VISCOELASTIC FATIGUE DAMAGE MODEL OF BITUMINOUS MIXTURE
沥青混合料的粘弹性疲劳损伤模型研究

In this paper, the ``strain equivalent assumption' is introduced into the viscoelastic constitutive model of bituminous mixture and the dissipation energy expression with damage, the viscoelastic damage evolution law and the fatigue function under cycling loading are deduced. The viscoelatic fatigue damage model consists of three factors: stress, frequency and temperature. A qualitative analysis indicates that the viscoelatic fatigue damage model can be applied to analyze fatigue damage of asphalt pavement. Laboratory fatigue tests of bituminous mixture at different stresses, frequencies and temperatures are carried out on MTS to obtain the parameters of viscoelatic fatigue damage model and the viscoelatic fatigue damage model is verified.