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.
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.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2012年第10期1553-1557,共5页
Journal of Shanghai Jiaotong University
基金
上海交通大学海洋工程国家重点实验室自主研究项目(GKZD010053)
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
two-phase mixture theory
wave/current
sandy seabed
wave parameter
liquefaction depth
elastoplastic model
