JP2634635B2 - Building damping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a vibration damping device provided for reducing the shaking of a building during an earthquake or a strong wind, and more particularly, to a vibration damping device for an upper layer of a building. The present invention relates to a vibration damping device for a building in which a pendulum for vibration is installed.

[Conventional technology]

As a vibration damping device for a building as described above, conventionally, a building is supported by suspending a daylight in a free state, and by making the natural period of the pendulum substantially match the natural period of the building, the pendulum functions as a dynamic damper. There is known a structure in which the pendulum energy of a building is absorbed to reduce the shaking (for example, see Japanese Utility Model Publication No. 62-29554).

[Problems to be solved by the invention]

However, in the above-described conventional vibration damping device, after the building starts to vibrate due to, for example, an earthquake or wind, the vibration absorbs the vibration energy of the building, so that the pendulum swings with a sufficient amplitude. It took a long time, and there was a problem in responsiveness until the damping effect was exhibited.

An object of the present invention is to provide a vibration damping device with good responsiveness in view of the above situation.

[Means for Solving the Problems] The characteristic configuration of the vibration damping device for a building according to the present invention is such that the pendulum installed in the upper layer of the building is displaced with respect to the center of the pendulum swing amplitude. The lock means for holding against its own swinging power is provided so as to be freely released.

(Operation)

In other words, since the pendulum is held by the locking means in a posture in which the center of gravity is displaced with respect to the center of the amplitude of the pendulum swinging, the pendulum resists its own swinging power. Can be swung with a large amplitude. Therefore, for example, by unlocking the locking means based on the result of sensing the initial motion of the earthquake, the pendulum can be largely swung from an early stage to efficiently absorb vibration energy.

In addition, since the configuration for that can be implemented simply by holding the pendulum in a predetermined posture by means such as locking, it is possible to avoid complicating the configuration of the vibration damping device.

〔The invention's effect〕

As a result, it has become possible to provide a vibration damping device that can exhibit a vibration damping effect with good responsiveness by absorbing early vibration energy at the time of an earthquake or a strong wind with a simple modification.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 2, on the top floor of the building (B), a vibration damping device for absorbing vibration energy acting on the building (B) during an earthquake or strong wind to reduce the shaking of the building (B). (X) is provided.

As shown in FIG. 1, the vibration damping device (X) is configured to transfer a mass object (1) to a building (B) through six hanging members (2) provided three by one on each side. It is composed of a pendulum (P) suspended and supported swingably from a beam (3) as a main structure. The mass object (1) is, specifically, an ice heat storage tank used for air conditioning of the building (B), and a tank (1A) made of FRP and a support (1B) for the tank.
And one end of the hanging member (2) is pivotally attached to the support (1B), and the other end of the hanging member (2) is attached to the beam (3) by a bracket (4). It is supported by being pivoted to.

The above-mentioned pendulum (P) swings along with the swinging of the building (B) at the time of an earthquake or a strong wind, and the swinging energy absorbs the vibration energy of the building (B). It is configured to reduce the swing of the vehicle. The support table (1
A cycle adjusting device (5) including a spring and a damper for adjusting the cycle of the pendulum (P) is interposed between B) and the building (B).

Further, a lock means (L) is provided for holding the pendulum (P) in a posture in which the center of gravity of the pendulum (P) is displaced with respect to the center of the pendulum swing range against the swinging power of the earthquake. is there. The locking means (L) is provided with a hook member (6) which is detachably engaged with a rod (1a) attached to the support base (1B).
And an actuator (7) for rotating the hook member (6) in a direction of detaching from the rod (1a) to perform a releasing operation.

The actuator (7) is configured to be actuated by a control signal from a control device (8) to release the hook member (6) from the rod (1a). A detection signal from a vibration detection sensor (9) attached to the building (B) is input to the control device (8). Then, based on the detection signal from the vibration detection sensor (9), the control device (8) operates the actuator (7) to release the locking means (L) when the vibration is detected, and releases the pendulum (P). ) Is configured to start swinging.

