沥青混凝土长期耐久性能在统计学上的分布规律研究

已有研究通常采用正态分布来描述沥青混凝土的疲劳耐久性,但是由于材料本身以及试验环境条件的变异性,试验所得的疲劳耐久性能具有很大的离散性。依据大量室内试验并优选代表性强的数据源,利用双参数Weibull分布理论验证沥青混凝土材料的疲劳耐久性能在统计学上的分布规律,并回归得到了不同失效概率条件下的疲劳寿命方程。结果表明:Weibull分布理论能够较好地描述多因素复杂条件下沥青混凝土的疲劳耐久性分布特征。

Research on Distribution Rule of Long -Term Durability Performance of Asphalt Concrete in Statistics

The existing research usually adopts normal distribution to describe the fatigue durability of asphalt concrete,however,due to variability of materials and test environment,the test result of fatigue durability performance has great discreteness.According to a large amount of indoor tests and preferable selection of typical data source,with double parameter Weibull distribution theory,the distribution rule of fatigue durability performance of asphalt concrete in statistics is verified and fatigue life equation under the conditions of different probability of failure is obtained through regression.The result shows that the distribution features of fatigue durability of asphalt concrete under complicated conditions of multi factors could be described well with Weibull distribution theory.