沥青疲劳性能评价指标的研究

Research on Fatigue Performance Evaluation Index of Asphalt

疲劳破坏已经成为路面最主要的破坏形式之一,对沥青及沥青混合料疲劳性能进行深入研究至关重要。采用三种指标(模量降低为初始模量50%的作用次数、疲劳因子、累计耗散能)评价了两种沥青的疲劳性能,对评价结果进行了比较分析,并对评价指标的适用性进行了初步探讨。

Fatigue failure has become one of the most important failure modes of pavement. As for the fatigue performance of asphalt and asphalt mixture,three kinds of index modulus reduction like action times of 50% of initial modulus,fatigue factor,accumulative dissipative energy are adopted,the fatigue performance of two kinds of asphalts is evaluated,the comparative analysis on the evaluation results is made,and the preliminary discussion on the applicability of the evaluation index is made.