Abstract This paper presents wind pressure distribution characteristics of oval-shaped arch-supported membrane structures based on the wind tunnel experiments. Distribution of mean and fluctuating wind pressure coefficient is presented meticulously using pressure maps. Influence of different factors including rise-span ratio, wind direction, and terrain category, on the distribution of mean, fluctuating and peak wind pressure coefficient is discussed. Both enclosed and open structures are considered. Results show that structure experiences critical suction pressure at immediate downslope of arch axis under oblique wind direction. The significant influence of rise-span ratio and wind direction on the distribution of mean and peak wind pressure coefficient is observed. Variations of wind pressure coefficient, due to change in key parameters, are distinct in windward area but changes are insignificant in leeward area. Relatively larger area of roof of open structure is loaded with positive wind pressure coefficient, as compared to an enclosed roof. Moreover, clustering analysis is performed to divide the roof surface into different zones, then mean and peak wind pressure coefficient are proposed for corresponding zones of roof surface considering different rise-span ratios under different wind directions. The outcomes are expected to be useful to engineers and researchers to understand similar type of structures.

中文翻译：

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椭圆形拱支膜结构风洞试验研究

摘要 本文基于风洞试验研究了椭圆形拱支膜结构的风压分布特性。使用压力图精心呈现平均风压系数和波动风压系数的分布。讨论了升跨比、风向和地形类别等不同因素对平均、波动和峰值风压系数分布的影响。封闭式和开放式结构都被考虑。结果表明，在斜风向作用下，结构在拱轴直接下坡处承受临界吸力。观察到了立跨比和风向对平均风压系数和峰值风压系数分布的显着影响。风压系数的变化，由于关键参数的变化，迎风区变化明显，背风区变化不大。与封闭式屋顶相比，开放式结构屋顶的正风压系数加载面积相对较大。此外，通过聚类分析将屋顶表面划分为不同的区域，然后在不同风向下考虑不同的上升跨比，针对屋顶表面的相应区域提出平均风压系数和峰值风压系数。预计结果将有助于工程师和研究人员了解类似类型的结构。通过聚类分析将屋顶表面划分为不同的区域，然后在不同风向下考虑不同的立跨比，对屋顶表面的相应区域提出平均风压系数和峰值风压系数。预计结果将有助于工程师和研究人员了解类似类型的结构。通过聚类分析将屋顶表面划分为不同的区域，然后在不同风向下考虑不同的立跨比，对屋顶表面的相应区域提出平均风压系数和峰值风压系数。预计结果将有助于工程师和研究人员了解类似类型的结构。