车辙等效温度确定方法探讨

Discussion of methods for determining effective temperature of rutting

沥青混合料是一种典型的粘弹性材料,其变形对温度的变化非常敏感,因此,在车辙预估问题中,温度是最重要的参数之一．采用车辙等效原则是确定温度参数的有效途径．为此,系统地总结了目前国内外典型的车辙等效温度计算方法,分析了各种方法的优缺点,提出了一种新的计算车辙等效温度的思路．进而结合路面温度场预估模型,采用2003年上海地区平均每小时的气象数据对各种方法进行了验证,最后提出了确定车辙等效温度的合理建议,为以后沥青路面车辙预估研究及室内试验提供了参考．

Asphalt mixture is a typical visco-elastic material, which is very sensitive to temperature. So temperature is one of the most important parameters in rutting prediction. The past study indicated that the principle of equivalent rutting was a valid way to get effective temperature. Domestic and foreign methods of effective temperature for rutting are systemically summarized. What's more, the advantages and disadvantages are evaluated and a new idea is put forward. Then Shanghai hourly historical average temperature data in 2003 were used to predict pavement temperature and validate those methods. At last some rational propositions are presented to determine effective temperature. The aim is to give references to the future rutting prediction and track testing research.