冻粘土蠕变损伤耦合本构关系研究  

Study of Frozen Soil Creep Damage-Coupling Constitutive Function

作　　者：李栋伟[1] 汪仁和[1] 胡璞[2] 

机构地区：[1]安徽理工大学土木工程系,安徽淮南232001 [2]安徽省建设厅,安徽合肥230001

出　　处：《冰川冻土》2007年第3期446-449,共4页Journal of Glaciology and Geocryology

基　　金：安徽省高校青年教师基金项目(2007JQ1044);安徽省自然科学基金项目(050440501);安徽理工大学青年教师基金项目(QN200607);安徽理工大学博士;硕士基金项目资助

摘　　要：以冻土试验为基础,提出了冻粘土服从DP屈服准则的粘塑损伤变量,通过推导得到了相关联流动法则下的冻土粘弹塑性损伤耦合本构方程.为了研究粘弹塑性和损伤的耦合作用,将建立的冻土材料粘弹塑性损伤耦合本构模型,通过用户子程序嵌入到ADINA有限元中.结果表明:粘弹塑损伤耦合本构模型能较好的模拟冻粘土加速蠕变过程,与实测蠕变吻合较好.Based on frozen soil experiments and Nishihara Model, The D-P yield standard is used to determine the damage variables of frozen soil; The constitutive relationship of the viscoelastic plastic damage-coupling constitutive function in association with plastic flow law is deduced. The viscoelastic plastic damage-coupling constitutive model for geo-materials is embedded into the commercial FEM software ADINA as a user＇s subroutine. Comparing the final fitting curves of the triaxial stress creep experiments and the theory calculation indicate that the theoretical result coincides with the experimental ones very well. The model is available for the non-linear accelerative creep of frozen soil.

关 键 词：冻土 D-P屈服准则 弹粘塑损伤耦合本构方程 ADINA程序 

分 类 号：TU452[建筑科学—岩土工程]