摘要
为了研究玻璃幕墙在强风作用下破坏机理,通过刚性模型风洞测压试验,研究了B类地貌,典型风向角下,4%开洞率的CAARC模型在不同开洞位置时,洞口位置测点的风压系数功率谱特性、内外风压系数时程以及脉动风压系数的相关性。结果表明:开洞瞬间,洞口腔体内部测点的风压系数时程会产生显著突变;迎风面上测点的风压系数功率谱在开洞瞬间和开洞后折减频率0.7Hz附近出现峰值;腔体内部测点和迎风面测点的风压系数相关性较高,侧风面和背风面测点的风压系数相关性相对较小。研究的模型瞬态开洞的风压特性可以更好地理解高层建筑在极端风载荷下的风致反应特性,同时也可以为结构的抗风设计提供参考。
Through the rigid model wind tunnel test,the time history of the internal and external wind pressure coefficient,the power spectrum characteristics of the wind pressure coefficient and the correlation of the RMS wind pressure coefficient at the measuring taps of the opening position of CAARC model with 4%opening rate at different opening positions were investigated in suburban terrain and under the typical wind direction.The results show that the time history of the wind pressure coefficient of the measuring taps inside the opening has significant mutation at the moment of opening.At the moment and after the opening,the peak value of the reduction frequency of the power spectrum of the wind pressure coefficient appears near 0.7Hz on the windward.The correlation between the wind pressure coefficients of the measurement taps inside the opening and the windward side is high,while the correlation between the wind pressure coefficients of the side ward and the leeward is relatively smaller.
作者
李毅
张焰
尹婕婷
LI Yi;ZHANG Yan;YIN Jieting(Hunan Provincial Key Laboratory of Structures for Wind Resistance and Vibration Control,Hunan University of Science and Technology,Xiangtan,411201 China;School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《建筑结构》
北大核心
2023年第S01期115-124,共10页
Building Structure
关键词
高层建筑
风洞试验
瞬态开洞
功率谱
相关系数
high-rise building
wind tunnel test
sudden opening
power spectrum
correlation
