摘要
采用同步测压技术,进行国家网球中心新馆刚性模型风洞试验,对其可开合屋盖的风荷载特征进行研究。结果表明:可开合屋盖风荷载的作用机制不仅与来流风特性有关,还显著受到特征湍流的影响。屋盖的开启状态和表面形状是影响风压分布的主要因素;虽然来流风速近似满足高斯分布,但是作用于大跨屋盖表面的脉动风荷载并不满足高斯分布。屋盖的开启状态对脉动风荷载的功率谱和根方差影响很大,屋盖开启后,孔洞周围脉动风荷载功率谱将存在一个较为明显的谱峰,脉动风荷载的根方差增大。
High-Frequency-Pressure-Integration tests were carried out in a wind tunnel to investigate wind load characteristics of the retractable roof using rigid model of New National Tennis Center.The results show that:wind load of the retractable roof is not only related to the oncoming flow characteristics,but also mostly to the signature turbulence which induced by the roof itself.The roof configurations in opening or closing,and the surface shape are the most important factors for wind pressure distribution.From the point of view of statistics,fluctuation wind load of the retractable roof exhibit clear non-Gaussian feature.Power spectra and RMS of the fluctuation wind load depends on the state of the retractable roof,when the retractable roof is in opening,power spectra will has a peak value and RMS increases.
出处
《土木工程学报》
EI
CSCD
北大核心
2010年第S2期112-118,共7页
China Civil Engineering Journal
基金
国家自然科学基金青年基金(50808014)
国家自然科学基金杰出青年基金(56237845)
关键词
可开启屋盖
风荷载
风洞试验
概率分布
功率谱
retractable roof
wind load
wind tunnel test
probability distribution
power spectrum
