摘要
在完成武汉国际证券大厦表面风压风洞试验的基础上,进行该超高层建筑在内陆良态风作用下表面风压与顶部风速的现场实测,对比分析两种方法所测得的平均风压系数、均方根风压系数、风压谱、相干函数的差异。结果表明:无量纲化实测风速谱和Karman风速谱比较一致;平均风压系数风洞试验结果和实测结果分布规律基本一致,尤其是迎风面平均风压系数风洞试验结果和实测结果吻合较好;而均方根风压系数实测结果比风洞试验结果明显偏大;风洞试验风速谱较实测风速谱的能量分布偏向于高频段,风洞试验风压谱较实测风压谱能量分布范围更宽、且高频段能量占优;风洞试验各测点相干性整体上大于相应实测测点的相干性,且在高频段差异更为明显。
After completing the wind tunnel test for wind pressure measurement of Wuhan International Stock Building model,field measurement of the wind pressure on the super high-rise building surface and wind speed at its roof under inland normal climate was conducted.The mean wind pressure coefficients,root-mean-square( RMS) wind pressure coefficients,wind pressure spectra as well as coherence functions were discussed based on the test and field measurement results.It is found that the mean wind pressure coefficients obtained from the wind tunnel test approximately agree with those obtained from the field measurement,especially,the mean wind pressure coefficients on the windward side obtained from the wind tunnel test agree very well with those obtained from the field measurement.The RMS wind pressure coefficients obtained from the wind tunnel test are significantly smaller than those obtained from the field measurement.The in-situ wind speed spectrum is rather consistent with the von Karman spectrum.Compared with the in-situ wind pressure spectrum,the wind pressure spectrum from the wind tunnel data shows a wider distribution of energy and tends to have more energy in the high frequency range.In addition,the coherences of the measuring points obtained from the wind tunnel test are larger than those of the corresponding points obtained from the field measurement,which are more notable in the high frequency range.
出处
《土木工程学报》
EI
CSCD
北大核心
2015年第5期35-43,共9页
China Civil Engineering Journal
基金
国家自然科学基金(90715023)
关键词
超高层建筑
现场实测
风洞试验
风压特性
良态风
super high-rise building
field measurement
wind tunnel test
wind pressure
inland normal climate
