Numerical Modeling of Cyclic Triaxial Experiments for Granular Soil
Publication: International Journal of Geomechanics
Volume 17, Issue 6
Abstract
In this study, cyclic triaxial tests under isotropic and anisotropic stress consolidation conditions were performed on Nuozhadu granular soil, and a constitutive model based on the Bouc–Wen model and endochronic theory was applied to investigate the dynamic stress–strain relationship and pore-water pressure of granular soils under cyclic triaxial stress states. In the isotropic stress consolidation condition, dynamic stress degradation occurred as a result of increased pore-water pressure and the reduction of effective stress. This paper presents the general validity of the model and its ability to describe several features of granular soil, including soil cyclic mobility, plastic strain accumulation, and stiffness and strength changes resulting from cyclic loading. Then, the equation of the model and key model parameters related to soil behavior, such as hysteresis and contractive and dilative behaviors, are further discussed. The proposed model was used to simulate the dynamic stress–strain relationship, effective stress path, and increased pore-water pressure under undrained conditions. The numerical results were found to have good agreement with the experimental curves.
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Acknowledgments
The authors are grateful to the anonymous referees for their valuable comments and suggestions for improving the presentation of this paper. The research described in this paper was financially supported by the Natural Science Foundation of China (Grants 51179024 and 51379029).
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Information & Authors
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Published In
International Journal of Geomechanics
Volume 17 • Issue 6 • June 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Apr 11, 2016
Accepted: Sep 13, 2016
Published online: Nov 18, 2016
Discussion open until: Apr 18, 2017
Published in print: Jun 1, 2017
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