摘要
介绍一个新发展的三维弹粘塑性本构模型和它在软土有限元固结分析中的应用。在有限元固结分析中，变化蠕变参数Ψ／Ｖ，渗透系数ｋ和粘土厚度ｈ三关键参数来研究对变形，孔隙水压力的影响。本文特意研究孔隙水压力的变化。在其它条件相同下，有蠕变性质的土的孔隙水压力比无蠕变的土的孔隙水压力要高。蠕变有可能导致孔隙水压力不降反增。此被称为蠕变效应。对蠕变效应及其与ＭａｎｄｅｌＣｒｙｅｒ效应的区别有详细的解释和讨论。
A newly developed three dimensional elastic visco plastic (3 D EVP) model is introduced and implemented in a FE program for consolidation analysis of soft clay under uniform load. Three key parameters, i.e., creep parameter Ψ/V , permeability k , and clay layer thickness h are varied to investigate their influence on deformation and porewater pressure of the soil. When viscous effect is taken into account, porewater pressure in the soil will be higher than that without consideration of the viscous effect. It is found that larger creep parameter Ψ/V results in higher porewater pressure and larger deformation. The lower the permeability of soil, the higher the porewater pressure, and the larger the deformation. The mechanism of viscous effect on the porewater pressure is explained.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
1999年第3期360-365,共6页
Chinese Journal of Geotechnical Engineering
关键词
粘土
有限元
固结
变形
弹粘塑性
软土
clay, finite element, consolidation, porewater pressure, deformation, elastic visco plastic, MandelCryer effect, viscous effect Yin Jianhua He was awarded a B.Eng. from Chongqing Institute of Communications and Chongqing Institute of Architecture and E
