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    25 April 2021, Volume 50 Issue 11 Previous Issue    Next Issue
    Wave-Induced Dynamic Response of Seabed and Pile
    GUO Junjie, ZHOU Xianglian, XU Feng, WANG Jianhua
    2016, 50 (11):  1694-1699.  doi: 10.16183/j.cnki.jsjtu.2016.11.006
    Abstract ( 436 )   HTML ( 608 )   PDF (1216KB) ( 264 )   Save

    A coupled model was proposed to study the dynamic response of seabed and the mechanical response of pile under wave. The volume of fluid (VOF) method was used to track the free surface of water while the Navier-Stokes equations are regarded as governing equations of wave to investigate the dynamic interaction between the wave and the pile. Then, based on the CFD numerical model, a three-dimensional numerical coupled model of wave-seabed-pile was built to simulate the response of seabed and pile under wave. The seabed was treated as porous medium and characterized by Biot's consolidation theory and partly dynamic formulations. After the models were validated, parametric studies such as wave height, water depth and permeability were conducted and liquefaction potential was investigated.

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    Analysis of a Single Pile Response in a Saturated Seabed Under Short-Crested Wave
    HU Xiang, CHEN Jingjian, WANG Jianhua
    2016, 50 (11):  1737-1741.  doi: 10.16183/j.cnki.jsjtu.2016.11.013
    Abstract ( 371 )   HTML ( 312 )   PDF (781KB) ( 193 )   Save

    A 3D FEM model of a single pile in saturated sandy seabed was proposed to study the reponse of pile. Meanwhile, the quasi-static method and fluid-soil coupling and contact behavior on interface was considered. Based on numerical results, responses of the pore water pressure and stress of seabed soil under wave was studied, and the deformation and internal force of the single pile were discussed. Besides, two different methods to model the pile-soil interface were discussed with a comparison of the free field seabed model and seabed model with a totally embeded pile. The results show that the pore water pressure increases significantly near the mudline and bottom of pile. Responses of pore pressure and bending moment are evidently larger in the coupling model, but the displacement response is smaller. Moreover, the totally embeded pile model is mainly affected by seabed, as the wave dominatedly acts on the model with a pile out of the seabed.

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