JPH0823182B2 - Vibration control device for buildings - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vibration damping device for buildings, and more particularly to a vibration damping device that can respond appropriately when a small or medium-sized earthquake or wind load occurs.

"Prior art" Conventionally, a damper or the like is used as a means for suppressing shaking of a high-rise building during an earthquake,
That is, there is a method in which a liquid viscous body is used and the viscous resistance of this viscous body absorbs energy during vibration of the building to attenuate the shaking.

However, in such a vibration suppression method, it is mainly supposed to deal with excessive energy during a large earthquake, and the amount of deformation of the building itself is small when a small or medium earthquake or wind load is received, The energy absorption efficiency of the dampers etc. was poor, and the vibration energy of the building was well absorbed, and an effective damping effect was not obtained.

[Problems to be Solved by the Invention] Incidentally, FIG. 6 shows the relationship between the deformation R and the energy absorption amount Q by a general damper. As shown in FIG. 6, at the time of large deformation (region R1) Shows that the energy absorption amount of the damper is high, and the energy absorption amount of the damper is very small at the time of small deformation (region R2). Even with the same deformation amount, the energy absorption efficiency at the time of small deformation is poor.

As described above, since a general damper or the like cannot effectively provide the vibration damping effect at the time of small deformation, it has been desired to develop a vibration damping device capable of appropriately responding to a small or medium earthquake or wind load instead. .

The present invention has been made in view of the above circumstances, and particularly when a small sway occurs in a building during a small-to-medium earthquake or wind load, the vibration energy can be efficiently absorbed, and the vibration damping effect can be effectively obtained. It is an object of the present invention to provide a vibration damping device for a building that can exhibit the above.

[Means for Solving the Problem] The present invention is a vibration damping device that amplifies the vibration of a building and absorbs the vibration energy thereof, and a long operating piece is arranged between the frameworks of the building. Then, the intermediate portion of the operating piece is swingably supported with respect to the shaft set, and both ends of the operating piece, which are free ends, are respectively interposed by damping members with respect to members that cause relative displacement of the shaft set. It is characterized in that they are connected so that they can be displaced relative to each other.

The damping material is preferably composed of a viscous material or a metal damper.

[Operation] In the vibration damping device according to the present invention, when the building shakes due to a small-to-medium earthquake or wind, the operating piece swings in accordance with the shaking of the building. Therefore, the amplitude is amplified at both ends, which are the free ends, and this deformation deforms the damping material interposed between the free end of the operating piece and the shaft, and the deformation of the damping material causes the building to The applied vibration energy is absorbed and the vibration damping effect is exerted. By changing the small vibration into the larger deformation, the energy absorption efficiency of the damping material is improved. As a result, it is possible to absorb the vibration energy of the building with high efficiency and to exert the vibration damping effect even in the case of a small earthquake or a small shake during a wind load.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment of the present invention, and in these drawings, the symbol S indicates the vibration damping device of the present invention.

As shown in FIG. 1, the vibration damping device S basically amplifies a portion surrounded by a pillar 1 and a beam 2 which constitute a framework of a building K along with the shaking of the building. The structure is such that the support 4 as a structure having the swinging operating piece 3 is erected.

In this embodiment, as shown in FIG. 1, both ends of a vertical support body 4 are connected to the upper and lower beams 2 and 2 by pins 6 via connecting portions 5 and 5, respectively, and the center of the support body 4 is connected. The long operating piece 3 extending in the span direction is rigidly joined at the center. Then, both ends of the operating piece 3 are connected to the upper and lower beams 2 with a damping material 7 interposed therebetween. In this case, one end of the operating piece 3 is attached to the lower surface of the upper beam 2 as shown in FIG. The distal end portion of the connecting plate 9 attached via the fixing portion 8 and the damping member 7 interposed therebetween are connected to each other, and
The other end of the operating piece 3 is connected to each other with a damping member 7 interposed between a tip end portion of a connecting plate 9 attached to the upper surface of the lower beam 2 via a fixing portion 8 and a damping member 7 interposed therebetween. In addition, the connecting plate 9 and the fixing portion 8
Are integrally connected to each other by a bolt 10.

As the damping material 7, a viscous body made by mixing rubber and asphalt is used, but as shown in FIG. 3, a fixing plate 11 is attached to one side of the lower end of the connecting plate 9 by a bolt 10. The damping member 7 is interposed between the connecting plate 9 and the fixed plate 11, and the free end of the operating piece 3 is inserted into the damping member 7.
By fastening the bolt 10, the free end of the operating piece 3 and the lower end of the connecting plate 11 are connected to each other.

