Mathematical model and results for seismic responses of a nonlinear isolation system

被引：0
作者：
Li S. [1 ,2 ]
Xiang P. [1 ,2 ]
Wei B. [1 ,2 ]
Tan H. [1 ,2 ]
Fu Y. [1 ,2 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
[2] National Engineering Laboratory for High Speed Railway Construction, Changsha
来源：
Earthquake and Structures | 2021年 / 21卷 / 03期
基金：
中国国家自然科学基金;
关键词：
coulomb friction; mathematical model; seismic isolation; spring; viscous damper;
D O I：
10.12989/eas.2021.21.3.291
中图分类号：
学科分类号：
摘要：
The friction and viscous damping actions always cause nonlinear responses of a seismic isolation system under earthquakes. Their influence on the seismic responses needs investigation in detail. In order to analyze the effects of nonlinear phenomenon on the seismic isolation system, a mathematical model was built for such a nonlinear isolation system, and the nonlinear responses were calculated and analyzed. The numerical results indicate that an appropriate combination of spring, Coulomb friction and viscous damper is able to achieve an optimal seismic performance. The stiffness and natural period of system are significantly influenced by the friction action. Both the friction action and the viscous damping action can dissipate earthquake energy, and the optimal value of one depends on the value of the other in the seismic isolation system. All of the values of spring, Coulomb friction and viscous damper should be accurately evaluated before the design of seismic isolation system. © 2021 Techno-Press, Ltd.
引用
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页码：291 / 301
页数：10
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