摘要
为了研究强度折减有限元法中各种边坡失稳判据的适用性,在典型算例分析计算的基础上,提出了"失稳判据的选择应和所采用的数值计算的迭代方法、应变模式假定等问题相匹配"的观点.研究结果表明,当采用数值计算不收敛判据时,应采用小应变模式假定,并利用弧长控制方法;当采用坡面位移突变判据时,应采用大应变模式假定;塑性应变区贯通判据可作为上述两种判据的参考.大量算例的计算结果表明,强度折减有限元法计算获得的边坡稳定性系数和极限平衡法计算结果的相对差小于3%.
A viewpoint that failure criterion should be matched with numerical calculation＇s iterative algorithm, strain mode assumption and other corresponding problems was put forward based on calculation and analysis of typical examples to study the applicability of different slope failure criterion in shear strength reduction finite element method （SSRFEM）. When the divergence criterion of numerical calculation is used, small strain mode and arc-length control method should be employed; when the criterion of mutational displacement on slope surface is used, large strain mode should be employed. Plastic strain zone connection criterion can be used as a reference of the above two criteria. The results of some slope stability examples showed that the relative difference of stability factors obtained by SSRFEM and limit equilibrium method was less than 3 %.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2008年第1期83-87,共5页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金资助项目(4067218540502026)
浙江省重大科技专项社会发展重点资助项目(2006C13027)
中国博士后科学基金资助项目(20070421201)
关键词
边坡稳定性
强度折减有限元法
失稳判据
稳定系数
slope stability
shear strength reduction finite element method （SSRFEM）
failure criterion
stability factor
