Multipotential Surface Elastoplastic Constitutive Model and Its Application in the Analysis of the Phase II Cofferdam of the Three Gorges Project

Based on multipotential surface theory, an elastoplastic constitutive model is established in this paper. The required parameters of the proposed are same as those Duncan-Chang model, and no longer restricted by generalized form Hooke’s law. In addition, uses a numerical method to fit test curves determine parameters. calculation program also developed FLAC3D, according comparison with triaxial results gravel stress deformation analysis phase II cofferdam Three Gorges Project, rationality superiority verified.