上海交通大学学报 ›› 2012, Vol. 46 ›› Issue (10): 1553-1557.doi: 10.16183/j.cnki.jsjtu.2012.10.004

所属专题: 王建华教授学报发文专辑

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波流共同作用下砂质海床动力响应

崔嵩1,2, 郑东生1, 叶冠林1,2, 夏小和2(), 王建华1,2   

  1. 1.上海交通大学土木工程系
    2.上海交通大学海洋岩土工程研究中心,上海  200240
  • 收稿日期:2011-10-14 出版日期:2012-10-01 发布日期:2012-10-30
  • 作者简介:崔嵩(1988-),男,河南省内黄县人,硕士生,研究方向为海洋土动力学.|夏小和(联系人),教授,博士生导师,E-mail:xhxia@sjtu.edu.cn.
  • 基金资助:
    上海交通大学海洋工程国家重点实验室自主研究项目(GKZD010053)

Dynamic Response of the Sandy Seabed to Combined Wave and Current Loading

CUI Song1,2, ZHENG Dong-sheng1, YE Guan-lin1,2, XIA Xiao-he2(), WANG Jian -hua1,2   

  1. 1.Department of Civil Engineering
    2.Center for Marine Geotechnical Engineering Research, Shanghai Jiaotong University, Shanghai 200240, China
  • Received:2011-10-14 Online:2012-10-01 Published:2012-10-30

摘要:

基于饱和土两相混合u-p(土骨架变形-饱和土孔隙水压力)理论,采用基于上下负荷面和各向异性的砂土液化本构模型,建立一个多孔介质弹塑性海床模型,用于分析波流共同作用下砂质海床动力响应规律.计算分析了波流共同作用下,砂质海床瞬时振荡孔隙水压力与残余孔隙水压力累积的响应规律,并获得了海床液化深度的变化规律.此外,比较了采用弹性与弹塑性砂土本构模型时,海床在波流作用下的动态响应差异.

关键词: 两相混合理论, 波流, 砂性海床, 波浪参数, 液化深度, 弹塑性本构

Abstract:

Based on two-phase u-p theory for saturated soil, a new constitutive model based on the super/ sub-loading surface and anisotropy was utilized to analyze the dynamic responds of a sandy seabed under the combined wave and current loadings. Firstly, a poro-elastoplastic model for a sandy seabed was established. The mechanics of oscillatory excess pore water pressure in seabed and residual excess pore pressure due to wave/ current were discussed and the liquefaction depth which changes correspondingly was obtained. A comparison between the elastic and elatoplastic sandy seabed's dynamic responds to wave/current loading was also presented.

Key words: two-phase mixture theory, wave/current, sandy seabed, wave parameter, liquefaction depth, elastoplastic model

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