JPH0412217Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a large-capacity seismic damper device that reduces the shaking of high-rise steel buildings during earthquakes.

[Conventional technology]

Conventionally, vibration control dampers have been developed that utilize the viscous resistance of viscous bodies to reduce the vibrations of buildings during earthquakes.

[Problem that the invention attempts to solve]

However, the vibration control effect of the conventional seismic dampers is small, and according to a trial calculation, it has been found that in a large building with more than 30 floors, it will not be effective unless 50 dampers are installed on each floor.

[Means for solving problems]

In view of the above-mentioned conventional situation, the purpose of this invention is to increase the capacity of a seismic damper, and to provide a seismic damper that can increase the seismic control effect even in large, high-rise buildings with a small number of installations. In order to achieve this purpose, the present invention uses a viscous damper with a viscous material interposed between two disks that can be rotated relative to each other using a pin inserted in the center as a fulcrum. A point on the vertical diameter line of the disk on one side of the viscous damper, near the top of the center, is pivoted to a high-rigidity support member fixed to a beam on the upper floor, and the vertical diameter of the disk on the other side of the viscous damper is One point on the line, closest below the center, is pivoted to a high-rigidity support member fixed to the beam on the lower floor, and the upper and lower edges of the viscous damper on the vertical diameter line are fixed to the beams on the upper and lower floors, respectively. It is characterized by being received by each of the anti-slip members.

[Effect]

When an earthquake occurs and a relative horizontal displacement occurs in the beams on the upper and lower floors of the building, this horizontal displacement is transferred to the disks on both sides of the viscous damper through the high-rigidity support members fixed to the beams on the upper and lower floors. Give a relative rotational displacement about the pin as a fulcrum. Therefore, the points of force applied on the disks of both high-rigidity supporting members are located at symmetrical positions close to the pin at the center of both disks in the upper and lower radial directions.
Even if the relative displacement in the horizontal direction between the beams on the upper and lower floors is small, this relative displacement increases significantly as you approach the periphery of the disk, and this displacement is resisted by the viscosity of the viscous material interposed between the two disks. This creates an extremely large damping force and reduces the vibrations of the building.

〔Example〕

The present invention will be explained in detail below based on an illustrated embodiment.

FIG. 1 is a side view of the device of the present invention, and FIG. 2 is a sectional view taken along the line -- in FIG.

In the figure, reference numeral 1 denotes a viscous damper, in which two steel plate disks 1a and 1a' are connected so as to be relatively rotatable about a pin 2 inserted through the center.
A viscous material 3 such as asphalt compound is interposed between a and 1a', and its diameter is set to the maximum size that fits within the internal distance L between the beam 4 on the upper floor and the beam 5 on the lower floor of the building. ing. That is, since the largest conventional viscous damper has a diameter of about 30 cm, the diameter is several times larger than that. This viscous damper 1 is arranged perpendicularly to the beam direction between the beam 4 on the upper floor of the building and the beam 5 on the lower floor. A point on the vertical diameter line of the disk 1a' on the other side, near the bottom of the center, is connected to the high rigidity support member 6' fixed to the beam 5 on the lower floor. It is pivotally connected with bolt 7'. The high-rigidity support members 6, 6' are made of sturdy angle material, etc.
It has much greater rigidity than conventional support members such as bar braces.

In addition, both upper and lower edges of the viscous damper 1 on the vertical diameter line are received with a small gap by the resting members 8 and 8' having a U-shaped cross section and fixed to the beams 4 and 5 of the upper and lower floors, respectively. This prevents the surfaces of the disks 1a and 1a' from wobbling in the vertical direction. Note that 9 and 1 in the figure
0 is the reinforcing rib of the beams 4 and 5.

