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中文摘要：
基于静、动统一数值分析方法,建立了考虑土与结构接触效应和材料非线性的地下结构地震反应分析模型,并利用通用有限元软件ANSYS对某地铁地下结构地震反应进行数值模拟,探讨了地下结构的非线性地震反应规律,并分析了材料非线性对地下结构地震反应的影响。结果表明：考虑土与地下结构材料的非线性特性后,地下结构在强地震作用下发生了较大的塑性变形,应力、应变最大值位置发生明显变化,应力、应变状态发生明显改变,而对位移、速度、加速度反应的影响不大。
英文摘要：
Based on the static and dynamic combination analysis method,a nonlinear seismic response analysis model for underground structure is established,considering the contact effects between soil and underground structure and the nonlinear property of materials.The seismic response of the underground structure of a subway project is simulated by using the general finite element software ANSYS,and the nonlinear response rule of the underground structure is discussed and the effect of nonlinear property of materials on the seismic response of the underground structure is also analyzed.The results show that the nonlinear properties of soil and structure have significant influence on the seismic response of underground structure,by increasing the seismic response of the nodes severely,changing the positions of the maximum stress and strain,and reversing the stress state of some nodes.However,it has little effect on the node displacement,velocity and acceleration.
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