刚性挡土墙主动土压力数值分析  

NUMERICAL ANALYSES OF ACTIVE EARTH PRESSURE ON RIGID RETAINING WALL

作　　者：陈页开[1] 汪益敏[1] 徐日庆[2] 龚晓南[2] 

机构地区：[1]华南理工大学交通学院,广州510640 [2]浙江大学岩土工程研究所,杭州310027

出　　处：《岩石力学与工程学报》2004年第6期989-995,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金(59978045)

摘　　要：采用有限单元法对作用于刚性挡土墙上的主动土压力进行数值分析,土体采用弹塑性的Mohr-Coulomb本构模型,在土与结构接触面间引入无厚度的Goodman接触单元,接触面上剪应力和剪切位移采用弹塑性的本构模型,研究了不同挡土墙的变位模式、不同墙面摩擦特性以及土体变形特性等因素对土压力大小和分布的影响。In this paper, numerical analyses for active earth pressure problems of rigid retaining wall are performed,aiming at improving understanding of the factors governing the magnitudes and distributions of the earth pressures on retaining wall. Active earth pressure problems are analyzed by using a Mohr-Coulomb constitutive model of soil. A method to describe the frictional behavior between soil and wall is proposed using the elastoplastic joint elements. The computed variations of earth pressure with wall displacement in active states explain well the influence of the wall friction and the wall movement.

关 键 词：土力学 主动土压力 刚性挡土墙 变位模式 弹塑性 本构模型 

分 类 号：TU476.4[建筑科学—结构工程] TU432[建筑科学—土工工程]