饱和土中端承桩水平振动动力响应分析  

Dynamical characteristics of an end bearing pile embedded in saturated soil under horizontal vibration

作　　者：余俊[1] 尚守平[2] 李忠[1] 任慧[2] 曾育林[2] 

机构地区：[1]同济大学地下建筑与工程系,上海200093 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《岩土工程学报》2009年第3期408-415,共8页Chinese Journal of Geotechnical Engineering

基　　金：中国博士后科学基金项目(20080440652);湖南省科技计划重点项目(06sk4057);博士点基金新教师基金项目(20070532090)

摘　　要：基于Biot动力固结方程,研究了端承桩在饱和土中水平振动问题。引入势函数对方程解耦,采用算子分解及分离变量法结合桩土耦合条件得到简谐稳态水平振动下桩土动力响应的解析解。将本文解与等效单相解进行了对比,并阐明两解之间的关系。通过参数分析,表明渗透系数对桩土水平动力阻抗有一定影响,指出可等效成等效单相解的条件。Based on Blot＇s consolidation equation, the horizontal vibration of an end bearing pile embedded in saturated soil is investigated. The potential functions are introduced to decouple the governing differential equations, then by virtue of the differential operator splitting and variable separation method, the horizontal dynamical characteristics under steady state of pile-soil interaction are obtained with the assumption of perfect contact between the pile and the soil. The comparisons with the equivalent single-phase solution and the tow-phase solution are presented. A parametric study is conducted to determine the main features of pile-soil interaction in horizontal vibration. As a result, the permeability coefficient has certain effects on the impedance of rocking, horizontal and coupled horizontal-rocking vibrations of the single pile, and the condition of the solution that can be equivalent to the equivalent single-phase solution is put forward.

关 键 词：饱和土 水平振动 等效单相解 阻抗 

分 类 号：TU435[建筑科学—岩土工程]