摘要
根据低周疲劳的特点,对混凝土S-N曲线进行了适当简化,在此基础上提出了一种混凝土低周疲劳强度衰减模型及寿命预测方法,并通过疲劳试验确定了相关参数.与实测的疲劳变形发展过程及Miner准则对比分析得出,提出的模型及方法适用于混凝土低周疲劳,能较好地反映出混凝土的低周疲劳损伤机理.
According to the characteristic of low-cycle fatigue,the equation of S-N curve of concrete is simplified. A new model of strength degradation and the predictor method of life period for concrete under low-cycle fatigue loading are proposed,and the necessary parameters are obtained by the fatigue test.By comparison with the evolution of the actual strain and the Miner rule,the model and method are shown to reflect the damage of low-cycle fatigue of concrete correctly.
出处
《力学与实践》
CSCD
北大核心
2011年第2期35-38,共4页
Mechanics in Engineering
基金
国家自然科学基金(51009074)
云南省应用基础研究计划(2008ZC028M)资助项目
关键词
混凝土
低周疲劳
强度衰减
寿命预测
concrete
low-cycle fatigue
strength degradation
life prediction
