摘要
在分析常规应变条件下沥青混合料疲劳破坏发展的基础上,改进了AASHTO T321中所推荐的疲劳寿命计算方法,根据混合料劲度模量的变化规律,将疲劳破坏过程分为3个阶段,以第2个阶段的试验数据推算低应变条件下试件的疲劳寿命,并通过测试不同低应变水平下沥青混合料的疲劳性能,得出了山东省滨州地区长寿命路面沥青混合料的疲劳极限。结果表明:在低应变条件下,沥青混合料疲劳极限和应变水平仍符合幂函数疲劳方程。
Based on the analysis of fatigue failure development of asphalt mixture in the condition of conventional strain, authors improved the calculation method of fatigue life which was recommended in AASHTO T321. According to the change law of stiffness modulus of mixture, the fatigue failure process was divided into three stages. The fatigue life of samples in the condition of low strain based on the test data of the second stage was calculated. The fatigue limit of asphalt mixture in the perpetual pavement in Binzhou, Shandong Province by test of the fatigue performance of asphalt mixture in the condition of different low strain levels was got. The results show that the fatigue limit and strain level of asphalt mixture still follow power function fatigue equation in the condition of low strain.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2009年第1期34-38,共5页
China Journal of Highway and Transport
关键词
道路工程
长寿命路面
疲劳性能试验
沥青混合料
劲度模量
应变控制
road engineering
perpetual pavement
fatigue performance test
asphalt mixture
stiffness modulus
strain control
