摘要
利用随机振动理论和动力分析的有限元方法,将场地地震动考虑为均值为零的高斯平稳随机过程,对青藏铁路多年冻土区典型桥墩进行了随机地震反应分析,计算了9度地震作用下桥墩随机地震响应的统计特性,分析了冻土层对桥墩地震反应的影响。研究结果表明,冻土层对桥墩地震反应具有显著影响。
By using the theories of random vibration and the finite element method of dynamical analysis and regarding the earthquake ground motion as a Gauss stationary stochastic process, the stochastic earthquake responses of a typical bridge pier in the permafrost regions of Qingzang railway are analyzed. The maximum and mean values of the responses are calculated, and the effects of the frozen earth thickness on the earthquake responses of the pier are studied. The results obtained from an example are shown that the frozen earth thicknesses produce obvious effect on earthquake responses of the bridge pier.
出处
《世界地震工程》
CSCD
北大核心
2006年第1期79-83,共5页
World Earthquake Engineering
基金
铁道部基金项目(2001G004)
兰州交通大学"青蓝"人才工程基金资助计划资助
关键词
桥梁
桥墩
冻土
地震反应
随机振动
有限元
bridge
bridge pier
seismic response
frozen earth
stochastic vibration
finite element
