混凝土疲劳分析方法综述  

REVIEW OF THE ANALYSIS METHODS OF FATIGUE OF CONCRETE

作　　者：丁兆东[1] 李杰[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《力学与实践》2015年第1期40-48,共9页Mechanics in Engineering

基　　金：国家自然科学基金重大研究计划项目资助(91315301)

摘　　要：从探究物理机制的视角对混凝土疲劳研究进行了逻辑上的梳理,表明既有研究可分为3类主要模型:基于疲劳试验分析的现象学模型、基于断裂力学的疲劳裂纹扩展模型和基于损伤力学的疲劳损伤演化模型.通过解析具有典型性的研究,论述了不同类型研究的特点.进而,从还原论的角度出发,阐明了速率过程理论可以作为解释混凝土材料疲劳损伤演化的物理基础.注意到疲劳试验结果所表现出的显著随机性,阐述了应以物理随机系统思想研究混凝土疲劳问题的观点.The paper reviews the studies of fatigue of concrete with a logical perspective focusing on the internal mechanism. It is shown that the existing researches can be classified into three main types： the phenomenon models based on fatigue tests, the fatigue crack propagation models based on fracture mechanics and the fatigue damage evolution models based on damage mechanics. The main features of each kind of models are summarized. Further, it is suggested that the rate process theory can explain the physical foundation of fatigue of concrete from the viewport of reductionism. In view of the considerable scatters in the results of concrete fatigue tests, the concept of the physical stochastic system is proposed.

关 键 词：混凝土 疲劳 物理机理 随机性 

分 类 号：O346.2[理学—固体力学]