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桩基础对邻近场地作用冲击荷载的响应本质上是桩-土组成的体系在冲击荷载下的整体动力相互作用问题。为了研究该问题,采用有限元法模拟冲击荷载引起桩基础的振动。利用通用有限元分析软件ABAQUS建立了有限元-无限元(FE-IFE)耦合分析模型,分析了冲击荷载作用时桩基础动力响应的规律,并对影响桩基础响应的因素进行了探讨。计算结果表明,桩的振动程度取决于冲击荷载作用间距和冲击荷载能量,而冲击荷载作用间距越远,桩的振动波长越长。
The response of the pile foundation to the impact load of the adjacent site is essentially the overall dynamic interaction problem of the pile-soil system under impact load. In order to study this problem, the finite element method was used to simulate the impact of pile foundation caused by pile vibration. The finite element analysis (FE-IFE) coupled analysis model was established by using the general finite element analysis software ABAQUS. The dynamic response of the pile foundation during the impact load was analyzed. The factors affecting the response of the pile foundation were also discussed. The calculation results show that the pile vibration depends on the impact load spacing and the impact load energy, and the farther the impact load, the longer the vibration frequency of the pile.