A 2.5-D coupled FE-BE model for the dynamic interaction between saturated soil and longitudinally invariant structures

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• 作者：Chao He ^{1310756@tongji.edu.cn} ; Shunhua Zhou ; ^{zhoushh@tongji.edu.cn} ; Honggui Di ^{dihongguila@126.com} ; Yao Shan ^{shanyao@tongji.edu.cn}
• 关键词：Saturated soil ; Longitudinally invariant structure ; Dynamic soil&ndash ; structure interaction ; Finite element&ndash ; boundary element coupling ; 2.5-D modelling
• 刊名：Computers and Geotechnics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：82
• 期：Complete
• 页码：211-222
• 全文大小：1315 K
• 卷排序：82

文摘

A two-and-a-half-dimensional (2.5-D) coupled finite element–boundary element (FE–BE) model is presented to simulate the three-dimensional dynamic interaction between saturated soils and structures with longitudinally invariant geometries. A regularized 2.5-D boundary integral equation for saturated porous media is derived that avoids the evaluation of singular traction integrals. The 2.5-D coupled FE–BE model is established by using the continuity conditions on the soil–structure interface. The developed model is verified through comparison with an existing semi-analytical method. Two case studies of a tunnel embedded in a poroelastic half-space and the efficiency of a vibration isolating screen are presented.