基于耗散能原理的沥青混合料疲劳特性分析

Analysis of Fatigue Performance of Asphalt Mixture Based on Dissipated Energy Theories

耗散能原理在沥青混合料疲劳特性的研究中已获得应用,本文通过实验验证了沥青混合料累积耗散能与疲劳寿命之间的唯一对应关系,并根据Schapery相关法则对混合料疲劳特性问题中的粘弹性及非线性因素进行了分析。耗散能法基于粘弹性理论将伪变量的概念应用到混合料疲劳性能研究中,对于疲劳破坏的标准定义更为准确,是分析混合料疲劳特性的一种有效方法。

Dissipated energy theories have been applied to the study of fatigue performance of asphalt mixture. The sole corresponding relation between dissipated energy and fatigue life of asphalt mixture is proved through experiments. The problems of viscoelasticity as well as nonlinearity in fatigue performance are analyzed. Dissipated energy method is an effective way to analyze the fatigue performance of asphalt mixture as it introduces the concept of pseudo values into the research, thus defining the criterion of fatigue damage more accurately.