Macroscopic and Mesoscopic Parameters Introduction into Stress-Strain Relationship Description of Clayey Soils

摘要

Disturbed state concept(DSC) theory maintains that the observed actual response(AR) of material under loading effects is composed of and determined by two reference state responses,namely relative intact(RI) state response and fully adjusted(FA) state response. Hardening material shows macroscopic behavior characteristics of RI response and shows negligible mesoscopic structure changes. Pore water pressure dissipation in macroscopic experiment or variance of computerized tomography(CT) value in mesoscopic experiment,as chosen characteristic parameters,can be introduced to the evolution function of disturbance factor to revise response of hardening to be response of softening. RI behavior is constituted via using hardening model. The characteristic parameters are extracted from regulations which exist in macroscopic or mesoscopic experimental data of softening material. DSC approach strategy on response prediction is presented through the combination of characteristic parameters and hardening constitutive model within the procedure of softening response prediction.