A constitutive model for structured soils

The paper proposes a constitutive model for structured soils (MSS) which describes the engineering effects of structure development and degradation, such as: high intact stiffness and strength, appreciable reduction of stiffness and strength due to de-structuring, and evolution of stress- and structure-induced anisotropy. A key feature of the model is the treatment of pre-consolidation as a structure-inducing process and the unified description of all such processes via a ‘bond strength envelope’ associated with the onset of appreciable de-structuring and distinguished from the onset of plastic yielding. Other features include: a damage-type mechanism to model volumetric and deviatoric structure degradation, the evolution of stress- and bond-induced anisotropy using a fading memory scheme, adaptable predictive capabilities depending on the sophistication of the available test data, modularity to extend its applicability in several soil types, and mathematical formulation in a general tensorial space to fa...

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