively suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control frame suitable for use in improving the vibration control performance of various high-rise buildings such as buildings and condominiums.

[0002]

2. Description of the Related Art In recent years, it has been desired to increase the safety of buildings against earthquakes. In response to this, various seismic isolation / vibration control structures have been developed to enhance the seismic performance of buildings.
Generally, in such a seismic isolation / vibration control structure, depending on the shape of the building, the response at the time of the earthquake is considered to be either bending deformation or shear deformation. Therefore, various types of dampers effective for shear deformation of the entire building are incorporated into walls, braces, or the like, or dampers effective for bending deformation of the entire building are incorporated.

[0003]

However, as for the deformation of a building during an actual earthquake, of the bending deformation or the shearing deformation, the one assumed at the time of design is not always predominant, and both the bending deformation and the shearing deformation are required. Because it is possible to show more complicated behavior, it has been desired to develop a more effective vibration control frame. The present invention has been made in consideration of the above points, and has as its object to provide a vibration damping frame capable of realizing a building having higher vibration damping performance.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a frame having two or more multi-story shear walls vertically continuous with each other, wherein a plurality of multi-story shear walls are arranged at regular intervals. Boundary beams are provided at predetermined intervals in the vertical direction, and the boundary beam has a bending deformation absorbing damper that suppresses vertical relative displacement between the multi-story shear walls due to bending deformation of the frame on both sides thereof. It is characterized in that a shear deformation absorbing damper that suppresses shear deformation of the frame is provided on the multi-story earthquake-resistant wall.

[0005] When the frame is bent and deformed during an earthquake, the relative displacement in the vertical direction between the two laminated shear walls is input to the boundary beam provided between the two laminated shear walls. Damped by absorption damper. Further, when the frame undergoes shear deformation during an earthquake, the deformation is suppressed by a shear deformation absorbing damper provided on the multi-story shear wall.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vibration damping frame according to the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a frame (vibration damping structure) of a building such as a high-rise building or an apartment. The skeleton 1 is provided with a core wall 2 having a rectangular shape in a plan view, for example, at the center thereof. The core wall 2 has a structure in which multi-layered earthquake-resistant walls 3 having an L-shaped cross section are arranged at four corners thereof, and boundary beams 4 are provided between the adjacent multilayered earthquake-resistant walls 3.

The multi-story anti-seismic wall 3 incorporates, as a seismic element, a brace 7 arranged between the columns 5 and the beams 6 in a C-shape. Strength has been increased.

As shown in FIG. 2, each brace 7 is a so-called viscoelastic brace damper (shear deformation absorbing damper) 8 having a damper function, the upper end 7a of which is a bracket provided on the upper beam 6. 9A, and the lower end 7b side is joined to a bracket 9B provided at the joint between the lower beam 6 and the column 5. Then, as shown in FIG. 2B, in the middle part of the brace 7, the steel plate 7c integrated on the upper end 7a side and the steel plate 7d integrated on the lower end 7b side alternately at a predetermined interval. It is configured such that a viscoelastic body 7e such as a rubber asphalt type is interposed between the steel plates 7c and 7d.

Accordingly, when a horizontal interlayer displacement occurs between the beams 6 and 6 positioned above and below each other due to the shear deformation of the frame 1 during an earthquake, the upper end 7a of the brace 7 due to the input of the displacement is provided. The relative displacement in the axial direction between the steel plate 7c and the steel plate 7d on the lower end 7b side is absorbed by the viscoelastic body 7e, and the interlayer displacement is attenuated. In this way,
By incorporating the brace 7, which is a viscoelastic brace damper 8, the multi-story earthquake-resistant wall 3 exerts a large vibration damping effect on the shear deformation of the skeleton 1.

Further, as shown in FIG.
Are arranged at predetermined intervals in the vertical direction between the adjacent multi-story earthquake-resistant walls 3. The relative displacement along the substantially vertical direction between the multi-story shear walls 3 on both sides due to bending deformation of the skeleton 1 is input to each boundary beam 4.

As shown in FIG. 3, both ends of each boundary beam 4 are buried in a mounting base 10 provided on a side surface of a column 5 constituting the multi-story shear walls 3 on both sides thereof. At both ends of the boundary beam 4, screw rebars 11 fixed in the mounting base 10 penetrate through holes formed in the upper and lower flanges 4 a and 4 b, respectively, and are fastened and fixed with lock nuts 12. . In this case, the stress of the boundary beam 4 is transferred by the screw reinforcing bar 11.

The boundary beam 4 is provided with a damper (bending deformation absorbing damper) 14 for absorbing a stress inputted when the multi-story shear walls 3 on both sides are relatively displaced in the vertical direction. The damper 14 is incorporated in the middle part of the boundary beam 4. The web 4 c is cut out in the middle part of the boundary beam 4, and instead, a plate 14 a made of, for example, ultra-low-fall steel or lead is incorporated. This constitutes a history damper.

By the boundary beam 4 incorporating the damper 14, the relative displacement of the multi-story shear walls 3 and 3 along the substantially vertical direction due to the bending deformation of the frame 1 during an earthquake is suppressed by the damper 14. , So that the skeleton 1
Can be suppressed from bending deformation.

