中文摘要：

沥青混合料应变在一定温度和外荷载作用下会随着时间增长而逐渐增加的现象称为蠕变;重复加载蠕变实验反映了路面荷载和变形的响应关系,常用于分析路面高温抗车辙性能.为了真实模拟路面的力学状况和描述沥青混合料的动态蠕变性能,对四种沥青和两种沥青混合料进行动态蠕变实验;研究发现沥青混合料的动态蠕变呈非线性,同时采用经典BurGgers模型与由Maxwell体和分数阶Kevin体串联组合的分数阶导数Burgers模型对沥青混合料蠕变曲线进行拟合,并对比分析其拟合结果.结果表明,分数阶模型参数a代表了材料的记忆特性,分数阶导数BurGgers模型可定量的描述沥青混合料动态蠕变性能的非线性,能更好的分析其高温性能.

英文摘要：

Under certain temperature and external loads,the strain of asphalt mixtures will occur gradually with increasing of time,this phenomenon is called creep of asphalt mixtures or asphalt pavements.The repeated load creep tests reflected the relationship of the traffic load and deformation response and commonly used to analysis the rutting resistance performance of asphalt pavements at high temperature.In order to simulate the mechani-cal condition of asphalt pavements and describe the dynamic creep properties of asphalt mixtures,the dynamic creep tests of four asphalts and two asphalt mixturesdynamic creep test were carried out in this paper.During the dynamic creep tests,it is found that dynamic creep of asphalt mixtures was nonlinear;meanwhile the dy-namic creep test data are fitted using classic Burgers model and fractional derivative Burgers with the series combination of the Maxwell model and fractional derivative Kevin model,and comparative analysis of the fitting results.It is showed that the fractional parameter a represents the memory role of the materials,fractional de-rivative Burgers model can describe quantitatively the nonlinear of dynamic creep property and analyze high-temperature property for asphalt mixtures.