Constitutive Modeling for Overconsolidated Clays Based on Disturbed State Concept. II: Validation

• Published in: International journal of geomechanics Vol. 19; no. 9
• Main Authors: Xiao, Yang, Desai, Chandrakant S
• Format: Journal Article
• Language: English
• Published: Reston American Society of Civil Engineers 01-09-2019
• Subjects: Axial strain; Axial stress; Clay; Dilatancy; Disturbance; Evolution; Mathematical models; Parameters; Plastic deformation; Pore pressure; Pressure; Shear strength; Shearing; Technical Papers; Volumetric strain
• ISSN: 1532-3641; 1943-5622
• DOI: 10.1061/(ASCE)GM.1943-5622.0001475

AbstractThe disturbed state concept (DSC)-based model for overconsolidated clay was proposed mainly in a previous paper that aims to analyze the influences of the model parameters on model predictions, calibrations of the model parameters, and the model validation through different overconsolidated clays. It is found that the disturbance parameter in the model predictions can greatly influence the evolution of stress, volumetric strain, undrained shear strength, and excess pore pressure with axial strain. Detailed calibrations of the model parameters, such as the disturbance parameter, potential-failure and dilatancy parameters, and plastic modulus parameters, are introduced. The comparison results demonstrate that the DSC-based model predictions are in good agreement with the test data of different overconsolidated clays on strain softening and volumetric expansion under the drained condition, as well as the evolution of undrained shear strength and excess pore pressure during the undrained shearing process.