基于统计损伤理论的沥青路面疲劳失效过程分析

Study on Fatigue Failure Process for Asphalt Pavement by Statistical Damage Theory

基于应变等价性假设,并结合统计损伤理论,建立了模拟沥青路面在载荷下变形过程的损伤本构模型。其次,在该本构模型的基础上,分析了路面变形过程中强度退化特性及疲劳失效条件,并进一步推导了在疲劳载荷下路面材料失效的判据,最后,通过分析表明本文方法的合理性与可行性。

Firstly, based on strain equivalence principle and statistical damage theory, the damage constitutive model of asphalt pavement was established for simulating on deformation process under load.Secondly, the reduction in strength of pavement and the condition of fatigue failure were analyzed in the deformation process, and the failure criterion of pavement under fatigue load was obtained. Finally, the analysis indicated that the rationality and feasibility for the method of this paper.