沥青混合料的疲劳效应研究  

Bituminous Mixture Fatigue Effect Study

作　　者：田小革[1] 吕松涛[1] 郑健龙[1] 

机构地区：[1]长沙理工大学公路工程学院,湖南长沙410076

出　　处：《公路交通科技》2005年第10期11-13,39,共4页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金资助项目(50178012)

摘　　要：对沥青混凝土梁式试件进行不同温度、不同应力水平条件下的拉伸疲劳试验,结果表明累计耗散能与疲劳寿命在双对数坐标中表现出较好的线性关系,温度和应力水平等试验条件对该关系的影响较小可以忽略。因此,指出可以采用累计耗散能理论来分析沥青混凝土的疲劳性能。运用该理论,通过对大量不同试验条件下的疲劳试验结果的分析,建立了沥青混凝土的疲劳方程。Tension fatigue tests were conducted on asphalt concrete beam samples under various temperature and stress conditions. The results indicate that there is a good linear relationship between accumulative dissipated energy and fatigue life in double logarithm coordinate system, whereas the effect of temperature and/or stress on this relationship is little. So the accumulative dissipated energy theory can be used to evaluate fatigue performance of asphalt concrete. A fatigue equation of asphalt concrete was put forward based on the test results under different conditions.

关 键 词：沥青混合料 累计耗散能 疲劳试验 疲劳方程 

分 类 号：U414.75[交通运输工程—道路与铁道工程]