（1 河北工业大学土木工程学院， 天津 300401； 2 河北省土木工程技术研究中心， 天津 300401；3 河北工业大学城市学院土木工程系， 天津 300130）

［摘要］强震作用下的桩基础动力响应特性一直是岩土工程抗震领域研究的热点问题。基于液化土中桩基振动台试验和Biot固结理论中的up形式公式，采用有限元软件OpenSees PL 建立三维有限元模型，并进行数值模拟分析，将数值模拟结果与试验结果进行对比。结果表明：在正弦波输入下，干砂试验单桩台面、承台加速度和位移时程与模拟台面、承台加速度和位移时程从形式和数值大小上均相差不大；液化砂土试验单桩承台加速度幅值和位移与模拟承台加速度幅值和位移略有差别，但试验台面加速度和位移幅值与模拟台面加速度和位移幅值比较接近。El Centro地震波输入下也可以得到相近结论。

［关键词］OpenSees PL； 振动台试验； 液化土； 三维有限元模型； 数值模拟分析

中图分类号：TU473      文献标识码：A      文章编号：1002-848X(2015)08-0085-06

Numerical simulation study on lateral dynamic response of pile foundation

in liquefied soil based on OpenSees PL

Li Yurun1,2， Sun Weimin1， Liang Yan3

 (1 College of Civil Engineering, Hebei University of Technology, Tianjin 300401, China;

2 Civil Engineering Technology Research Center of Hebei Province, Tianjin 300401, China;

3 Department of Civil Engineering, Hebei University of Technology City College, Tianjin 300130, China)

Abstract:Characteristic of dynamic response of pile foundation under strong earthquake is a hot issue of geotechnical earthquake engineering field. Based on the shaking table test of pile foundation in liquefied soil and up  formula in Biot consolidation theory, finite element software OpenSees PL was used to establish 3D finite element model to carry out numerical simulation analysis. The results of numerical simulation and experiment  were compared. The results show that for test and simulation of dry sand, acceleration and displacement timehistory curves of cushion cap and cap surface of single pile are similar in form and magnitude with sine wave input. For test and simulation of liquefied sand, acceleration and displacement of cushion cap of single pile have little difference in amplitude, but acceleration and displacement of cap surface of single pile are similar in amplitude. The similar conclusions can be concluded under the input of El Centro seismic wave.

Keywords:OpenSees PL; shaking table test; liquefied soil; 3D finite element model; numerical simulation analysis

*国家自然科学基金资助项目（51008110），河北省自然科学基金资助项目（E2013202118），中国博士后科学基金资助项目（2014M561169），河北省住房和城乡建设厅项目（2014231）。

作者简介：李雨润，博士，副教授，Email:iemlyr7888@163.com。

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