JP3028035B2 - Active vibration control structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damping structure having an active damping device for reducing the response of a structure caused by disturbances such as earthquakes and winds by the control force of a driving device, and more particularly to a driving damping structure. It is devised about the supply of driving energy to the device.

[0002]

2. Description of the Related Art As an active vibration damping device, for example, an additional mass installed at the top of a building or the like is driven by a driving device in response to a disturbance such as an earthquake or wind, and a counterforce is applied to the building to apply a counterforce to the building. A variable damping device of a type that reduces the response (for example, see Japanese Patent Publication No. Hei 3-70075, Japanese Patent Publication No. Hei 5-4515, etc.), and a hydraulic cylinder type damping device interposed between a beam-column frame of a building and a brace The damping coefficient is adjusted by the valve control etc. of the
One that reduces the response (for example, Japanese Patent Application Laid-Open No. 2-209)
No. 567, Japanese Unexamined Patent Publication No. 2-209571, etc.), a type in which a control force is applied to a base of a building having a seismic isolation structure by a drive device (for example, "Seismic isolation / vibration / vibration control of structures" Juichi et al., Gihodo Shuppan Co., Ltd., published in 1988, p. 217).

[0003]

In order to obtain a large vibration damping effect by the active vibration damping device as described above, the most reliable method is to forcibly suppress the shaking with a large actuator.

[0004] However, as disturbances such as earthquakes and winds increase, the required control force also increases, and how to supply necessary energy becomes a problem.

According to the present invention, the energy required for vibration damping can be efficiently supplied by providing a device for converting and storing vibration energy due to an earthquake or wind in a vibration damping structure having an active vibration damping device. It is intended to be.

[0006]

SUMMARY OF THE INVENTION The present invention relates to an active vibration control structure in which the response of a structure caused by an external force (disturbance) such as an earthquake or wind is reduced by the control force of a driving device installed on the structure. A conversion device for converting vibration energy of a vibrating body vibrating by an external vibration force into driving energy, and using the driving energy converted or stored by the conversion device to drive the vibration damping device. This is to drive the device.

The vibrating body may be the structure itself,
It may be a facility attached to the structure, or a structure or object having a predetermined mass separately provided inside or outside the structure.

[0008] In the case of the structure itself, for example, in the case of a superstructure in a structure having a seismic isolation layer provided with a laminated rubber bearing, a sliding bearing, or the like, in the case of a partial layer of the building such as a building upper layer, vibration control, There may be a case where two or more buildings are arranged side by side with a device interposed.

[0009] Further, when the equipment attached to the structure is used as a vibrating body, a water receiving tank, a cooling tower, an outdoor unit, an O / O, which can be relatively moved with respect to the structure in the form of floor seismic isolation or the like.
A equipment, an outdoor aquarium, etc. are conceivable.

In addition, the vibrator is provided only for the purpose of generating vibration energy , and its mass is used.
It is also conceivable.

As the driving device, there are a conventional hydraulic cylinder type actuator (including a variable damping device and the like) and an electric type driving device such as a rack and pinion type. There is no particular limitation on the format.

As the converter, a combination of a hydraulic cylinder and an accumulator can be used as a converter for a hydraulic cylinder type actuator. In this case, the hydraulic cylinder portion is connected to a vibrating body, and the force from the vibrating body is used. The piston of the hydraulic cylinder is moved to store energy in the form of hydraulic pressure in the accumulator, and the stored energy is controlled based on control commands (feedforward type, feedback type, combination of both, etc.). , The response of the structure can be suppressed without separately supplying external energy (external energy may be used together).

Further, those for electric actuators, generators for converting the vibration into electric energy, etc., can be used.

In the present invention, the installation position and type of the vibration damping device in the structure are not particularly limited. For example, as in the case of the conventional vibration damping device, the additional mass is driven by the driving device. Drives interposed between beam-to-column frames and braces in beam-to-column frames, or between large beams and columns of building cores and superstructures, and other structural elements such as outer frames and outer walls , A device interposed between building ridges, or a device with a drive device installed at the base of a seismic isolation structure (active seismic isolation).

