1554. Influence of friction variability on isolation performance of a rolling‑damper isolation system

Biao Wei1, Tianhan Yang2, Lizhong Jiang3

School of Civil Engineering, Central South University, Changsha, 410075, China

National Engineering Laboratory for High Speed Railway Construction, Changsha, 410004, China

1Corresponding author

E-mail: 1weibiao@csu.edu.cn, 2weibiaosss521@163.com, 3lzhjiang@csu.edu.cn

(Received 14 July 2014; received in revised form 2 September 2014; accepted 20 September 2014)

Abstract. Previously, many isolation systems with friction action are designed ignoring the variability of friction coefficient. By taking a rolling-damper isolation system as the study object, this paper analyzed the effects of non-uniform distribution of rolling friction coefficient on its isolation performance through a compiled computer program. The results show that the errors associated with the maximum structural relative displacement, acceleration and residual displacement due to ignoring the friction variability are sequentially growing, and this rule is weakened by the damper. Under the condition of large friction variability and little damper action, the calculation of the maximum structural relative displacement and acceleration should consider the friction variability. When the structural residual displacement is concerned, the variability of rolling friction coefficient should be fully considered regardless of friction variability degree.

Keywords: structure, isolation, rolling friction, damper, variability, seismic performance.

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Cite this article

Wei Biao, Yang Tianhan, Jiang Lizhong Influence of friction variability on isolation performance of a rolling‑damper isolation system. Journal of Vibroengineering, Vol. 17, Issue 2, 2015, p. 792‑801.

 

JVE International Ltd. Journal of Vibroengineering. Mar 2015, Volume 17, Issue 2. ISSN 1392-8716