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Consolidation and dynamics of 3D unsaturated porous seabed under rigid caisson breakwater loaded by hydrostatic pressure and wave

查看全文 作　　者：YE [1]JianHong;JENG [1]DongSheng;CHAN A H [2]C 高影响力作者 机构地区：[1]Division of Civil Engineering,University of Dundee,Dundee DD14HN,UK;[2]Department of Civil Engineering,University of Birmingham,Birmingham,B152TT,UK高影响力机构 出　　处：《Science China(Technological Sciences)》索引2012年第55卷第8期,共15页高影响力期刊 基　　金：the financial support from EPSRC #EP/ G006482/1;the funding support of Oversea Research Student Award from Scottish Government, UK 摘　　要：In this study,based on the dynamic Biot's theory 'u-p' approximation,a 3D finite element method(FEM) numerical soil model is developed,in which the Generalized Newmark-β method is adopted to determine the time integration.The developed 3D FEM soil model is a part of the coupled model PORO-WSSI 3D for 3D wave-seabed-marine structures interaction problem,and is validated by the analytical solution proposed by Wang(2000) for a laterally infinite seabed loaded by a uniform force.By adopting the developed 3D soil model,the consolidation of seabed under a caisson breakwater and hydrostatic pressure is investigated.The numerical results show that the caisson breakwater built on seabed has very significant effect on the stresses/displacements fields in the seabed foundation after the transient deformation and primary consolidation are completed.The parametric study indicates that the Young's modulus E of seabed is the most important parameter to affect the settlement of breakwater,and the displacement fields in seabed foundation.Taking the consolidation status as the initial condition,the interaction between ocean wave,caisson breakwater and seabed foundation is briefly investigated.The 3D ocean wave is determined by solving the Navier-Stokes equations with finite volume method(FVM).The numerical results indicate that there is intensive interaction between 关 键 词：三维有限元法 静水压力 动态加载 NAVIER-STOKES方程 海底 沉箱 非饱和 三维有限元分析
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