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浙江大学学报(工学版)
J4  2013, Vol. 47 Issue (6): 1063-1071    DOI: 10.3785/j.issn.1008-973X.2013.06.019
土木工程     
波纹表面月牙形悬挑屋盖风荷载特性
罗尧治, 丁慧
浙江大学 空间结构研究中心,浙江 杭州310058
Wind load characteristics of crescent-shaped cantilevered roof with wavy surface
LUO Yao-zhi, DING Hui
Space Structure Research Centre, Zhejiang University, Hangzhou 310058, China
 全文: PDF 
摘要：

为了研究某体育场波纹表面月牙形悬挑屋盖的风荷载特性以及屋盖表面波纹对风压的影响,对该结构进行风洞试验和计算流体动力学（CFD）分析.通过对风洞试验数据的统计分析,得到结构的平均风压、脉动风压、极值风压的分布规律和屋盖上下表面风压的相关性.基于波纹状模型的CFD数值模拟,研究发现屋盖波纹表面的波峰处风压明显大于相临的波谷处风压,而且大于光滑屋面相应区域的风压,所得这一规律可以推广到一般的波纹状悬挑结构.试验得到的极值风压可以换算成用于围护结构设计的阵风系数,在与现行规范进行比较后,给出针对该体型建筑围护结构设计中阵风系数取值的建议.将试验结果与已有研究成果进行了比较,并分析了波纹表面和建筑物阻挡对上下表面风压相关性的影响,发现悬挑结构的波纹状表面对上下表面的风压相关性影响较小,而建筑物阻挡对相关性影响较大.
关键词： 悬挑屋盖;  波纹表面;  风洞试验;  风压分布;  阵风系数;  表面风压相关性    
Abstract:

Wind tunnel tests were conducted on a crescent-shaped cantilevered roof with wavy surface to study the wind pressure characteristics of the structure. And computational fluid dynamics (CFD) analysis was carried out to research the influence of the wavy surface on the local wind pressure. Via statistic analysis of wind tunnel test results, the distribution rules of mean wind pressure, fluctuating wind pressure and extreme wind pressure and the correlation coefficients of wind pressures on upper and lower surfaces were obtained. The CFD simulation showed that the wind pressure of crest regions was obviously higher than that of valley regions nearby and also higher than that of smooth roof at corresponding regions. The rule obtained could be applied to common wavy cantilevered structures. The extreme wind pressure could be converted into gust factor used for building envelope design. Comparing with code, some suggestions on design of structures with similar shape were proposed. The effect of wavy surface and block on wind pressure correlation coefficients of upper and lower surfaces was analyzed. The result showed that wavy surface had little influence on the correlation, yet block of structure had significant influence on the correlation.
Key words: cantilevered roof    wavy surface    tunnel test    wind pressure distribution    gust factor    surface wind pressure correlation
出版日期: 2013-07-09
:  TU 311.3  
基金资助:

国家自然科学基金资助项目（50978227）|国家杰出青年科学基金资助项目（51025828）.
作者简介: 罗尧治（1966—）,男,教授,博导,从事大跨空间结构研究. E-mail: luoyz@zju.edu.cn
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引用本文:

罗尧治, 丁慧. 波纹表面月牙形悬挑屋盖风荷载特性[J]. J4, 2013, 47(6): 1063-1071.

LUO Yao-zhi, DING Hui. Wind load characteristics of crescent-shaped cantilevered roof with wavy surface. J4, 2013, 47(6): 1063-1071.

链接本文:

http://www.zjujournals.com/xueshu/eng/CN/10.3785/j.issn.1008-973X.2013.06.019    或    http://www.zjujournals.com/xueshu/eng/CN/Y2013/V47/I6/1063

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