基于改进伏斯列夫面超固结黏土三维本构模型,利用有限元软件ABAQUS材料子程序接口,采用回映应力更新算法,实现了该模型在有限元分析中的应用。通过该模型与比奥固结理论的耦合,对超固结比为8的超固结黏土在三轴压缩、三轴伸长及平面应变应力条件下的变形局部化问题,进行了水-土耦合弹塑性有限元分析。分析结果表明:剪切带带内、带外点经历不同应力路径;剪切带带外单元经历了体缩、剪胀及被吸水体缩过程,而剪切带带内单元一直保持剪胀趋势;剪切带的形成伴随着剪胀,剪切带内、外出现了负的孔压,且孔压的分布也具有局部化特性。关于剪切带带内、外的孔隙水压及体变变化趋势与剪切速率有关,而平面应变介于三轴压缩与三轴伸长之间,但平面应变较早出现剪切带。孔隙水的迁移速度影响剪切带带内单元的剪胀,进而影响剪切带的形成及发展;而围压和弱单元位置也对剪切带的形成也有影响。 Based on the improvement of the three-dimensional constitutive model of over-consolidated clay, the finite element method ABAQUS material subroutine interface was used to update the model. The application of this model to the finite element analysis was realized. By coupling this model with the Biot consolidation theory, the deformation localization of overconsolidated clay with overconsolidation ratio of 8 under triaxial compression, triaxial elongation and plane strain stress was studied. Coupling Elastoplastic Finite Element Analysis. The analysis results show that the out-of-band points undergo different stress paths in the shear band and the out-of-band unit undergoes the process of body shrinkage, dilatancy and water absorption and shrinkage, while the unit in the shear band maintains the dilatancy tendency ; Shear band formation accompanied by dilatancy, shear band negative pressure occurs inside and outside, and pore pressure distribution also has localized characteristics. The trend of pore water pressure and volume change in the shear band is related to the shear rate. The plane strain is between the triaxial compression and the triaxial elongation, but the shear strain appears earlier in the plane strain. The migration speed of pore water affects the dilatancy of the unit in the shear zone, which will affect the formation and development of the shear zone. The confining pressure and the location of the weak element also affect the formation of the shear zone.