摘要
基于等厚度夹层单元与粘弹性边界条件,建立隧道-围岩体系的动力有限元分析模型,模拟围岩及其衬砌结构之间的力学性态;基于地铁列车振动加速度现场测试成果,选择结构动力有限元计算的时域分析法,对珠三角地区典型土层地铁区间隧道衬砌结构在列车振动荷载作用下的动力响应特性进行分析,获得了不同围岩类别地铁区间隧道的动力响应规律,研究成果对分析地铁隧道动力稳定性具有重要意义。
A dynamic FEM model is established for a system of tunnel and surrounding rockmass based on the interlayer element with equivalent thickness,the conditions of visco elastic boundary and the in-situ vibration results of subway train.The time domain method for the dynamic FEM is chosen to simulate the dynamic response properties of surrounding rockmass and the tunnel lining structure in representative layers of the Pearl River Delta.The dynamic response regulations are obtained for the lining structure of tunnel built in different layers.Those results are very valuable for design and analysis of dynamic stability of the subway's tunnel.
出处
《振动与冲击》
EI
CSCD
北大核心
2008年第1期151-154,共4页
Journal of Vibration and Shock
基金
广东省自然科学基金资助项目(5300512)
佛山大学博士启动基金资助项目
关键词
隧道-围岩体系
等厚度夹层单元
粘弹性边界
动力分析
system of tunnel and surrounding rockmass,interlayer element with equivalent thickness,visco-elastic boundary,dynamic analysis,finite element method(FEM)
