An extended polygon scaled boundary finite element method for the nonlinear dynamic analysis of saturated soil

被引:30
作者
Zou, Degao [1 ,2 ]
Teng, Xiaowei [1 ,2 ]
Chen, Kai [1 ,2 ]
Yu, Xiang [1 ,2 ]
机构
[1] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Liaoning, Peoples R China
[2] Dalian Univ Technol, Sch Hydraul Engn, Dalian 116024, Liaoning, Peoples R China
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
Saturated soil; Dynamic consolidation; Scaled boundary finite element method; Polygon; Pore pressure; TRANSIENT WAVE-PROPAGATION; GENERALIZED PLASTICITY; CRACK-PROPAGATION; POROUS-MEDIA; FORMULATION; BREAKAGE; ACCURACY; BEHAVIOR; PRIMER; MODEL;
D O I
10.1016/j.enganabound.2018.03.019
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this paper, the polygon scaled boundary finite element method is extended to analyze saturated soil based on the generalized Biot's dynamic consolidation theory. The displacement shape functions of the polygon element are obtained by elastic static theory while the pore pressure shape functions are constructed from steady-state seepage theory. A scaled boundary polygon equations for saturated soil is established by applying Galerkin method. Two sets of Gauss points are adopted, including Gauss points of line utilized to compute the shape functions and Gauss points of area employed to realize material nonlinearity. In order to verify and assess the reliability and accuracy of the presented method, a saturated elastic half space subjected to a uniform cyclic dynamic loading is simulated and the results are compared with the analytical solution. Moreover, a liquefaction analysis of a breakwater built on saturated sand soil with generalized plastic model is subsequently carried out. The results correspond well with those calculated by finite element method (FEM), which indicates the significant capability of the current method in solving nonlinear problems. The proposed method processes extraordinary mesh flexibility and fast reconstruction, which will make it a promising tool in liquefaction analysis.
引用
收藏
页码:150 / 161
页数:12
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