Abstract Simulation of semi-infinite foundation is a key issue in the finite element analysis of dynamic soil-structure interactions. When the viscous-spring artificial boundary is used to simulate the radiation damping effect, the boundary condition types of the truncated foundation are different in the static and dynamic steps. It is needed to switch the displacement boundary to the traction boundary in the integral static-dynamic analysis. This paper proposes a scheme for steadily switching boundary condition types in the integral static-dynamic analysis of structures in Abaqus by means of the element birth and death technique. To verify the proposed scheme, a two-dimensional FE analysis of Pine Flat dam due to static and dynamic loads is carried out for wave motion problems of both internal and external sources. Results show that the proposed scheme can switch the boundary conditions steadily and improve the computational accuracy.

中文翻译：

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Abaqus中土结构整体静动力分析中边界条件类型切换方案

摘要 半无限地基模拟是动态土-结构相互作用有限元分析中的一个关键问题。使用粘弹性人工边界模拟辐射阻尼效应时，截断地基的静态和动态步骤边界条件类型不同。在整体静动力分析中需要将位移边界切换到牵引边界。本文提出了一种在Abaqus结构静动力综合分析中利用单元生死法稳定切换边界条件类型的方案。为了验证所提出的方案，针对内部和外部源的波浪运动问题，对 Pine Flat 坝由于静态和动态载荷进行了二维有限元分析。