沥青路面反射裂缝问题的损伤力学守恒积分

Conservative Integral of Damage Mechanics for the ReflectiveCracking in Asphalt Pavements

基于损伤力学理论 ,建立了沥青路面反射裂缝问题的损伤力学守恒积分 ,证明了在反射裂缝形成过程中应变能密度的守恒性。在此基础上 ,导出了预估反射裂缝形成寿命的简便方法与公式。本文研究成果对于沥青路面设计与旧路补强设计具有一定理论指导意义。

The conservative integral of damage mechanics for the reflective cracking in asphalt pavements is established based on the elastic damage theory developed by the authors. It is demonstrated that the strain energy density is conservative during the damage process. A practical method for predicting the reflective crack initiation life is developed, and the corresponding formula in the closed form is obtained. The results provide the guidance for the asphalt pavement design and the old pavement reinforcement design.