The proper modeling of frozen soils has to consider the coupled thermo-hydro-mechanical phenomena involved in the formation/thaw of ice in the porous space. The mechanical constitutive model is a key component in this analysis. The application of such a formulation may include replicating the effects of frost heave, foundation stability and the movement of ice in the permafrost regions. The mechanical behavior of soils is strongly affected by the presence of ice. A constitutive model to describe the behavior of soils containing ice is presented in this paper. The elastoplastic model proposed herein incorporates, amongst others, the effect of temperature and cryogenic suction to reproduce the changes in volume and strength observed in frozen soils. The finite element formulation is implemented into the fully coupled finite element program CODEBRIGHT. The model is then verified using a series of (already published) experimental results.
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