重庆红粘土本构模型验证

Proof Test for Constitutive Model of Chongqing' s Laterite

以重庆红粘土为研究对象，通过对重庆红粘土在不同应力路径加荷条件下的应力－应变关系的分析研究，运用“土的本构关系图象程序”对重庆红粘土本构关系，进行了四种本构模型验证，认为非线性弹性成都科技大学Ｋ－Ｇ模型和殷宗泽双屈服面弹塑性模型能反映重庆红粘土应力－应变关系的本构模型，提供了相应的模型参数。

This paper studies Chongqing's laterite. A variety of stress path test of Chongqing's laterite are made on conventional triaxial apparatus by using a modified loading pattern. By using the constitutive relation's picture- program, the E- μ model, K- G model, modified Cambridge model and Z.Z Yin's elastoplastocity model are tested.The results show the K- G model of Chengdu University of Science and Technology and Z.Z.Yin's elastoplasticity model with two yield surface could agree with the constitutive model of Chongqing's laterite. The model parameters are given, and it can be used in numerial evaluation of geotechnical engineering practice