摘要
采用Mohr-Coulomb和Drucker-Prager准则分析了应用强度折减法进行边坡稳定有限元分析时屈服准则对计算结果的影响。分析表明,屈服准则对边坡稳定有限元分析结果影响显著,不同屈服准则计算的边坡位移场和应力场有显著差异。其中,Mohr-Coulomb准则计算的安全度偏小,但内接圆及等面积圆得出的安全度较合理,Drucker-Prager准则与参数α和k的选取直接相关。该研究结果可为边坡稳定有限元分析合理选用屈服准则提供理论依据。
Using Mohr-Coulomb and Drucker-Prager yield criteria, the influence of yield criterion on the anlysis of slope stabilization by FEM with strength reduction was analyzed. It is shown that the computing results are obviously influenced by the yield criterion. The stress and displacement fields are also different from Mohr-Coulomb criterion to Drucker-Prager criterion. The safety degree using Motr-Coulomb criterion is smaller. And the safety degree is related to the parameters such as a and k when using Drucker-Prager criterion. It is more reasonable when a and k are computed by the circle connecting inner vertexes of Mohr-Coulomb criterion and by the circle which area is equal to the area of Mohr-Coulomb criterion. Research can provide useful references for choosing the yield criterion in the shope stabilization analysis by FEM.
出处
《水电能源科学》
北大核心
2009年第1期137-139,136,共4页
Water Resources and Power
基金
国家自然科学基金委员会
二滩水电开发有限责任公司雅砻江水电开发联合研究基金资助项目(50539030)
国家重点基础研究发展计划(973项目)基金资助项目(2007CB714104)
关键词
屈服准则
边坡稳定分析
强度折减
有限元法
安全度
yield criterion
slope stabilization analysis
strength reduction
finite element method
safety degree
