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Analysis of Nonlinear Stress and Strain in Clay under the Undrained Condition

Published online by Cambridge University Press:  16 June 2011

P.-G. Hsieh  and
C.-Y. Ou
P.-G. Hsieh*
Affiliation:
Department of Assets and Property Management, Hwa Hsia Institute of Technology, New Taipei City, Taiwan 23568, R.O.C.
C.-Y. Ou
Affiliation:
Department of Construction Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan 10672, R.O.C.
*
*Professor, corresponding author
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Abstract

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.

Keywords

Undrained soft clay modelStiffness degradationHigh stiffness at small strainStrength anisotropy
Type
Articles
Information
Journal of Mechanics , Volume 27 , Issue 2 , June 2011 , pp. 201 - 213
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2011

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