水平振动桩周围半无限空间土体受迫振动响应理论解  

Dynamic response of a half-space soil model excited by the known lateral pile vibration

作　　者：吴君涛 王奎华[1,2] 孙梵[1,2] 刘鑫 WU Jun-tao;WANG Kui-hua;SUN Fan;LIU Xin(Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou 310058,China;Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education,Zhejiang University,Hangzhou 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：《振动工程学报》2020年第6期1272-1281,共10页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(51579217,51779217);中国博士后科学基金资助项目(2020M681857);中央高校基本科研业务费专项资金资助项目(2020QNA4027)。

摘　　要：提出了一种基于既有桩基水平振动理论结果反演的桩周土受迫响应模型:即先求解得到动态Winkler模型下桩基水平振动完整解;再由既得桩基水平振动作为动力输入,求解得到半无限空间土模型的动力响应解析解。通过设置不同工况,将解析结果与有限元软件分析结果进行比对,验证了所提模型及解的合理性。该结果可用以评估竖向激振难以施加时桩基水平振动周围土的波动响应规律,并从理论角度说明了采用水平激振旁孔透射波法对桩基完整性进行分析的合理性。In this paper,a solving scheme is proposed for dynamic response of a half-space pile-surrounding soil excited by the known lateral pile vibration.First,the analytical solution to lateral pile vibration is solved by employing dynamic Winkler model.Then the dynamic response of the half-space soil is solved by treating the known pile vibration as the dynamic input.The presented model and its solution are verified by comparing with the finite element analysis(FEA)result subjected to various conditions.The results derived from this paper can be employed to evaluate the dynamic laws of the pile-surrounding soil,when the vertical excitation is hard to be imposed at the pile foundation.The reasonability of employing the lateral parallel seismic(PS)method to predict the pile integrity is demonstrated theoretically as well.

关 键 词：桩基 水平振动 半无限空间 Hankel积分变换 旁孔透射波法 

分 类 号：TU437[建筑科学—岩土工程]