Numerical analysis of a shaking table test on dynamic structure-soil-structure interaction under earthquake excitations
Numerical analysis of a shaking table test on dynamic structure-soil-structure interaction under earthquake excitations
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地震作用下动力结构-土-结构相互作用振动台试验数值分析
DOI：
10.1002/tal.1382
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发表时间：
2017
影响因子：
2.4
通讯作者：
Yang Jinping
中科院分区：
文献类型：
--
作者：
Li Peizhen;Liu Shutong;Lu Zheng;Yang Jinping
研究了地震作用下结构-土-结构相互作用现象。本文在振动台试验结果的基础上，提出了一种利用有限元软件进行三维有限元数值模拟的方法。在模拟中，假定土体的性态为等效线性模型，并采用接触单元来考虑地基与周围土体界面的非线性状态。此外，还添加了约束方程来管理不协调的自由度。将有限元分析结果与振动台试验数据进行对比，可以较好地模拟振动台试验的动力响应。最后，对考虑SSSI效应的相邻结构进行了动力响应分析。结果表明，随着激振强度的增大，接触压力、应变幅值和滑移量增大，峰值加速度放大系数减小。这些结果对研究SSSI对结构地震反应的影响具有重要意义。
Structure‐soil‐structure interaction (SSSI) phenomena under earthquake excitations are investigated in this paper. Based on the results of the shaking table test, this work presents a 3‐dimensional finite element numerical simulation method using ANSYS software. In the simulation, an equivalent linear model is assumed for soil behavior, and contact elements are adopted to consider the nonlinearity state of the interface between foundation and surrounding soil. In addition, constrained equations are added to manage the uncoordinated degrees of freedom. By comparing the results of the finite element analysis with data obtained from the shaking table test, the dynamic response of the shaking table test can be simulated properly. Finally, the dynamic response of adjacent structures considering the SSSI effect is analyzed. The results show that with increased excitation, contact pressure, strain amplitude, and pile slip increase, whereas the peak acceleration magnification coefficient decreases. These results are significant for studying the effect of SSSI on seismic responses of structures.