摘要
强度折减有限元法在土坡稳定性分析中已得到广泛应用,但目前大多针对均质土坡,较少涉及非均质土坡.将强度折减有限元法应用于非均质土坡,首先要解决非均质土坡失稳判据的选取问题.基于ABAQUS有限元软件,实现了强度折减的自动运行,探讨了各种失稳判据对非均质土坡安全系数取值的影响,分析了非均质土坡失稳破坏的过程,提出了以特征点位移矢量突变结合塑性区贯通的失稳判据,其更能反映非均质土坡真实的稳定性.
Though the strength reduction finite element method on soil slope stability analysis has been widely applied, it is mostly used in homogeneous slopes, less involved in non - homogeneous slopes. The selection of instability criterions should be solved when the strength reduction finite element method is applied to inhomo- geneous slopes firstly. In this paper, based on ABAQUS finite element software by achieving the automatic op- eration of strength reduction, the influence on safety factor caused by different instability criterions is dis- cussed, and the process of instability in inhomogeneous slope is analyzed. Thus, a instability criterion which using the instability criteria according to the mutation of the displacement at a feature nodal combing plastic zone extension is put forward, and it can better reflect the stability of the inhomogeneous soil slopes.
出处
《河南理工大学学报（自然科学版）》
CAS
北大核心
2013年第1期89-92,共4页
Journal of Henan Polytechnic University（Natural Science）
基金
"十二五"国家科技支撑计划课题项目(2012BAB05B04)
重庆市科技攻关项目(CSTC2011GGA30001)
关键词
非均质土坡
强度折减法
失稳判据
安全系数
inhomogeneous slope
strength reduction method
instability criterion
safety factor
