接触非线性对土-结构动力相互作用的影响

动力接触非线性是土-结构动力相互作用研究的难点之一。分析土-结构动力相互作用的接触条件和接触状态,构建法向接触单元和切向接触单元模拟土-结构动力相互作用的接触非线性。建立数值模型,分析土-结构在水平加速度波作用下的响应。结果表明,叠加法向接触单元和切向接触单元可以有效模拟土-结构动力相互作用的接触非线性。在水平加速度波作用下,分析土-结构的相互作用而不考虑接触的分析性对基底的竖向应力影响不大,但是会低估基底的水平应力。

Impact of nonlinear contact on dynamic soil-structure interaction

Dynamic nonlinear contact problem is one of the difficulties of dynamic soil-structure interaction.Contact conditions and contact states of dynamic soil-structure interaction were analyzed.Superimposed on normal and tangential contact elements simulated the dynamic nonlinear contact.To establish numerical models analyzed the responses of soil-structure under horizontal acceleration waves.The results show that superimposed on normal and tangential contact elements can effectively simulate the dynamic nonlinear contact.Under horizontal acceleration wave,the analysis of dynamic soil-structure interaction without considering the nonlinear contact has little effect on basal vertical stress,but will underestimate the basal horizontal stress.