液化场地桥梁群桩基动力反应三维有限元模拟方法.pdf

u-p Nishi - Mindlin-Reissner 20 20-8 Wilson -  TU473.1 A 2013)S2040107 (1981 ) E-mail: tangliang@hit.edu.cn Numerical simulation of dynamic response for pile groups of bridges in liquefiable soils TANG Liang1, 2, 3, LING Xian-zhang1, 2, SU Lei1, 2, LIU Chun-hui1, 2, ZHANG Xiao-yu1 ,2, LI Qing-hua1, 2 (1. Key Lab of Structure Dynamic Behavior and Control (HIT), Ministry of Education, Harbin 150090, China; 2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; 3. State key laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China) Abstract: Based on the u-p formulas and the Biots dynamic coupled theory for saturated sand to consider the dynamic interaction of fluid and soil skeleton deformation, a three-dimensional (3D) numerical modelling of shaking table tests on dynamic soil-pile-bridge structure interaction in liquefiable soils is established using the Nishi model for sand and the Mohr-Coulomb model for clay. The pile and pier are simulated by 3D beam elements based on the Mindlin-Reissner theory. The clay and cap are divided with 20-node brick elements and the sand layer domains are discretized with solid-fluid fully coupled (u-p) 20-8 node brick elements. 3D line e