混凝土确定性及随机性损伤本构模型研究进展  

MODELS FOR DETERMINISTIC AND STOCHASTIC DAMAGE CONSTITUTIONS OF CONCRETE—A SHORT REVIEW

作　　者：余志武[1,2] 吴玲玉 单智[1,2] 

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中南大学高速铁路建造技术国家工程实验室,湖南长沙410075

出　　处：《工程力学》2017年第9期1-12,共12页Engineering Mechanics

基　　金：国家自然科学基金项目(51278469;U1434204)

摘　　要：混凝土损伤本构模型的建立对表征混凝土力学行为与认识其本质至关重要。从确定性与随机性两个层面梳理了国内外混凝土损伤本构模型的研究历史和最新进展情况,针对不同模型的损伤定义方式、损伤演化规律、损伤物理机制等进行探讨,通过对比分析总结了混凝土材料的非线性、随机性和动力荷载下的率敏感性等特征,提出发展混凝土损伤本构模型的关键问题,为建立更完善的混凝土损伤本构模型提供参考。The establishment of a concrete-damage-constitutive model is of great importance to characterize the behavior of concrete and understand the essence of concrete. The research history and the latest progress of concrete damage constitutive models in worldwide were summarized from deterministic and random aspects. The different definition methods, the evolution laws, and the physical mechanism of damage in the literatures are discussed. In addition, by comparing main characteristics such as nonlinearity, stochasticity and strain rate related, some critical issues need to be resolved for the accurate prediction of the concrete behavior are proposed, which provides a reference for establishing a more-reasonable and convenient concrete-damage-constitutive model.

关 键 词：混凝土 确定性损伤本构模型 随机性损伤本构模型 弹簧单元 不可复变形 

分 类 号：TU528[建筑科学—建筑技术科学]