武汉火车站站房屋盖和雨棚风洞试验研究  

Wind tunnel study of wind loading on the roof system of Wuhan railway station

作　　者：陈凯[1] 何连华[1] 符龙彪[1] 潘国华[2] 陶勇[2] 鲍华[2] 郭盛[2] 石城林[2] 

机构地区：[1]中国建筑科学研究院,北京100013 [2]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《建筑结构》2009年第1期16-19,15,共5页Building Structure

摘　　要：通过风洞试验研究了武汉火车站屋盖和雨棚的表面风荷载分布特征,着重分析了大型悬挑和镂空吊顶对风压分布的影响。屋盖的大型悬挑对局部风压影响很大,当来流斜吹时,悬挑局部区域的体型系数可达-2.2,而由于玻璃幕墙的阻挡作用,悬挑下方在某些风向会产生0.6的正压体型系数。下表面镂空时的上表面内侧风压和密闭时的下表面风压基本一致。在整体设计时,可按封闭模型的试验结果进行取值。通过对总受力和压力方差的统计分析,获得了不同风向下结构受风力作用的大小和离散程度,可为评估不利风向角提供重要参考依据。A wind tunnel test was carried out to investigate the wind loading on the roof system of Wuhan railway station, especially focusing on the effects of the large suspended roof and the permeability ceiling. The suspended roof significantly affected the local wind pressure. The shape factor of - 2.2 was found on the large suspended roof when the wind direction was inclined to the roof edge and the shape factor of 0.6 appeared at certain wind direction because of the blocking effect of the glass facade. Tbe inner pressure of the upside roof with permeability ceiling was approximately equal to the outer pressure of the underside roof with impermeability ceiling. The results obtained with impermeability ceiling can be directly referenced for the structural design of wind loading. A statistics analysis of wind pressure was carried out to reveal the strength and dispersion of the wind force and the unfavorable wind direction was found accordingly.

关 键 词：大跨度空间结构 风洞试验 悬挑 镂空结构 不利风向角 

分 类 号：TU248.1[建筑科学—建筑设计及理论] V211.74[航空宇航科学与技术—航空宇航推进理论与工程]