Effects of friction variability on isolation performance of rolling-spring systems  

作　　者：魏标 王鹏 杨添涵 戴公连 蒋丽忠 文颖 

机构地区：[1]School of Civil Engineering, Central South University, Changsha 410075, China [2]National Engineering Laboratory for High Speed Railway Construction, Changsha 410004, China

出　　处：《Journal of Central South University》2016年第1期233-239,共7页中南大学学报（英文版）

基　　金：Projects(51308549,51378504,51478475) supported by the National Natural Science Foundation of China;Project(2015JJ3159) supported by the Natural Science Foundation of Hunan Province,China;Project(2015CX006) supported by the Innovation-driven Plan in Central South University,China

摘　　要：By taking a rolling-spring isolation system as the study object, the effects of the non-uniform distribution of rolling friction coefficient on its isolation performance were analyzed by a compiled computer program. The results show that the errors associated with the structural maximum relative displacement, acceleration and residual displacement due to ignoring the friction variability sequentially grow. This rule is weakened by the spring action, however, the unreasonable spring constant will cause sympathetic vibration. Under the condition of large friction variability, in the calculation of the structural maximum relative displacement and acceleration, the friction variability should be considered. When the structural residual displacement is concerned, the variability of rolling friction coefficient should be fully considered regardless of the friction variability.By taking a rolling-spring isolation system as the study object, the effects of the non-uniform distribution of rolling friction coefficient on its isolation performance were analyzed by a compiled computer program. The results show that the errors associated with the structural maximum relative displacement, acceleration and residual displacement due to ignoring the friction variability sequentially grow. This rule is weakened by the spring action, however, the unreasonable spring constant will cause sympathetic vibration. Under the condition of large friction variability, in the calculation of the structural maximum relative displacement and acceleration, the friction variability should be considered. When the structural residual displacement is concerned, the variability of rolling friction coefficient should be fully considered regardless of the friction variability.

关 键 词：rolling-spring structure seismic isolation rolling friction seismic performance 

分 类 号：TG333[金属学及工艺—金属压力加工]