基于沥青混合料动态模量试验的数学模型与移位因子分析  

Mathematical model and shift factor analysis based on dynamic modulus test

作　　者：田中亚 杨胜丰 李力 TIAN Zhong-ya;YANG Sheng-feng;LI Li(Qilu Transportation Development Group Jinan branch,Shandong Jinan 250001 China;College of Civil Engineering,Hunan Changsha 410082 China;Huarong county housing and urban-rural development bureau,Hunan Yueyang 414200 China)

机构地区：[1]齐鲁交通发展集团济南分公司,山东济南250001 [2]湖南大学土木工程学院,湖南长沙410082 [3]华容县住房和城乡建设局,湖南岳阳414200

出　　处：《山东交通科技》2020年第2期6-8,共3页

基　　金：国家自然科学基金项目资助,项目名称:梯度非均质路面结构力学行为分析及参数反演研究,项目编号:50808077;国家自然科学基金项目资助,项目名称:各向异性路面结构力学行为及其参数智能反演研究,项目编号:51278188。

摘　　要：沥青混合料动态模量主曲线的构造与数学模型和移位因子有关。沥青和沥青混合料的本构模型主曲线的构造中大部分采用WLF方程。采用Sigmoidal模型和改进的Sigmoidal模型,分别将WLF方程作为移位因子,构造了沥青混合动态模量主曲线。以AC-13为例,分析了各种模型的拟合效果。研究结果表明,模型和移位因子的选择影响沥青混合料主曲线的构造,构造主曲线过程中应该采用充分考虑数学模型和移位因子的影响,根据拟合结果综合选择数学模型和移位因子。The construction of the main curve of the dynamic modulus of asphalt mixture is related to the mathematical model and the shift factor law.In additional,WLF equation was selected to construct the master curve of constitutive model for mixtures and asphalt binders.In this study,the sigmoidal model and the improved sigmoidal model are used to construct the main curve incorporating WLF shift factors to fit the master curves of the dynamic modulus for asphalt mixture.Take AC-13 as an example,the fitting effect of various models were analysis.The results show that the selection of model and displacement factor affects the construction of the main curve of asphalt mixture.In the process of constructing the main curve,the influence of mathematical model and shift factor should be fully considered,and the models and shift factors should be selected according to the fitting results.

关 键 词：沥青混合料 动态模量 主曲线 模型 

分 类 号：U416[交通运输工程—道路与铁道工程]