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作为一种黏弹性材料,沥青混合料力学响应特征随环境的变化而变化。为了对沥青路面响应进行力学分析,需要对其变化规律进行研究。该文以AC-16沥青混合料的动态模量室内试验数据为基础,对沥青混合料动态模量随荷载频率及试验温度的变化规律进行研究,利用Sigmoidal模型及时温等效原理拟合得到AC-16沥青混合料的动态模量主曲线和位移因子,利用WLF方程得到位移因子随试验温度变化规律的数学模型,最后给出该种沥青混合料动态模量关于试验温度和荷载频率的变化规律,以更好地模拟沥青混合料在不同的温度下随汽车速度变化,其力学响应的变化规律。
As a viscoelastic material, the mechanical response of asphalt mixture changes with the environment. In order to analyze the mechanical response of asphalt pavement, its variation rule needs to be studied. Based on the dynamic modulus laboratory test data of AC-16 asphalt mixture, the changing law of dynamic modulus of asphalt mixture with load frequency and test temperature was studied. The ACM -16 asphalt mixture dynamic modulus main curve and displacement factor, the use of WLF equation to get the displacement factor with the experimental temperature variation of the mathematical model, and finally gives the asphalt mixture dynamic modulus on the test temperature and load frequency changes , To better simulate the asphalt mixture at different temperatures with the car speed changes, the mechanical response of the law.