考虑损伤效应的冻粘土蠕变本构理论研究

Study on frozen soil creep constitutive of theory accounting for damage

摘要: 用简单的屈服函数作为冻土塑性损伤变量,对西源模型中的粘塑性蠕变量进行损伤修进。通过相关推导得到了冻土粘弹塑性损伤本构方程。通过用户子程序将此本构模型嵌入到大型商业有限元软件ADINA中。有限元计算结果表明:考虑损伤的冻土本构模型能较好的模拟加速蠕变阶段,可用于深井工程实践。

Abstract: The simple yield standard is used to determine the damage variables frozen soil, therefore Xiyuan Model viscoplastic creep is repaired.The constitutive function of the viscoelastic plastic damage-coupling is deduced.The viscoelastic plastic damage-coupling constitutive model for geo-materials is embeded into the commercial FEM software ADINA as a user's subroutine.FEM analysizing suggest that the model is of the feature of the non-linear accelerative creep frozen soil, and can be used for engineering practice.