层状地基中群桩水平振动

Lateral vibration of pile groups in layered soil

在考虑地基土分层的基础上,采用动力 Winkler 地基模型模拟桩土相互作用并运用传递矩阵,求解层状地基中的单桩和群桩的阻抗函数。在计算动力相互作用因子时考虑了被动桩与土的相互作用。最后将相互作用因子和群桩阻抗的本文解与精确解进行对比,验证了本文方法的有效性。

A simple analytical solution is outlined for computing the lateral dynamic impedance of single floating piles and floating pile groups in layered soil media. A dynamic Winkler model utilizing the finite-element based spring and dashpots is adopted for simulating the effect of pile-soil interaction, combining with a transfer-matrix formulation in the case of multi-layered soils. Attention is then given to the lateral dynamic stiffness and damping of group piles. Pile-soil-pile interaction is considered by assuming interaction between the receiving pile and the surrounding soil. It is demonstrated that the prediction of simplified method is in good agreement with rigorous numerical solutions.