In the frame 1 having the above-described structure,
The brace 7 having a damper function incorporated in the multistory shear wall 3 effectively suppresses the shear deformation of the skeleton 1, and the damper 14 incorporated in the boundary beam 4 allows the skeleton 1 to be deformed.
Is effectively suppressed. Therefore, the skeleton 1 exhibits an effective vibration damping effect against both bending deformation and shear deformation during an earthquake. Even if the skeleton 1 shows complicated behavior due to bending deformation and shear deformation during an earthquake, extremely high vibration damping is achieved. The effect can be exhibited. Moreover, as a damper to be incorporated in the brace 7 or the boundary beam 4, for example, a viscoelastic brace damper 8 or a hysteretic damper 1
4, the above configuration can be realized at low cost.

In the above embodiment, for example, the viscoelastic brace damper 8 is incorporated into the brace 7 of the multi-story shear wall 3, but the present invention is not limited to this.
Other types of dampers can be employed as long as the shear deformation of the above can be effectively suppressed.

For example, as shown in FIG. 4, the brace 7 has a hysteresis brace damper (shear deformation absorbing damper) 2.
It is also possible to use 0. This brace damper 2
Reference numeral 0 denotes a so-called unbonded brace damper. A core steel frame 20a made of an extremely low yield point steel is provided between both ends of the brace 7, and a main bar 20b and a hoop bar 20c are arranged around the core bar 20a. And main muscle 2
0b and the hoop 20c are integrated by, for example, fiber reinforced concrete 20d. In addition, core steel 2
A peripheral material such as a sponge is disposed on the outer peripheral surface of the core 0a, for example, to marginally attach the core steel frame 20a to the surrounding fiber-reinforced concrete 20d. In such a brace damper 20, the axial displacement inputted to both ends of the brace 7 is attenuated by the hysteresis deformation of the core steel frame 20a made of extremely low yield point steel.

Further, the present invention is not limited to the structure in which the brace 7 having a damper function is incorporated in the multi-story shear wall 3 as described above.
For example, it is possible to incorporate a wall damper into the multi-story earthquake-resistant wall 3.

For example, as shown in FIG. 5, a wall 21 is provided between the column 5 and the beam 6 constituting the multi-story earthquake-resistant wall 3, and various viscous or hysteretic systems are provided between the wall 21 and the beam 6. It is possible to adopt a configuration in which a damper (shear deformation absorbing damper) 22 is incorporated. In addition, the wall body of the column 5 and the beam 6 may have a damper function by being formed of, for example, extremely low yield point steel. As long as a damper effective for shear deformation of the skeleton 1 is incorporated in the multi-story earthquake-resistant wall 3 in this manner, any type or structure other than those described above may be used.

In the above-described embodiment, the end of the boundary beam 4 is fixed by the threaded reinforcing bar 11. Alternatively, as shown in FIG. A core steel frame 23 may be provided, and this may be embedded in the mounting base 10.

Further, the dampers incorporated in the multi-story earthquake-resistant wall 3 and the boundary beams 4 may be of different types for each floor so that a plurality of types of dampers can be used, or different dampers can be mixed on the same floor. It is also possible to adopt a configuration in which a damper is incorporated only in a specific floor.

In addition, in the above embodiment, the multi-story earthquake-resistant wall 3 is incorporated as the core wall 2 arranged at the center of the building. However, the present invention is not limited to this. , Cylindrical core wall 2
May be arranged, and only the multistory earthquake-resistant wall 3 may be arranged in a direction according to the shape of the building.

In addition, in the above embodiment, the frame 1 itself may have any structure, such as a reinforced concrete structure, a steel frame structure, a steel frame reinforced concrete structure, a filled steel pipe concrete structure, or the like.

Other than this, any configuration may be adopted as long as it does not depart from the gist of the present invention, and it is needless to say that the above-described configurations may be appropriately combined selectively. No.

[0025]

As described above, according to the vibration damping structure of the present invention, it is possible to exhibit a damper function effective for both bending deformation and shearing deformation. Whichever is superior, and when the building behaves in a complicated manner due to bending deformation and shear deformation, an extremely high vibration damping effect can be exhibited.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a frame structure of a building to which a vibration control frame according to the present invention is applied.

FIG. 2 is an elevational view showing a brace incorporated into a multistory shear wall constituting the skeleton, and a cross-sectional view of the brace.

FIG. 3 is a plan sectional view and an elevation view showing a boundary beam forming the same body.

FIG. 4 is an elevational view showing another example of a brace incorporated in the multi-story earthquake-resistant wall and a cross-sectional view of the brace.

FIG. 5 is an elevation view showing another example of a damper to be incorporated in the multi-story earthquake-resistant wall.

FIG. 6 is a plan sectional view and an elevation view showing another example of the boundary beam.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 frame (vibration damping structure) 3 multi-story shear wall 4 boundary beam 8 viscoelastic brace damper (shear deformation absorbing damper) 14 damper (bending deformation absorbing damper) 20 brace damper (shear deformation absorbing damper) 22 damper (shear deformation absorbing damper) )

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme court ゛ (Reference) F16F 15/02 F16F 15/02 K (72) Inventor Kazuo Tamura 2-3-2 Shibaura, Minato-ku, Tokyo F-term of Shimizu Corporation (reference) 2E002 EB13 FA02 FA04 LA02 LA03 MA12 3J048 AA01 AA04 AC06 BA08 BC09 BG06 DA03 EA38

Claims (1)

[Claims] In a frame provided with two or more multi-story seismic walls continuous in the vertical direction, a plurality of boundary beams are provided in the vertical direction between the multi-story seismic walls arranged at regular intervals. And the boundary beam is provided with a bending deformation absorbing damper that suppresses a vertical relative displacement between the laminated shear walls due to bending deformation of the frame on both sides thereof. Is provided with a shear deformation absorbing damper for suppressing shear deformation of the frame.