Thus, the pendulum (P) starts swinging with a large amplitude from the start of the action of an external force due to an earthquake, wind, or the like, efficiently absorbs vibration energy, and can exhibit a vibration damping effect with good responsiveness.

(Another embodiment)

 Hereinafter, another embodiment of the present invention will be described.

<1> In the above-described embodiment, the case where only one pendulum (P) is provided has been described. Alternatively, a plurality of pendulums (P) may be provided. In this case, the pendulum (P) is added to the building (B) by changing the direction of displacement of the pendulum swing amplitude with respect to the center in the position holding state by the locking means (L) for each pendulum (P). The optimal pendulum (P) may be configured to swing according to the direction of the external force.

<2> The specific configuration of the lock means (L) for the pendulum (P) can be changed as appropriate. For example, although not shown, a pin that is driven to move horizontally is inserted into a hole formed in the support base (1B). A fitting configuration may be used.

<3> As the suspender (2) constituting the pendulum (P),
In addition to steel materials such as angle steel and channel steel, wires and the like can also be used. Further, a length adjusting mechanism such as a turn buckle may be interposed in the hanging tool (2) to enable fine adjustment of the cycle.

<4> In the above embodiment, the mass object (1) constituting the pendulum (P) is described as one that also serves as an ice heat storage tank for air conditioning. However, other heavy equipment such as an elevated water tank is used instead. May also be used, and an independent dedicated weight may be provided as the mass object (1).

<5> In the above embodiment, the case where the period adjusting device (5) including the spring for adjusting the period and the damper is provided between the mass object (1) and the building (B) has been described. In carrying out the above, the cycle adjusting device (5) may be omitted.

<6> The specific configuration of the attachment of the hanging member (2) constituting the pendulum (P) to the mass object (1) side and the building (B) side can be appropriately changed. For example, the fulcrum (2b) for attachment to the building (B) side may be configured as a universal joint such as a universal joint or a ball joint to allow the mass object (1) to swing in all directions.

<7> The configuration for releasing the locking means (L) can be changed as appropriate, and the results of vibration detection from a vibration detection sensor such as a seismometer installed at a remote location and the location of the seismometer that is known in advance are known. Based on the distance information between the building and the building (B),
The locking means (L) may be released at the timing when the seismic wave is predicted to reach the building (B).

<8> In the above embodiment, the vibration damping device (X) is provided on the top floor of the building (B), but may be provided on an upper floor other than the top floor instead. Alternatively, it may be provided on a rooftop.

<9> In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the structure shown in the attached drawings.

[Brief description of the drawings]

The drawings show an embodiment of a vibration damping device for a building according to the present invention. FIG. 1 is a sectional view of a main part, and FIG. 2 is a partially cutaway front view of the building. (P) ... pendulum, (B) ... building, (L) ... locking means.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hidetoshi Ishikura 4-27 Honcho, Higashi-ku, Osaka, Osaka Prefecture Inside Takenaka Corporation Osaka Main Store (72) Inventor Yoshinori Inoue 4-27, Honcho, Higashi-ku, Osaka-shi, Osaka Takenaka Corporation Osaka Main Store (72) Inventor Shuji Matsuura 4-27 Honcho, Higashi-ku, Osaka City, Osaka Prefecture Inside Takenaka Corporation, Osaka Main Store (72) Inventor Kiyoshi Murakami 4-chome Honmachi, Higashi-ku, Osaka City, Osaka 27th Takenaka Corporation Osaka Main Store

Claims (1)

(57) [Claims] A pendulum (P) for damping vibration is provided on an upper layer of a building (B).
A lock for holding the pendulum (P) against its own swinging power in a posture in which the center of gravity of the pendulum (P) is displaced with respect to the center of the swinging amplitude of the pendulum. A vibration damping device for a building, wherein the means (L) is provided so as to be freely released.