摘要
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 a0 、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。
The layered soils are modelled as a Winkler foundation interacting with the pile through continously 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 a0, the ratio of Ep to Es and the boundary condition on the top of the pile affect the horizontal response of the pile extraordinarily. With the increase of a0 and Ep/Es or the emergence of top constraint, the pile and the soils detach remarkably.
出处
《振动工程学报》
EI
CSCD
北大核心
2001年第2期205-210,共6页
Journal of Vibration Engineering
关键词
桩
瑞利波
成层地基
横向位移
单桩
pile
Rayleigh wave
layered soils
horizontal displacement
