上海交通大学学报

上海交通大学学报（自然版） ›› 2013, Vol. 47 ›› Issue (09): 1404-1408.

• 建筑科学 • 上一篇    下一篇

基于Drucker-Prager系列准则的抗剪强度参数分析

李磊，张孟喜   

  1. (上海大学 土木工程系， 上海 200072)
  • 收稿日期:2012-12-03 出版日期:2013-09-28 发布日期:2013-09-28
  • 基金资助:

    国家自然科学基金项目(41172238),上海市教委科研创新项目(11ZZ88),上海大学研究生创新基金项目(SH

Analysis on Shear Strength Parameters Based on Drucker-Prager Yield Criteria

LI Lei,ZHANG Mengxi
  

  1. (Department of Civil Engineering, Shanghai University, Shanghai 200072, China)
  • Received:2012-12-03 Online:2013-09-28 Published:2013-09-28

摘要：

在真三轴应力状态下建立了岩土材料内摩擦角与中主应力系数的函数关系，通过与砾石料、Q2黄土和Santa Monica Beach砂的真三轴试验结果对比，探讨了基于Drucker-Prager(D-P)系列屈服准则的内摩擦角与中主应力系数的关系，以及D-P系列屈服准则的适用性.结果表明：当中主应力系数取特定值时，D-P系列屈服准则中内摩擦角的理论值与试验值相等；在不同应力状态下，岩土材料应选用合适的D-P系列屈服准则，以使内摩擦角的理论值与试验值基本吻合.
 

关键词: 岩土力学； Drucker-Prager系列屈服准则； 中主应力； 内摩擦角； , 真三轴试验

Abstract:

The mathematical expressions of internal friction angle considering the influence of intermediate principal stress under true triaxial stress were deduced. After a comparison of the results of the true triaxial tests of gravel, Q2 loess and Santa Monica Beach sand, the relationships between internal friction angle and intermediate principal stress coefficient were studied based on DP yield criteria. The results show that the calculated values of internal friction angle with D-P yield criteria equal the testing results when the intermediate principal stress coefficient is suitable for the corresponding criterion. In order to obtain reasonable results, appropriate D-P yield criteria should be chosen for different materials.
 

Key words: rock and soil mechanics, Drucker-Prager(D-P) yield criteria, intermediate principal stress, internal friction angle, true triaxial test

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