基于气象参数的混凝土结构日照温度作用分析

Analysis of solar temperature action for concrete structure based on meteorological parameters

气象参数是分析日照环境下混凝土结构温度作用的关键参数之一。影响日照环境下混凝土结构温度场的气象参数主要有太阳辐射、气温和风速。本文分析了这些气象参数变化的一般规律,提出其时程分析模型,并从概率统计的角度分析了这些参数的分布规律,确定了具有一定重现期的气象参数代表值。最后以一个混凝土箱梁为例,利用这些气象参数代表值计算分析了其日照温度场,并根据计算温度场拟合得到竖向温差分布曲线。计算表明,分析日照环境下混凝土结构温度场时应考虑气象参数的随机分布。

Meteorological parameters are of key importance for analysis of solar temperature action on concrete structures. The main meteorological parameters affecting the solar temperature field of concrete structures are solar radiation, air temperature and wind speed. These meteorological parameters and their random variation patterns are analyzed. The probability distributions of these meteorological parameters are investigated, and typical values of the meteorological parameter for a given return period are presented. Taking a concrete box girder as an example, the temperature field is analyzed with the meteorological parameter typical values and the fitting curve of vertical temperature difference is given on the basis of the calculated temperature field. The results show that the meteorological parameter probability distribution should be considered for the solar temperature field analysis of concrete structures.