CAJ | 학술논문

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 Bur-gers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 Bur-gers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。
력청혼합료응변재일정온도화외하재작용하회수착시간증장이축점증가적현상칭위연변；중복가재연변실험반영료로면하재화변형적향응관계，상용우분석로면고온항차철성능。위료진실모의로면적역학상황화묘술력청혼합료적동태연변성능，대사충력청화량충력청혼합료진행동태연변실험；연구발현력청혼합료적동태연변정비선성，동시채용경전 Bur-gers모형여유 Maxwell 체화분수계 Kevin 체천련조합적분수계도수Burgers모형대력청혼합료연변곡선진행의합，병대비분석기의합결과。결과표명，분수계모형삼수a대표료재료적기억특성，분수계도수 Bur-gers모형가정량적묘술력청혼합료동태연변성능적비선성，능경호적분석기고온성능。
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.