摘要
以现象学法为基础,结合损伤力学原理,提出了纤维沥青混凝土疲劳破坏准则.通过不同频率、应力水平纤维沥青混凝土劈裂疲劳试验,研究了加载频率对沥青混凝土疲劳性能的影响,建立了不同频率下沥青混凝土疲劳寿命计算模型.试验研究和理论分析表明:疲劳加载频率越低,沥青混凝土疲劳寿命对应力水平的变化就越敏感,低速、重载交通是造成沥青混凝土疲劳破坏的重要原因.
Based on phenomenological method, combined with the principle of damage mechanics, the fatigue failure criterion of fiber reinforced asphalt concrete was put forward. Through the splitting fatigue test of fiber reinforced asphalt concrete under different loading frequency and stress level, influence of loading frequency on fatigue properties of asphalt concrete was studied, and fatigue life calcula- tion model of asphalt concrete was established. The experimental study and theoretical analysis showed that, to the change of stress level, the lower fatigue loading frequency was, the more sensitive asphalt concrete＇ s fatigue life was. Low speed and heavy traffic was the important reason which caused asphalt concrete＇s fatigue failure.
出处
《华北水利水电学院学报》
2012年第6期106-111,共6页
North China Institute of Water Conservancy and Hydroelectric Power
基金
国家自然科学基金重点项目(50678159)
关键词
纤维沥青混凝土
疲劳性能
劈裂疲劳试验
加载频率
fiber reinforced asphalt concrete
fatigue performance
splitting fatigue test
loading frequency
