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为了揭示桥面铺装温度场的分布特性并建立预估模型,测试道路和桥面沥青铺装的温度场并进行对比分析。在夏季高温期和冬季低温期实测温度场,收集或计算气温、风速、湿度和太阳辐射等气象要素,对比分析实测温度场,揭示桥面铺装温度场的分布特性;采用统计分析方法,建立桥面铺装夏季日最高温度和冬季日最低温度的预估模型。研究结果表明:桥面铺装温度与气温几乎呈同步周期性变化;与道路铺装相比,桥面铺装的夏季日最高温度高1.4℃(3cm处)、日温差大2.2℃;路表、距路表3cm和7cm处的冬季日最低温度分别高3.3℃、1.8℃和0.9℃,冬季日温差分别小2.0℃、2.2℃和2.1℃;建立了以气温、太阳辐射、风速与湿度为变量的桥面铺装夏季日最高温度和冬季日最低温度预估模型,与LTPP和SHRP模型相比,该模型在预估桥面铺装温度场时具有更好的精度。
In order to reveal the distribution characteristics of the temperature field of deck pavement and to establish the predictive model, the temperature field of asphalt pavement of road and deck is tested and compared. In the high temperature in summer and low temperature in winter, the measured temperature field is collected or calculated as meteorological factors such as temperature, wind speed, humidity and solar radiation. The measured temperature field is compared and analyzed to reveal the distribution characteristics of the temperature field of bridge deck pavement. The statistical analysis method is used to establish Estimation models of summer maximum temperature and winter minimum temperature of bridge deck. The results show that the deck pavement temperature changes almost synchronously with air temperature. Compared with road pavement, the highest day temperature of pavement deck is 1.4 ℃ (3cm) and the daily temperature difference is 2.2 ℃. Respectively. The minimum daily temperatures at 3 cm and 7 cm away from the road were 3.3 ℃, 1.8 ℃ and 0.9 ℃, respectively. The daily temperature differences in winter were 2.0 ℃, 2.2 ℃ and 2.1 ℃, respectively. Temperature, solar radiation, wind speed and humidity Variables of bridge deck pavement summer day maximum temperature and winter day minimum temperature prediction model, compared with the LTPP and SHRP models, the model has better accuracy in predicting the deck pavement temperature field.