弹性支承桩周围土振动响应解析解及其波动规律研究  

An analytical solution of dynamic response of soil around elastic bearing pile

作　　者：吴君涛 王奎华[1,2] 肖偲 刘鑫[1,2] WU Juntao;WANG Kuihua;XIAO Si;LIU Xin(Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou,Zhejiang 310058,China;Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education,Zhejiang University,Hangzhou,Zhejiang 310058,China)

机构地区：[1]浙江大学滨海和城市岩土工程研究中心,浙江杭州310058 [2]浙江大学软弱土与环境土工教育部重点实验室,浙江杭州310058

出　　处：《岩石力学与工程学报》2018年第10期2384-2393,共10页Chinese Journal of Rock Mechanics and Engineering

摘　　要：通过建立弹性支承桩–土耦合模型,考虑桩周土三维轴对称振动,求解得到桩周土振动响应频域解析解。通过傅里叶逆变换得到桩周土振动响应在时域内的半解析表达,并借助有限元分析软件对比验证本文解的合理性。在此基础上,对不同工况条件下的桩–土耦合系统参数进行研究,得到桩周土波动响应的规律,为实际工程测试提供理论支持与指导作用。This study proposed an elastic bearing pile-soil coupled model and obtained an analytical solution of soil around pile in frequency domain considering three-dimensional symmetric vibration of soil around piles. The semi-analytical solution of surrounding soil in time domain can be solved with inverse Fourier transform,and the validity can be proved by compared with the result solved by FEM software. On this basis,parameters of pile-soil coupled system can be analyzed during variable conditions,and laws of dynamic response of surrounding soil can be concluded as well,which can be used to provide practical guidance for engineering application.

关 键 词：桩基础 低应变 动力测试 积分变换 有限元法 

分 类 号：TU473[建筑科学—结构工程]