有限元强度折减法在边坡计算中失稳判据的讨论

用有限元强度折减法的不同失稳判据对某一边坡安全系数进行评判，并与简化的Bishop法和不平衡推力法对所得到的安全系数进行对比。对比分析结果表明，以特征点位移突变和塑性区贯通作为判据计算的结果与简化的Bishop法和不平衡推力法计算得到的结果比较接近。建议采用特征点位移突变结合塑性区贯通作为边坡失稳的判据。

Discussion on Destabilization Criteria of Finite Element Strength Reduction Method in Slope Calculation

This paper uses different destabilization criteria in the finite element strength reduction method to judge the safety coefficient of some slope,and compares it with those obtained by means of simplified Bishop method and unbalanced thrust method.The result of comparison analysis shows that the result calculated by feature point displacement mutation and plastic zone perforation as the criteria is similar to the results calculated by means of the simplified Bishop method and unbalanced thrust method.The pap...