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为了准确预估高温情况下桥面沥青铺装层内的温度分布状况,建立了基于热传导学的桥面铺装层有限元模型。对沥青路面不同深度下温度分布情况进行预估,并对相同气温变化下路面桥面温度场差异性进行研究。研究结果表明:桥面沥青铺装层温度分布状况与大气温度、太阳辐射变化有关,铺装层内温度最大值随深度不同分别出现在下午16:00～18:00,此时桥面铺装层温度大于路面温度2℃左右,最低温度出现在上午8:00,此时桥面铺装层温度小于路面温度3℃左右。
In order to accurately estimate the temperature distribution in the asphalt pavement layer under the high temperature, a finite element model of the bridge deck pavement based on heat conduction was established. The temperature distribution under different depths of asphalt pavement is estimated, and the difference of temperature field between pavement surface under the same temperature change is studied. The results show that the temperature distribution of asphalt pavement layer is related to the change of atmospheric temperature and solar radiation. The maximum temperature in pavement layer varies from 16:00 to 18:00 in the afternoon, Layer temperature is greater than the road surface temperature of about 2 ℃, the lowest temperature appears in the morning 8:00, at this time the deck pavement temperature is less than the road surface temperature of about 3 ℃.