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大跨度金属结构的太阳辐射非均匀温度作用常常成为结构的控制荷载之一,但GB 50009—2012《建筑结构荷载规范》中并没有给出系统详细的计算方法。针对典型金属结构,基于稳态传导平衡理论,提出了太阳短波辐射体型系数和环境长波辐射体型系数概念及其计算式,建立金属结构太阳辐射非均匀温度作用的简化计算方法,通过算例分析与数值模拟结果对比,验证了所提计算方法的合理性和可靠性。
Non-uniform temperature effects of solar radiation on long-span metallic structures are often one of the structural control loads. However, detailed calculation methods are not given in GB 50009-2012 “Code for Structural Load of Building Structures”. Aiming at the typical metal structure, based on the theory of steady state conduction, a simplified calculation method of the concept of solar shortwave radiation body factor and environmental longwave radiation body coefficient and its calculation formula are proposed, and a simplified calculation method of establishing nonuniform temperature effect of metal structure solar radiation is proposed. The numerical simulation results show that the proposed method is reasonable and reliable.