Critical state constitutive models and shear loading of overconsolidated clays with deviatoric hardening

Abstract

This paper presents an enhanced constitutive model integrating deviatoric hardening with a modified yield surface for overconsolidated clayey soils in a general framework of Cam-clay type models. Its performance was assessed with the simulation of drained and undrained triaxial tests on three clays at different consolidation states in comparison to two critical state models. The proposed model satisfactorily estimates the shear resistance, while capturing the smooth nonlinearity of the soil response.

Keywords

• constitutive models
• critical state
• overconsolidated clay
• shear loading
• deviatoric hardening