[0015]

FIG. 1 conceptually shows a vibration control structure 1 according to the present invention, in which a vibrating body 2 vibrates due to an external vibration (disturbance) such as an earthquake or wind, and the vibration energy is transmitted to a converter 3. It is supplied and converted into driving energy.

The structure 1 is provided with a drive device 4 of some type, and the drive device 4 is controlled based on a disturbance detected such as an earthquake or a wind or a response of the structure 1 to provide a structure. The response of the object 1 is reduced.

In the present invention, the driving energy of the driving device 4 at this time is supplied from the conversion device 3. If the disturbance of the earthquake or the wind is large, the driving energy is converted and accumulated by the conversion device 3. (Within the capacity of the conversion device 3), the energy required for vibration damping can be supplied more efficiently than in the case of relying on external energy.

[0018]

FIG. 2 shows an example of a vibration control system using vibration energy due to an earthquake as an embodiment of the present invention.

The vibration damping device according to the present embodiment is driven by a hydraulic cylinder type driving device 4a provided at the top of the main body of the structure 1 and supporting the additional mass 5 slidably supported in the horizontal direction with respect to the main body of the structure 1. It is a method of doing.

The main body of the structure 1 is supported on the foundation 6 via a laminated rubber 7 and constitutes a conversion device in a direction in which a horizontal force acts between the base 6 and the main body of the structure 1. An accumulator 3b is provided in the hydraulic circuit of the hydraulic cylinder 3a with the hydraulic cylinder 3a interposed.

The laminated rubber 7 forms a seismic isolation layer between the foundation 6 and the main body of the structure 1 as a long-period support, and the relative displacement of the base 6 and the main body of the structure 1 during an earthquake. As a result, the hydraulic cylinder 3a receives horizontal force, and energy is accumulated in the accumulator 3b in the form of an increase in hydraulic pressure.

The response of the main body of the structure 1 is detected by a sensor, and the driving device 4a is driven based on the response.
The response of the body is reduced.

The driving device 4a is connected to the accumulator 3b constituting the above-mentioned converter by a hydraulic circuit, and the driving energy is supplied from the accumulator 3b.

As described above, in the present embodiment, the main body of the structure 1 is regarded as a vibrating body that generates vibration energy, and the driving energy is supplied to the driving device 4a from the conversion device including the hydraulic cylinder 3a and the accumulator 3b. The system that controls the vibration of the structure is configured.

[0025]

[0026]

[0027]

[0028]

[0029]

[0030]

In the vibration control structure of the present invention, the vibration of the structure is suppressed by utilizing the energy of the disturbance.
The drive energy that can be supplied increases according to the magnitude of the disturbance, and a large vibration control effect can be obtained with energy saving.

[Brief description of the drawings]

FIG. 1 is an elevational view conceptually showing a vibration control structure of the present invention.

FIG. 2 is an elevational view schematically showing one embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vibration control structure , 2 ... Vibration body , 3 ... Conversion device, 3a ... Hydraulic cylinder, 3b ... Accumulator , 4, 4a ... Drive device, 5 ... Additional mass, 6 ... Base part, 7 ... Laminated rubber

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04H 9/02

Claims (4)

(57) [Claims] 1. An active vibration damping structure in which the response of a structure due to an external vibration force is reduced by the control force of a driving device installed on the structure, wherein the vibration energy of a vibrating body vibrating by the external vibration force is converted by a conversion device. An active vibration control structure characterized in that it is converted into driving energy and the driving device is driven by the driving energy. 2. The active vibration control structure according to claim 1, wherein the vibration body is a structure itself constituting the vibration control structure. 3. The active vibration control structure according to claim 1, wherein the vibrating body is an object or a structure having a predetermined mass installed inside or outside the structure. 4. The active vibration damping structure according to claim 1, wherein the converting device comprises a hydraulic cylinder connected to the vibrating body and receiving a force from the vibrating body, and an accumulator provided in the hydraulic cylinder.