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基于弹性层状体系的沥青混凝土路面温度场模型具有较强的适应性,不受地区及路面结构类型的限制。采用理论分析法,从热力学传热过程原理出发,考虑大气能量传递的导热、对流换热、辐射传热的方式,建立周期非稳态热传导方程用于路面的温度场分析。在研究了太阳辐射和大气温度等影响因素的基础上,推导出适用于沥青混凝土路面温度场的公式。同时建立了有限元温度场模型,与层状体系温度场模型及Superpave温度场模型进行对比分析。研究结果表明,层状体系温度场分析结果与Superpave温度场模型、有限元温度场模型的偏差较小,且数值往往介于Superpave的结果和有限元分析结果之间。
The asphalt pavement temperature field model based on the elastic layered system has strong adaptability and is not limited by the type of the area and pavement structure. Based on the principle of thermodynamic heat transfer process, a theoretical analysis method was used to analyze the temperature field of the pavement by considering the heat transfer, convection heat transfer and radiative heat transfer of atmospheric energy transfer. Based on the study of influencing factors such as solar radiation and atmospheric temperature, the formula of temperature field suitable for asphalt concrete pavement is deduced. At the same time, the finite element temperature field model is established, which is compared with the temperature field model and Superpave temperature field model of layered system. The results show that the temperature field analysis results of the layered system have little deviation from that of the Superpave temperature field and the finite element temperature field model, and the numerical results often fall between Superpave’s results and the finite element analysis results.