季冻区钢-UHPC桥面铺装结构温度与大气温度回归分析
Regression Analysis of Temperature and Atmospheric Temperature for Steel-UHPC Bridge Deck Pavement Structure in Seasonally Frozen Regions

为探究西北季冻区在冬季降温和夏季升温阶段对钢-UHPC桥面铺装结构温度与大气气温的对应关系，本文结合季冻区气候特性，首先通过专业气象软件Meteonorm，对季冻区典型气候变化规律进行分析，研究表明，夏冬两季不仅月温差大，而且日温差也较大，是发生钢桥面铺装层劣化的活跃季节；夏季风速较大为2.94 m/s，冬季风速较小为1.14 m/s，风速变化对钢桥面铺装结构温度变化是有利的；降雨量最大发生在夏季8月份，最小在冬季12月份。然后通过多功能温度箱试验对夏冬两季降温和升温阶段的大气温度与钢-UHPC桥面铺装结构温度进行回归分析，研究表明，组合结构自上而下沿厚度方向对气温有削弱作用，并拟合出了大气温度与冬季降温阶段钢-UHPC桥面铺装结构对应关系的回归方程和大气温度与夏季升温阶段钢-UHPC桥面铺装结构对应关系的回归方程，在已知大气气温条件下，通过拟合的回归方程可较好的计算和预估季冻区冬季降温和夏季升温钢-UHPC桥面铺装结构各层间的温度。
To explore the corresponding relationship between the temperature of steel UHPC bridge deck pavement structure and atmospheric temperature during the winter cooling and summer heating stages in the northwest seasonally frozen regions, this paper combines the climate characteristics of the seasonally frozen regions and first analyzes the typical climate change patterns in the seasonally frozen regions using professional meteorological software Meteonorm. The study shows that summer and winter not only have large monthly temperature differences, but also large daily temperature differences, which are active seasons for the deterioration of steel bridge deck pavement layer; In summer, the wind speed is relatively high at 2.94 m/s, while in winter, the wind speed is relatively low at 1.14 m/s. The change in wind speed is beneficial for the temperature change of the steel bridge deck pavement structure. The maximum rainfall occurs in August in summer and the minimum in December in winter. Then, through a multifunctional temperature box test, regression analysis was conducted on the atmospheric temperature during the cooling and heating stages in summer and winter and the temperature of the steel UHPC bridge deck pavement structure. The study showed that the composite structure had a weakening effect on temperature along the thickness direction from top to bottom, and a regression equation was fitted for the relationship between atmospheric temperature and the steel UHPC bridge deck pavement structure during the winter cooling stage, as well as the relationship between atmospheric temperature and the steel UHPC bridge deck pavement structure during the summer heating stage. Under known atmospheric temperature conditions, the fitted regression equation can effectively calculate and estimate the temperature between each layer of the steel UHPC bridge deck pavement structure during the winter cooling and summer heating stages in theseasonally frozen regions.