桩基础桥梁的土-结构动力相互作用

Seismic response for pile-foundation bridges considering soil structure dynamic interaction

首先以加权残差公式为基础 ,采用积分方程方法推导与桩基础对应的层状场地动力刚度矩阵公式 ,并用解析解验证了数值分析的计算结果 ;然后用子结构法联合积分方程方法和有限元法的计算结果 ,求解土 -结构动力相互作用的地震响应 ;最后以芜湖长江大桥主跨斜拉桥长塔墩的地震响应为例 ,将本文的计算结果与 Penzien模型的计算结果作了比较。

Based on the weighted residual formulation, the integral expression and the formula for calculating the dynamic stiffness matrix of pile group foundation by the indirect boundary element method are derived. The formula of response [ N p(z) ] in a element with fixed boundary was derived by the Mathmatica. The dynamic stiffness matrix was calculated by MATLAB program. The results which were validated by analytic solution can directly used to solve the soil pile structure interaction problem by the substructure method which connecting the finite element method and the boundary element method.