波浪作用下海床孔隙水压力发展过程与液化的数值分析  

Numerical analysis of residual pore water pressure development and evaluation of liquefaction potential of seabed under wave loading

作　　者：栾茂田[1] 张晨明[1] 王栋[1] 郭莹[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《水利学报》2004年第2期94-100,共7页Journal of Hydraulic Engineering

基　　金：国家自然科学基金(50179006);教育部跨世纪优秀人才培养计划研究基金

摘　　要：为了探讨波浪作用下海床的液化特性与孔隙水压力发展过程,本文在海床动力响应弹性分析的基础上,将不排水条件下孔压增长模式与动力固结方程相结合,对波浪作用下海床中瞬态与残余孔隙水压力的发展过程与变化规律进行了有限元模拟与分析;对善功企与山崎浩之所提出的海床液化评判准则进行了修正,根据所估算的总孔隙水压力,对波浪作用下海床的液化势进行了评价。In order to clarify the mechanism of wave induced liquefaction of seabed,numerical analysis based on elastic theory is carried out to evaluate dynamic response of seabed under wave loading.The empirical pattern of pore pressure generation of sand under undrained cyclic shearing is incorporated with Biot's coupling equations which governing vibration and consolidation coupling effects of seabed.A numerical procedure based on FEM is developed to assess the residual pore pressure.The criterion for assessment of liquefaction triggering proposed by Zen and Yamazaki is revised and then the revised criterion is employed to predict the liquefaction potential of the seabed on the basis of computed pore pressure.

关 键 词：海床 液化 波浪荷载 孔隙水压力 残余孔隙水压力 固结 有限元 

分 类 号：TU43[建筑科学—岩土工程] TV139.222[建筑科学—土工工程]