摘要
研究三维轴对称条件下径向非均质土中桩的纵向振动.首先将桩周土体沿径向分为任意圈层来考虑土体的径向非均质性,每个圈层土体均质;然后结合边界条件和相邻圈层土体之间接触面上位移和应力连续条件,对任意圈层土体动力平衡方程由外而内逐层求解,进而利用桩-土完全耦合条件求解桩动力平衡方程,得到桩顶的频域响应解析解和时域响应半解析解;最后通过对土体主要控制参数的研究,得出了土体径向非均匀性对桩-土动力响应的影响.
Based on three-dimensional axisymmetric soil model, the vertical dynamic response of pile in radially inhomogeneous soil layers was investigated with the effect of soil inhomogeneity. First, the soil surrounding the pile was subdivided into arbitrary numerous annular zones, Second, the boundary conditions and continuum assumptions of displacement and stress between adjacent soil zones were developed. Third, the dynamic equilibrium equations of each soil zone are solved from outer to inner surrounding the pile. Third, the dynamic equilibrium equation of pile is also solved and the analytical solutions in frequency domain and semi-analytical solutions in time domain are obtained with the coupled condition of pile-soil interface. The theoretical results reflect the influences of radial soil inhomogeneity on dynamic response of the pile and the soil.
出处
《力学学报》
EI
CSCD
北大核心
2009年第2期243-252,共10页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家自然科学基金资助项目(50879077)~~
关键词
桩-土耦合作用
径向非均质
任意圈层
复刚度
解析解
纵向振动
pile-soil interaction, radially inhomogeneity, arbitrary numerous soil zones, complex stiffness, analytical solution, vertical vibration
