弧形内凹大跨屋盖结构风荷载特性的风洞试验与数值模拟

发布时间：2018-04-19 18:19

本文选题：弧形内凹大跨屋盖 + 风洞试验　；参考：《西安建筑科技大学学报(自然科学版)》2016年05期

【摘要】：对弧形内凹大跨钢屋盖航站楼结构的风荷载特性进行了风洞试验研究,得到屋盖平均和脉动风压系数,结构分区体型系数.理论分析采用基于Reynolds时均的RNG k-ε湍流模型,通过FLUENT软件对结构在部分风向角下的三维定常风场进行了数值模拟,分别从风压系数分布、分区体型系数变化和风速矢量图等方面进行详细研究,并与风洞试验结果对比分析.结果表明:风洞试验和数值模拟结果吻合良好,两者可相互验证.屋盖结构均承受风吸力作用,气流在迎风区域分离后形成的漩涡作用将使局部产生较大的负压区.屋盖上挑檐进行开洞处理,以及在挑檐下部设置导流板,可以有效减小其所受风荷载作用.
[Abstract]:In this paper, wind tunnel test is carried out to study the wind load characteristics of the steel roof terminal structure with arc-shaped concave large span steel roof. The mean and fluctuating wind pressure coefficients of the roof and the shape coefficient of the structure are obtained.In this paper, the RNG k- 蔚 turbulence model based on Reynolds time average is used to simulate the three-dimensional steady wind field of the structure at partial wind direction by FLUENT software, and the distribution of wind pressure coefficient is obtained respectively.The variation of area shape coefficient and wind speed vector chart were studied in detail, and compared with the results of wind tunnel test.The results show that the results of wind tunnel test and numerical simulation are in good agreement with each other.The roof structure is subjected to wind suction and the vortex formed after the windward separation will result in a large negative pressure region.The roof roof roof with roof roof roof with roof roof roof can be effectively reduced by wind load as well as by setting a diversion plate in the lower part of the roof.
【作者单位】：长安大学建筑工程学院;
【基金】：陕西省工业攻关项目(2014K06-23) 陕西省青年科技新星项目(2016KJXX-51) 陕西省建设厅建设科技计划项目(2014-K14)
【分类号】：TU312.1

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