不同外部平台宽度对大跨建筑屋盖风荷载的影响

发布时间：2018-04-15 04:23

本文选题：大跨建筑 + 外部平台　；参考：《湖南大学学报(自然科学版)》2016年11期

【摘要】：为了研究外部平台宽度对大跨屋盖风荷载的影响,在B类地貌中对无平台和5个典型平台宽度下的刚性模型进行风洞测压试验,得到了各工况下的屋盖表面平均风压系数和脉动风压系数.研究表明:外部平台增大了大跨结构屋盖的平均风荷载.随着平台宽度的增大,屋盖的平均风荷载先增大后减小.平台宽度12m时最不利,其最大增幅达到33%.平台宽度20m时增幅达到20%;外部平台增大了大跨结构屋盖的脉动风荷载,平台宽度12m时最不利,其增幅达到11%.平台宽度20m时,增幅为8%,其余平台宽度下的增幅基本在5%以内.屋盖背风面边缘的脉动风荷载随着平台宽度的增加而减小,平台宽度20m时可达19%.
[Abstract]:In order to study the influence of the width of external platform on the wind load of large span roof, the wind tunnel pressure measurement tests were carried out on rigid models with no platform and five typical platform widths in class B landforms.The average wind pressure coefficient and pulsating wind pressure coefficient of roof surface are obtained under various working conditions.The results show that the external platform increases the average wind load of long span roof.With the increase of platform width, the average wind load of roof first increases and then decreases.When the width of the platform is 12m, the maximum increase of the platform is 33m.The external platform increases the fluctuating wind load on the roof of the long-span structure, and the most disadvantageous is when the width of the platform is 12m, the increase is 11.1%.When the width of platform is 20 m, the increase is 8%, and the increase of other platform width is within 5%.The pulsating wind load at the edge of the roof leeward decreases with the increase of the platform width, and can reach 19m when the platform width is 20m.
【作者单位】：湖南大学建筑安全与节能教育部重点实验室;
【基金】：国家自然科学基金资助项目(51278190,51178180,51478179)~~
【分类号】：TU312.1

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