沥青路面粘弹性疲劳损伤分析

沥青混合料是一种粘弹性材料,而目前的沥青路面疲劳损伤分析方法大都采用传统的线弹性疲劳方程,无法反映环境温度、加载历史的影响.在分析作者提出的能够反映温度、行车速度和轴载影响的沥青混合料粘弹性疲劳损伤演化模型的基础上,提出了沥青混合料粘弹性疲劳损伤演化模型参数的试验方法和沥青路面粘弹性疲劳损伤分析简化方法,运用该方法分析了沥青路面在重复汽车荷载作用下疲劳损伤的演化进程,结果表明该粘弹性疲劳损伤演化模型是可以用来分析沥青路面疲劳寿命的.图2,表2,参10.

The Viscoelastic Fatigue Damage Developing of Asphalt Pavement

The fatigue damage developing of asphalt pavements was analyzed mostly with traditional linear elastic fatigue damage models,that could not express the influence of temperature and loading history to fatigue damage. But bituminous mixture was a kind of viscoelastic material,which mechanic property was influenced greatly by temperature and loading history. A viscoelastic fatigue damage model was developed that express the influence of temperature,velocity and loading. Based on the model,testing methods were developed to obtain the model parameters and simplified method was also put forward to analyze asphalt pavement. The fatigue damage developing of asphalt pavements under repeated traffic loading was analyzed with the methods. The results indicate that the methods are feasible to analyze viscoelastic fatigue damage development of asphalt pavement. 2figs.,2tabs.,10refs.