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土层条件对结构在地震作用下的破坏有很大影响。本文旨在对考虑桩-土-结构动力相互作用(PSSI)对大跨度斜拉桥地震响应造成的影响进行评估。文中将桩-土相互作用理想化为采用连续分布的水平弹簧和粘滞阻尼器的Penzien模型,并用ANSYS有限元分析软件对苏通大桥整体模型进行地震响应时程分析来研究PSSI的影响。可以看出,PSSI对苏通大桥地震响应有显著影响,如果忽略PSSI效应,大部分响应将被低估。
Soil conditions have a great influence on the destruction of the structure under the earthquake. The purpose of this paper is to evaluate the effect of PSSI on the seismic response of long-span cable-stayed bridges. In this paper, the pile-soil interaction is idealized as a Penzien model using continuous horizontal springs and viscous dampers. ANSYS finite element analysis software is used to study the influence of PSSI on the seismic response of the Sutong Bridge. It can be seen that PSSI has a significant impact on the seismic response of Sutong Bridge. Most of the responses will be underestimated if the PSSI effect is ignored.