摘要
土体本构模型和液化分析是进行土体动力反应分析的主要研究内容。将土体作为液固两相孔隙介质,考虑土体骨架与孔隙流体之间的动力相互作用,采用基于广义塑性理论的PZ模型来模拟土体,分析土体在地震动荷载作用下的响应。通过研究土体内孔隙水压力产生、消散过程及土体有效应力的变化过程来进行土体液化的判定,利用这种方法可以得到土体在地震荷载作用下的液化深度。
Constitutive model and analysis of soil liquefaction are two major issues in the area of soil dynamic response analysis.In this work,soil response under seismic load was analyzed with a PZ model of the general plasticity theory.Soil is treated as solid-liquid two-phase porous media,and dynamic interaction between soil skeleton and pore fluid is considered.A criterion of soil liquefaction is established through a study of the generation and dissipation process of soil pore water pressure and the variations of effective soil stress.By this method,soil liquefaction depth under earthquake load can be obtained.
出处
《水力发电学报》
EI
CSCD
北大核心
2012年第1期99-102,107,共5页
Journal of Hydroelectric Engineering
基金
水利部公益项目边坡地震失稳机理与抗震安全度评价方法研究(201001035)
河海大学自然科学基金(2009421811)
中央高校基本科研业务费专项资金资助(2009B07314)
江苏高校优势学科建设工程资助项目(水利工程)
关键词
岩土力学
液化分析
动力分析
PZ模型
土体本构模型
rock-soil mechanics
liquefaction analysis
dynamic analysis
PZ model
constitutive model of soil
