A constitutive model for unsaturated cemented soils under cyclic loading

Details A constitutive model for unsaturated cemented soils under cyclic loading A constitutive model for unsaturated cemented soils under cyclic loading

2008-10-24

arxiv.org/abs/0810.4454v1

Computers and Geotechnics 35, 6 (2008) 853-859

Physics

Classical Physics

Scientific paper

10.1016/j.compgeo.2008.08.005

On the basis of plastic bounding surface model, the damage theory for structured soils and unsaturated soil mechanics, an elastoplastic model for unsaturated loessic soils under cyclic loading has been elaborated. Firstly, the description of bond degradation in a damage framework is given, linking the damage of soil's structure to the accumulated strain. The Barcelona Basic Model (BBM) was considered for the suction effects. The elastoplastic model is then integrated into a bounding surface plasticity framework in order to model strain accumulation along cyclic loading, even under small stress levels. The validation of the proposed model is conducted by comparing its predictions with the experimental results from multi-level cyclic triaxial tests performed on a natural loess sampled beside the Northern French railway for high speed train and about 140 km far from Paris. The comparisons show the capabilities of the model to describe the behaviour of unsaturated cemented soils under cyclic loading.

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