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.