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在对侧向动载作用下桩－土相互作用系统的数值模拟方法进行了评述之后，一个三维显式有限元模型被用来描述桩－土系统，以分析其在施加于桩头的侧向脉冲式动载作用下的非线性动力性能，其中混凝土桩被考虑为线弹性材料，而桩周土体被模拟为一种可进入破坏状态的弹塑性材料，同时滑移界面单元被用来模拟桩、土间的滑移和分离．计算结果表明，桩－土系统的侧向动力性能由桩头的约束条件和地表以下一定深度内的系统上部的性能参数所控制，而桩长对此影响不大．
After reviewing the numerical simulation of the pile-soil interaction under lateral dynamic loading, a three-dimensional explicit finite element model was used to describe the pile-soil system to analyze the effect of the pile-soil interaction on the lateral The nonlinear dynamic behavior under pulsed dynamic loads is considered. The concrete piles are considered as linear elastic materials, while the soil around piles is simulated as a kind of elastic-plastic material which can enter the failure state. Meanwhile, the sliding interface elements are used to simulate Pile, soil slip and separation. The calculation results show that the lateral dynamic performance of pile-soil system is controlled by the constraint of pile head and the performance parameters of the upper part of the system within a certain depth below the ground surface, while the pile length has little effect on this.