Sensitivity Analysis of Parameters in SYS Cam-Clay Model

Bin Bin Xu; Toshihiro Noda; Kentaro Nakai

doi:10.4028/www.scientific.net/AMR.1030-1032.864

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1030-1032Sensitivity Analysis of Parameters in SYS Cam-Clay...

Sensitivity Analysis of Parameters in SYS Cam-Clay Model

Abstract:

The SYS Cam-clay model, which is extended based on the Cam-clay model and the critical state theory, is able to describe the heavily overconsolidated and structure soils. However compared with Cam-clay model with five elasto-plastic parameters there are six additional evolutional parameters in SYS Cam-clay model and the sensitivity analysis of the new added parameters should be carried out. Through the calculation of constitutive response assuming the uniform deformation field, the sensitivities of degradation index of structure, degradation index of overconsolidation ratio and rotational hardening index are investigated respectively. It can be seen that the peak strength and the “rewinding behavior” in the effective stress path are influenced greatly while there is no coupling effect of these parameters mutually. The initial overconsolidation ratio and degree of structure also have an effect on the mechanical behavior and the initial specific volume.