Abstract: Calculation method of slope stability safety factor was proposed based on the Drucker- Prager criterion. Currently, the Mohr-Coulomb hexagon circumcircle Drucker- Prager criterion was adopted in the ANSYS program. For homoge?? neous slope, the safety factor with the Mohr-Coulomb hexagon circumcircle Drucker- Prager criterion was calculated by using ANSYS, therefore the safety factor could be obtained with the deduced conversion form ulae based on the Drucke r- Prager yield criterion. For the slope with multi-layer, the transformation of Drucker- Pragercr iterions was achieved by employing the value of c, ??of each layer, therefore the safety factor could be obtained based on the Drucker- Prager yield criterion. A series of case studies demonstrated the feasibility of the proposed method.

Key words: strength reduction of FEM, slope safety, yield criterion

摘要： 探讨了基于DP(Drucker-Prager)准则的边坡安全系数的计算方法。ANSYS有限元软件采用的岩土材料屈 服准则为莫尔-库仑六边形外接圆DP准则,对均质边坡,可先求出外接圆DP准则条件下的安全系数,然后利用安 全系数转换公式计算出各DP准则条件下的安全系数。对于具有多层土体的边坡,先通过调整各层土体的c,?? 值,以实现DP系列准则间的相互转换,再计算得到各DP准则条件下的安全系数。通过算例验证了所提出的方法 的可行性。

关键词: 有限元强度折减法, 边坡安全系数, 屈服准则