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球面壳体结构是一种风敏感性大跨度屋面结构形式。该文基于这类刚性模型的风洞试验,通过高频电子压力扫描系统测量出高度不同的四种壳体的风压分布规律。考虑雷诺数效应、高跨比、风场类型三个因素,对比球面壳体结构的气动力特性,包括中央子午线上的平均风压系数分布、脉动风压系数分布以及整个球壳表面的风压特性。该文为相应球面壳体结构抗风设计中风荷载的确定提供参考。
Spherical shell structure is a wind-sensitive long-span roof structure. Based on the wind tunnel test of such rigid model, the wind pressure distribution of four shells with different heights was measured by high-frequency electronic pressure scanning system. Considering Reynolds number effect, high span ratio and wind field type, the aerodynamic characteristics of the spherical shell structure are compared, including the distribution of average wind pressure coefficient on the central meridian, the distribution of pulsating wind pressure coefficient and the wind pressure on the surface of the entire spherical shell characteristic. This paper provides a reference for the determination of the wind load of the corresponding spherical shell structure.