ANALYSIS OF NONLINEAR STRESS AND STRAIN IN CLAY UNDER THE UNDRAINED CONDITION

作者：Hsieh P G^*; Ou C Y

来源：Journal of Mechanics, 2011, 27(2): 201-213.

DOI：10.1017/jmech.2011.24

• Undrained soft clay model
• Stiffness degradation
• High stiffness at small strain
• Strength anisotropy

Though the total stress undrained analysis approach in geotechnical engineering is widely utilized by practicing engineers, it has some intrinsic imperfections that cause the obtained parameters to have unavoidable empirical correlations. In this study, an undrained soft clay model is developed, which overcomes the imperfections of the conventional total stress undrained approach. In addition, the high soil stiffness at small strain and the concept of yield surface are employed to realistically simulate actual soil behavior. The model parameters can be obtainable directly from conventional laboratory tests. The model is validated through different laboratory stress path tests and strength tests in this paper.

• 出版日期2011-6