惯性荷载和地震荷载作用下单桩横向非线性动力响应简化分析

Simplified analysis for lateral nonlinear dynamic response of single pile under inertial and seismic loads

根据已建立的地基土—单桩系统横向非线性动力响应简化分析模型和计算方法,讨论了动力荷载作用下单桩横向非线性惯性响应以及地震作用下单桩横向非线性运动响应,采用两个非线性运动响应因子表征地基土—单桩系统运动响应的非线性特性。计算结果表明:该模型不仅能够模拟在(准)静态单调循环荷载和简谐荷载作用下的单桩横向非线性惯性响应,而且可以反映地震过程中地基土—单桩系统横向非线性运动响应的基本特征。

The lateral nonlinear inertial response and kinematic responses of single pile under dynamic and seismic loads are discussed according to the developed simplified model and computational methods. Two nonlinear kinematic response factors are utilized to represent nonlinear characteristics of the kinematic response in the soil-single pile system. The predicted results show that not only the simplified model and computational methods can simulate the lateral nonlinear inertial response of single pile under the quasi-static monotonic cyclic load and harmonic loads but also reflect the fundamental characters of the lateral nonlinear kinematic response in the soil-single pile system during the seismic motion.