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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.
The paper aims to investigate modeling 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-CLAY 1 S. 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 behavior of natural soft clays under different loading conditions.