MODELLING STRAIN-RATE-DEPENDENCY OF NATURAL SOFT CLAYS COMBINED WITH ANISOTROPY AND DESTRUCTURATION |
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| Authors: | Zhen-Yu Yin Minna Karstunen |
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| Institution: | 1 Department of Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China) (2 Department of Civil Engineering,University of Strathclyde,John Anderson Building,107 Rottenrow,Glasgow G4 0NG,UK) |
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| Abstract: | The paper aims to investigate modelling the strain-rate-dependency of natural soft clays combined with anisotropy and destructuration using an elasto-viscoplastic model.The model is based on Perzyna’s overstress theory and the elastoplastic model S-CLAY1S.Tests at constant strain-rate and creep tests under both one-dimensional and triaxial conditions on several clays are simulated.Simulations highlight the loading scenarios in which it is necessary to account for anisotropy and/or destructuration in order to get accurate predictions.Comparisons between the predicted and measured results demonstrate that the proposed model can successfully reproduce the time-dependent behaviour of natural soft clays under different loading conditions. |
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| Keywords: | anisotropic materials creep debonding time-dependent |
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