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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2010, Vol. 29 ›› Issue (4): 582-586.

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基于Drucker- Prager系列准则的边坡安全系数 计算方法

熊欢, 肖盛燮   

  1. 重庆交通大学土木建筑学院, 重庆 400074
  • 收稿日期:2010-05-04 修回日期:2010-06-07 出版日期:2010-08-15 发布日期:2015-01-22
  • 作者简介:熊欢(1986—),男,湖北荆州人,硕士研究生,主要从事岩土边坡工程稳定性方面的研究工作。E-mail:xionghuan000@163.com。
  • 基金资助:
    国家自然科学基金资助项目(50879097)

Calculation Method of Slope Stability Safety Factor Based on the Drucker-Prager Criterion

XIONG Huan, XIAO Sheng-xie   

  1. School of Civil Engineering & Architecture, Chongqing Jiaotong University, Chongqing 400074, China
  • Received:2010-05-04 Revised:2010-06-07 Online:2010-08-15 Published:2015-01-22

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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

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

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