瑞利波作用下成层地基中单桩横向振动分析

采用文克勒地基梁模型建立了成层地基中桩土相互作用的粘弹性模型，并利用现有的成层地基中的瑞利波弥散曲线解析解，通过解析法建立了瑞利波作用下多层介质中的桩体横向位移计算公式。在此基础上通过计算实例分析发现，无量纲频率α0、桩土相对刚度比Ep/Es、桩顶约束条件是影响桩体横向位移变化规律的主要因素，随着无量纲频率、桩土相对刚度比的增大，桩土分离的现象逐渐变得显著，桩顶约束的出现也会引起相同的结果。

Lateral Dynamic Response of Single Pile in Multiple Layers Soil during the Passage of Rayleigh Waves

The layered soils are modelled as a Winkler foundation interacting with the pile through continuously distributed linear springs and dashpots. With the analytical solution of free field horizontal displacement in multiple layers of soil during the passage of a unit-amplitude Rayleigh wave, the horizontal displacement equation of a pile is derived in the paper. With the equation , a practical example is calculated. It is found through the results that dimensionless frequency a 0 , the ratio of E p to E s and the boundary condition on the top of the pile affect the horizontal response of the pile extraordinarily. With the increase of a 0 and E p/E s or the emergence of top constraint, the pile and the soils detach remarkably.