Abstract: The constitutive equation of asphalt mixture is described by the Johnson-Cook model. The model parameters of base asphalt mixture and modified asphalt mixture are gained by uniaxial compression experiments of different temperatures and different strain rates. Based on the ANSYS transient dynamic theory，the effects of asphalt pavement rutting of the number of equivalent axle load，temperature and overloading are analyzed. The results indicate the anti-rutting performannce of nature rock asphalt modified asphalt mixture is 20% higher than the anti-rutting performannce of base asphalt mixture， which is consistent with the asphalt pavement rutting deformation of the actual situation. The rutting caculaiton method based on the Johnson-Cook viscoplastic model is put forward，which provides a new method for asphalt pavement rutting analysis.

Key words: asphalt pavement, viscoplasticity, Johnson-Cook model;rutting, FEM analysis

摘要： 采用Johnson-Cook模型描述沥青混合料黏塑性本构关系，通过不同温度和不同应变率下单轴压缩试验确定 沥青和改性沥青混合料的Johnson-Cook黏塑性模型参数，利用ANSYS瞬态动力学分析理论，分析了在设计年限内 当量轴次和超载等不同条件下对沥青路面车辙变形的影响。结果表明:使用天然岩沥青改性沥青面层比基质沥青 面层的抗车辙性能均提高20%，符合沥青路面车辙变形实际情况;基于Johnson-Cook黏塑性模型的车辙计算方法， 为沥青路面车辙研究提供了一种新的思路和技术途径。

关键词: 沥青路面, 黏塑性, Johnson-Cook模型, 车辙, 有限元分析