考虑应变率效应的混凝土疲劳损伤本构模型  

Damage constitutive model of concrete for fatigue loading considering rate effect

作　　者：王龙飞[1,2] 王仙芝[3] 

机构地区：[1]甘肃省交通规划勘察设计院有限责任公司,甘肃兰州730030 [2]武汉理工大学道路桥梁与结构工程湖北省重点实验室,湖北武汉430070 [3]广东水利电力职业技术学院水利工程系,广东广州510635

出　　处：《华中科技大学学报（自然科学版）》2012年第5期84-88,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：中央高校基本科研业务费专项资金资助项目(2010-ZY-TJ-037)

摘　　要：基于边界面概念和连续损伤力学理论,建立了由应变控制的混凝土拉、压疲劳损伤本构模型.在此基础上,通过对应变能释放率Perzyna黏性规则化来考虑混凝土的应变率效应,从而获得了可以研究材料静力、动力和疲劳特性的统一混凝土疲劳损伤本构模型,并用C++语言编程对考虑应变率效应的混凝土本构关系和试验实例进行了计算和比较,结果表明该模型能较好地模拟混凝土应变率效应.Based on the concept of bo stitutive model was built, which was concrete. When the strain-rate effect undary surface and continuum damage mechanics, a damage con- controlled by strain and could analyze fatigue characteristics of was considered with Perzyna viscous regularization of strain-energy releasing rate in the above model, a general damage constitutive model was achieved for concrete under static, dynamic or fatigue loading. Through compiling program in C＋＋ language according to this model, and the strain-rate effect of concrete was simulated with the numerical method and compared with those numerical and experimental results in a reference. The results show that the damage constitutive model can simulate strain-rate effect of concrete well.

关 键 词：混凝土 边界面 损伤力学 疲劳 本构模型 应变率效应 黏性规则化 

分 类 号：TU375[建筑科学—结构工程]