建筑结构学报2025，Vol.46Issue(12)：63-72,10.DOI:10.14006/j.jzjgxb.2025.0137
日照辐射下钢屋盖非均匀温度场理论与实测研究
Theoretical and measurement research on non-uniform temperature field of steel roof under solar radiation
摘要
Abstract
The geometry of large-span steel structures is typically complex and variable.Under solar shortwave radiation,substantial differences arise in the radiation received at different locations,resulting in a distinctly non-uniform temperature field and making the associated temperature loads difficult to evaluate.In this paper,the steel roof structure was discretized,and a theoretical computational model of thermal equilibrium was established by considering heat-exchange mechanisms including solar shortwave radiation,environmental longwave radiation,and thermal convection.The temperatures at the discrete points were obtained by solving the mathematical model and the temperature distributions of the steel roof were subsequently reconstructed from these pointwise results.The effectiveness and accuracy of the present theoretical computational model were validated through comparisons with measured temperature-field data.Numerical examples were further employed to investigate the distribution characteristics of the roof temperature field and the determination method for non-uniform temperature loads.The research results indicate that large-span steel structures exhibit pronounced in-plane non-uniformity of temperature under solar shortwave radiation,accompanied by a clear temperature-gradient distribution in the out-of-plane direction.Furthermore,the surface coating of the structure substantially influences its solar radiation absorption capacity.The selection of appropriate coatings is of great importance for the long-term maintenance of the structure.关键词
大跨度钢结构/非均匀温度场/日照辐射/热传导/热对流Key words
large-space steel structure/non-uniform temperature field/solar radiation/heat conduction/heat flux分类
建筑与水利引用本文复制引用
区彤,丘岳想,李铭,杨庆山,刘敏,兰春光,谭坚,辛志勇..日照辐射下钢屋盖非均匀温度场理论与实测研究[J].建筑结构学报,2025,46(12):63-72,10.基金项目
国家重点研发计划(2023YFC3008503),国家自然科学基金项目(51408030). （2023YFC3008503）
