基于强度折减的岩质边坡失稳判据的探讨  

Study of Failure Criterion of Rock Slope Stability Analysis Based on Strength Reduction Method

作　　者：张鹏[1,2] 郭海庆[1,2] 

机构地区：[1]河海大学岩土工程科学研究所,江苏南京210098 [2]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098

出　　处：《水电能源科学》2012年第2期99-102,共4页Water Resources and Power

基　　金：中央高校基本科研业务费基金资助项目(2010B03914);国家自然科学基金资助项目(51139001)

摘　　要：以锦屏水电站左岸某标段边坡为例,基于有限元强度折减法的基本原理和破坏准则,提出了综合特征点位移增量与折减系数增量的比值关系曲线与迭代次数突变准则编制有限元程序计算边坡的安全系数。计算结果表明,两种失稳判据较吻合,误差仅为1.3%,位移突变与收敛合理,该判据正确、适用。Taking some part of Jinping hydropower slope for an example,based on fundamental principle and failure criterion of strength reduction finite element method,combination the ratio of feature point displacement increment and strength reduction increment and the iteration sudden change criterion is proposed to compute the safety factor of slope.The results indicate that the two failure criterions have good coherence and only 1.3% error;the sudden change of displacement and convergence are reasonable.So the proposed failure criterion is correct and applicable.

关 键 词：有限元 强度折减 锦屏电站边坡 安全系数 失稳判据 

分 类 号：TU457[建筑科学—岩土工程] TU432[建筑科学—土工工程]