【摘要】 研究了在水平简谐荷载作用下饱和土中群桩的动力反应问题。半空间饱和土采用Biot提出的三维波动原理,将桩看作是一维的弹性杆单元,采用Hankel变换及数值逆变换得到饱和土的基本解。利用桩土之间的变形协调条件和叠加原理得到饱和土中群桩的第2类Fredholm积分方程,采用动力相互作用因子的方法计算群桩在水平荷载作用下的动力阻抗,给出了群桩的阻抗、弯矩以及孔压的数值结果。该方法可用于计算层状饱和土中群桩的水平动力反应问题。更多还原

【Abstract】 The dynamic responses of pile groups in saturated soil subjected to horizontal harmonic load are researched. By adopting Biot′s three-dimensional wave theory for the half space saturated soil and the pile being simplified as one-dimensional elastic bar,the fundamental solutions are obtained by Hankel integral transform and numerical inverse transform. The second kind of Fredholm′s integral equation of pile groups in saturated soil can be obtained by using compatibility condition between piles and soil and the superposition method. The dynamic impedances of pile groups in saturated soil subjected to horizontal loads are determined by using dynamic interaction factors,and the horizontal impedances,moments and pore pressures are presented. The method can be used to calculate horizontal dynamic response of pile groups in multilayered saturated soil.更多还原