In the device of the present invention configured as described above,
When an earthquake occurs and a relative horizontal displacement δ occurs in the beams 4 and 5 on the upper and lower floors of a building, this horizontal displacement δ is caused by each high-rigidity support member fixed to the beams 4 and 5 on the upper and lower floors. A relative rotational displacement δ about the pin 2 as a fulcrum is applied to the disks 1a, 1a' on both sides of the viscous damper 1 via the pins 6, 6'. Here, both high rigidity support members 6,
If the force application point on the disks 1a, 1a' of 6', that is, the position of the bolts 7, 7', is a point with a radius Δr from the center of both disks 1a, 1a', then the disk 1 with radius r
The relative rotational displacement δ′ at the periphery of a and 1a′ is δ′=
δ×r/Δr, and since Δr is a short distance from the center of the disks 1a, 1a', δ' has an extremely large value. Therefore, even if the relative horizontal displacement between the beams 4 and 5 on the upper and lower floors is small, the relative rotational displacement between the two disks 1a and 1a' increases significantly as you approach the periphery of the disks 1a and 1a'. The displacement is resisted by the viscosity of the viscous material interposed between both disks 1a and 1a', and an extremely large damping force is exerted.
It is possible to reduce the seismic force of large, high-rise buildings during earthquakes.

The damping effect can be further enhanced by interposing a viscous material 3 between the discs 1a, 1a' and the resting members 8, 8 as shown in FIG.

Figures 4 and 5 show the conventional viscous damper.
This is a graph that compares an example of the estimated seismic response when the seismic control damper device of the present invention, which has 50 times the seismic control force, is installed in an actual large, high-rise building and when there is no damper. Figure 4 shows the maximum response acceleration, and Figure 5 shows the maximum response shear force. As seen in both graphs, when the vibration control damper device of the present invention is installed, both the maximum response acceleration and the maximum response shear force are reduced to approximately 1/2 compared to the case without a damper.

This seismic control power is also effective against the shaking of buildings caused by strong winds.

[Effect of idea]

As explained above, the present invention uses a viscous damper with a viscous material interposed between two disks that can be rotated relative to each other using a pin inserted in the center as a fulcrum. A point on the vertical diameter line of the disk on one side of the viscous damper, near the top of the center, is pivoted to a high-rigidity support member fixed to a beam on the upper floor, and the vertical diameter of the disk on the other side of the viscous damper is One point on the line, closest to the bottom of the center, is pivoted to a high-rigidity support member fixed to a beam on the lower floor, and both upper and lower edges of the viscous damper on the vertical diameter line are fixed to the beams on the upper and lower floors, respectively. It is received by the bulge member, and the horizontal relative displacement between the beams on the upper and lower floors caused by an earthquake is converted into relative rotational displacement and expanded, and this is resisted by the viscosity of the viscous material, resulting in an extremely large damping force. In addition, by making the disk the maximum diameter that fits within the internal spacing between the upper and lower floor beams of a building, which is several times the diameter of a conventional disk, it has a large capacity that can be applied to large, high-rise buildings. Vibration control damper becomes possible.

Note that the damping effect can be further enhanced by interposing a viscous material in the gap between the viscous damper and the resting member.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view, Fig. 2 is a cross-sectional view taken along the line - - in Fig. 1, and Fig. 3 shows an example in which a viscous material is interposed in the gap between a viscous damper and a resting member. Figures 4 and 5, which are cross-sectional views of main parts showing an example, compare trial calculations of seismic response between the case where the device of the present invention is installed in an actual large, high-rise building and the case without a damper. In the graphs shown, Fig. 4 shows the maximum response acceleration, and Fig. 5 shows the maximum response shear force. 1... Viscous damper, 2... Pin, 3... Viscous material, 4... Beam on the upper floor, 5... Beam on the lower floor, 6, 6'
... Highly rigid support member, 8, 8'... Anti-slip member.

Claims (1)

[Claims for Utility Model Registration] (1) A viscous damper with a viscous material interposed between two disks that can be rotated relative to each other using a pin inserted through the center as a fulcrum is installed between the beams on the upper and lower floors of a building. A point on the vertical diameter line of the disk on one side of the viscous damper, close to the top of the center, is pivoted to a high-rigidity support member fixed to a beam on the upper floor, and the disk on the other side of the viscous damper is One point on the vertical diameter line, closest to the bottom of the center, is pivotally connected to a highly rigid support member fixed to the beam on the lower floor, and the upper and lower edges of the viscous damper on the vertical diameter line are attached to the beams on the upper and lower floors. A large-capacity seismic damper device characterized in that each is received by a fixed anti-slip member. (2) The large-capacity damping device according to claim 1, wherein the upper and lower edges of the viscous damper on the vertical diameter line are received by the resting member through a viscous material. damper device.