GENERAL FORMULATION OF A THREE DIMENSIONAL CONSTITUTIVE MODEL FOR PARTIALLY AND FULLY SATURATED SOILS BASED ON GIVEN FABRIC YIELD MODEL
A new general three-dimensional constitutive model is proposed for partially and fully saturated soils based on the Given Fabric Yield (GFY) model in Leroueil and Barbosa (2000) and Ghorbel (2006).Mohr-Coulomb failure criterion equations are adopted for the hexagon cone yield surfaces, and three constant-principal-stress planes are selected for the cap yield surfaces. Apparent cohesions are modified from constants to variables relating to activation of cap yield surfaces, so that consistent transition from shear yield to shear failure for cone model and continuous linking between the cap and cone yield surfaces can be fulfilled. The complex nonlinearity of the normally consolidation curve of the partially saturated soil can be considered in the strain hardening law. The anisotropic kinematic hardening effect due to suction is also illustrated. Generally, the parameters involved in the proposed model can be simply determined from laboratory experiments.
Cheng Zhou
Key Laboratory of Water Science and Engineering, Ministry of Water Resources, Nanjing 210024, P.R.China;Dept of Civil Engineering, Laval University, G1K 7P4, Quebec, Canada
国际会议
南京
英文
431-436
2007-04-21（万方平台首次上网日期，不代表论文的发表时间）