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Semiactive piezoelectric friction damper

A friction damper, semi-active technology, applied in the direction of spring/shock absorber, vibration suppression adjustment, building components, etc., can solve the problem of unable to adjust the sliding friction force, etc., to achieve the effect of ensuring stability and ensuring the safety of people's lives and property

Inactive Publication Date: 2005-03-16
DALIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a semi-active piezoelectric friction damper with self-adaptive ability to solve the technical deficiency that the existing passive friction damper cannot adjust the sliding friction force in real time according to the response of the structure and the intensity of the earthquake

Method used

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Embodiment Construction

[0017] The implementation steps of the present invention will be described in detail below in conjunction with the technical scheme and accompanying drawings.

[0018] During the implementation, firstly, the engineering structure is analyzed under the action of small and large earthquakes, and according to the adopted control algorithm, the minimum sliding friction force and the maximum sliding friction force to be provided by the semi-active piezoelectric friction damper are respectively determined, and the design Dimensions and parameters of the semi-active piezoelectric friction damper; secondly, process the required upper steel plate 5, lower steel plate 9, sliding plate 7 and friction plate 6, and design or purchase the piezoelectric ceramic driver 3 and force sensor 8 that meet the design requirements ; Again, the positive pressure corresponding to the minimum sliding friction force is used as the pre-tightening force, which is applied to the piezoelectric ceramic driver ...

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Abstract

The invention relates to a semiactive piezoelectric friction damper comprising tube type piezoelectric ceramic driver, tube force sensor, upper steel plate, a lower steel plate, a sliding steel plate, a fiction piece (brass or brake pad). The character is that bolt hole is opened on the upper steel palate and lower steel plate, also screw and sliding groove are opened on the fiction piece and the sliding steel plate. A pre-tension bolt connects the upper steel plate, a lower steel plate, a sliding steel plate to the fiction piece with inner hole of the piezoelectric ceramic driver and inner hole of the force sensor. The semiactive piezoelectric friction damper has convenient process, stable capacity, low energy consumption, also can change force of sliding friction by adjusting the voltage applied on the piezoelectric ceramic driver according to the signal of quake of ground and respond to the project structure. The invention can connect to multi-layer building via V type support or slant support, which has certain economic and using value, also can be widely used to dissipation of energy and shock absorption field of civil engineering structure.

Description

technical field [0001] The invention belongs to the anti-seismic technical field of civil engineering structures, and relates to the structure of a semi-active piezoelectric friction damper. Background technique [0002] Earthquakes and strong winds pose a serious threat to the safety and comfort of civil engineering structures. How to effectively reduce the response of engineering structures under dynamic loads such as earthquakes and winds, and improve the structures' anti-seismic, wind-resistant and disaster-resistant performances is one of the urgent problems to be solved in civil engineering. The traditional anti-seismic strategy is to passively rely on the stiffness and strength of the structure itself to resist the effects of earthquakes and wind vibrations. Under the action of strong earthquakes, it will inevitably lead to damage or destruction of some components of the structure, which is neither economical nor expected. effect, and modern structural vibration cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/98F16F15/139
Inventor 李宏男李军宋钢兵
Owner DALIAN UNIV OF TECH
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