基于数值模拟方法的沥青路面车辙等效温度计算（英文）

Calculation of effective temperature for pavement rutting using numerical simulation methods

为了有效地预测沥青路面长期车辙,提出了运用数值模型计算车辙等效温度的方法.根据南京市实际气象数据模拟了沥青路面瞬态温度场,并在此基础上计算了一年中各月份气候条件下连续 24 h 的车辙发展 情况. 分析了稳态温度场下车辙深度与路面温度之间的关系,并基于车辙等效原理获得了沥青路面车辙等 效温度.结果显示：七、八月份的车辙等效温度超过 40℃,六月、九月则在30 -40 ℃之间 ,当车辙等效温度不足30℃时,车辙发展可以忽略不计.南京全年的车辙等效温度约为 38.5 ℃,基于车辙等效温度的概念, 应用长期车辙预估模型可以反映出气象状况和交通条件对于车辙的影响.

In order to predict the long-term rutting of asphalt pavement, the effective temperature for pavement rutting is calculated using the numerical simulation method. The transient temperature field of asphalt pavement was simulated based on actual meteorological data of Nanjing. 24-hour rutting development under a transient temperature field was calculated in each month. The rutting depth accumulated under the static temperature field was also estimated and the relationship between constant temperature parameters was analyzed. Then the effective temperature for pavement rutting was determined based on the rutting equivalence principle. The results show that the monthly effective temperature is above 40 t in July and August, while in June and September it ranges from 30 to 40 Rutting development can be ignored when the monthly effective temperature is less than 30 t. The yearly effective temperature for rutting in Nanjing is around 38. 5 t. The long-term rutting prediction model based on the effective temperature can reflect the influences of meteorological factors and traffic time distribution.