极端地震下惯容器-弹簧-阻尼装置对隔震结构减震效果研究

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Abstract This paper considers the use of an inerter-spring-damper (ISD) device to suppress excessive seismic responses of seismic isolated structures subjected to extreme earthquakes.The ISD consists of an inerter, a device that exerts forces proportional to the relative acceleration of its two ends, coupled with a series springs and dampers.The ISD is a device that can utilize amplified apparent mass and tuning effects.Based on the fixed-points theory, we derived closed-form expressions for optimal ISD tuning parameters for harmonically excited single-degree-of-freedom primary systems.The performance of the ISD was compared to the linear viscous damper (LVD) located at the isolation story, a 6 story seismic isolated structure was presented as an example, and the design of ISD optimum parameters was determined by optimum tuning formulae.The performance of the isolated structure containing an ISD and LVD device subjected to extreme earthquakes were investigated.The results show that utilizing the optimum ISD can result in an improvement in the seismic performance in comparison to the LVD.
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Key words： inerter；seismic isolated structure；extreme earthquakes fixed-points theory optimum parameters

Received: 10 September 2018 Published: 15 June 2019

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	Articles by authors
	CHONG Cholap1
	KOHJU Ikago2
	ZHANG Yongshan1

Cite this article:

CHONG Cholap1,KOHJU Ikago2,ZHANG Yongshan1. Effectiveness of an inerter-spring-damper device in the seismic response control of a isolated structure under extreme earthquakes[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(12): 112-117.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I12/112

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