沥青路面高温温度场数值分析与试验验证

利用气象资料预估夏季高温季节沥青路面结构内温度场的分布状况，有助于合理地设计沥青路面结构，在不同结构层使用合适的沥青等级，以防止路面出现过量的车辙。根据传热学基本理论，分析了沥青路面在夏季高温季节的热能传导方式，建立了沥青路面显式格式二维非稳态温度场数值分析模型，并实现了基于有限差分的数值求解。为了解不同地域和气候条件对沥青路面高温温度场的影响，进行了温度场现场试验验证。试验观测结果与数值分析结果的对比，证明了本文数值计算模型的合理性和正确性。

Numerical analysis and experimental validation of high temperature fields in asphalt pavements

To prevent excessive rutting on asphalt pavements, it is necessary to predict correctly the high temperature fields in asphalt pavements with the climate information, to design adequately the pavement structures and to choose correctly the grades of asphalt binder. Based on the elementary theory in thermology, the patterns of heat exchange on asphalt pavements were analyzed in detail during summer seasons; and the two-dimensional numerical model of transient temperature fields in asphalt pavements was established with explicit scheme, which is deduced with the finite difference method. In order to understand the preliminary effects of different locations and climates on high temperature fields in asphalt pavements, the in-site experimental validations were carried out. Meanwhile, the comparison between results of prediction model and the in-site data proofs the validation of numerical model.