As shown in FIG. 4, there is an example in which a metal damper is used as the damping material 7. That is, a steel plate that is a metal damper
One end of 12 is connected to the free end of the operating piece 3 by a bolt 10, and the other end of the steel plate 12 is connected to the lower end of the connecting plate 9 by a bolt 10 so that the operating piece 3 and the connecting plates 9 are connected to each other. There is. The steel plate 12 has a plurality of slits 13 formed in the thickness direction thereof to facilitate plastic deformation of the steel plate 12.

Next, the operation of the vibration damping device S thus configured will be described.

When the building K shakes due to a small-to-medium-scale earthquake or wind, relative movement occurs between the upper and lower beams 2.

With such relative movement of the upper and lower beams 2, interlayer deformation occurs in the support 4 pin-connected to them, and the support 4 is inclined by one of the horizontal displacements δ as shown in FIG. At the same time, the long actuating piece 3 rigidly joined to the support 4 in the orthogonal direction also tilts in the same direction by the vertical displacement δ ′. In this case, the relational expression between δ ′ and δ is δ ′ = δ × (L / H). Further, since the relationship between the length dimension L of the operating piece 3 from the center of the support 4 and the height dimension H of the support 4 is L >> H, it can be seen that δ ′ >> δ in the equation. . Note that, in FIG. 5, the length dimension of the operating piece 3 is intentionally shortened for easy understanding, but in an actual construction example, the operating piece 3 naturally has a longer dimension.

Therefore, the excessive interlayer deformation that has occurred in the support body 4 becomes an amplified deformation at the free end of the operating piece 3, and the operating piece 3
Relative movement also occurs between and the connecting plate 9.

Due to such relative movement between the two, a shearing force along the surface direction is applied to the damping material 7 interposed therebetween, and the damping material 7 is deformed by this shearing force and applied to the building K. The generated vibration energy is absorbed.

In the present embodiment, the excessive deformation of the support body 4 is amplified at the free end of the actuating piece 3, and the energy absorption efficiency of the damping material 7 is increased thereby. As a result, an effective vibration damping effect can be obtained.

As the structure of the damping material 7 which is an energy absorbing device, a viscous system (viscous body) and a steel material system (metal damper) are conceivable as described above, but in any form, the shape and size of the building By appropriately selecting the dimensions H and L of the support 4 and the operating piece 3 in consideration of various factors such as the influence of the wind and the assumed earthquake, the amount of deformation with good energy absorption efficiency should be expanded and used. You can

Further, the damping device S according to the present invention can use the damping material 7 as a damper of a seismic isolation structure in addition to exhibiting the original damping effect, and can exert the seismic isolation effect in a small amplitude region. It will be possible. In this case, as shown in FIG. 5, since the damper has a high absorption efficiency, it is more effective than a normal damper.

"Effects of the Invention" As described in detail above, in the vibration damping device for a building according to the present invention, a long working piece is arranged between the shafts of the building, and the middle portion of the working piece is provided with the shaft. Since both ends of the actuating piece, which are free ends, are supported so as to be swingable with respect to the set, and the members that cause relative displacement of the shaft set are connected via a damping member, respectively, so as to be capable of relative displacement. The small vibration generated in a building during a small-to-medium-scale earthquake or wind load is amplified by the actuating piece, and as a result, the vibration energy of the building is efficiently absorbed by the damping material to obtain an effective damping effect. be able to.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a front view of a main part of a building to which a vibration damping device is attached, and FIG. 2 is a main part of an example of a damping material. Of FIG. 3, FIG. 3 is a view taken in the direction of arrows III-III in FIG. 2, FIG. 4 is a front view of a main part showing another example of the damping material, and FIG. 5 is a view showing before and after deformation of the structure, FIG. 6 is a characteristic diagram of a general damper. 1 ... Pillar, 2 ... Beam, 3 ... Operating piece, 4 ... Support (structure), 7 ... Damping material, K ... Building, S ... Damping device.

Claims (3)

[Claims] 1. A vibration damping device for amplifying the vibration of a building and absorbing the vibration energy thereof, wherein a long working piece is arranged between the shafts of the building, and an intermediate portion of the working piece. Is swingably supported with respect to the shaft set, and both ends of the operating piece, which are free ends, are connected to members that cause relative displacement of the shaft set so as to be relatively displaceable through damping members. Vibration control device for buildings. 2. The vibration damping device for a building according to claim 1, wherein the damping material is made of a viscous material. 3. The vibration damping device for a building according to claim 1, wherein the damping material comprises a metal damper.