基于混凝土浇筑仓表面实测温度分布的太阳辐射热反馈

The Solar Radiant Heat Feedback Based on the Measured Temperature Distribution of Concrete Placement Surface

混凝土建筑物的温度场受太阳辐射热的影响很大,但基于混凝土建筑物现场实测温度进行太阳辐射热反馈较少。结合西南某建设中的混凝土坝工程,实时在线监测高温季节浇筑仓表面受环境气温和太阳辐射热的影响,通过建立浇筑仓表面小尺度温度统计模型,分离出环境温度分量,进而基于环境温度分量反馈了监测期间的太阳辐射热。分析表明,在高温季节,太阳辐射热对混凝土浇筑仓温度影响很大,能使该大坝混凝土浇筑仓周围空气日平均温度增量达到11℃以上,周围空气温度增量峰值达到30℃左右。

Solar radiant heat has a great impact on temperature field of concrete structure, however, there are less studies about solar radiant heat feedback based on field measured temperature. Combined with a southwestern concrete dam under construction, monitoring the influence that ambient temperature and solar radiant heat have on placement in high temperature season, real-timely and on-linely, this paper separates the environmental temperature component by building small-scale temperature statistical model of placement, then gets the solar radiant heat feedback during the monitoring. The analysis shows that, in high temperature season, solar radiant heat has a great impact on the temperature of concrete placement, under the solar radiant heat, the increment of daily mean air temperature around concrete placement is higher than 11 ℃, the temperature incremental peak of ambient air reaches to about 30℃.