大高寬比高層建筑風效應試驗研究
李想1, 徐其功1,2, 許偉1,3
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(1 華南理工大學土木與交通學院，廣州 510640；2 廣東省建科建筑設計院，廣州 510502；3 廣東省建筑科學研究院，廣州 510502）
［摘要］以一棟大高寬比高層建筑為背景，通過多點同步測壓風洞試驗，結合時域和頻域分析方法對其進行風效應分析。首先計算了慣性力法得到的各層等效靜風荷載和風荷載時程分別作用下結構的位移響應，并分析了典型風向的結構響應特性；同時以330°風向角下的風洞試驗時程數(shù)據(jù)為基礎，進行了氣動力功率譜密度分析；最后分析了阻尼比參數(shù)的選取對結構風致響應的影響。結果顯示：對于該高層建筑的風致響應計算，僅考慮基階振型的貢獻可以近似滿足工程精度要求；加速度計算對應的橫風向廣義力與位移計算的相比較大，但數(shù)值表現(xiàn)均不明顯。最后給出了結構阻尼比與控制性風向風致響應的定量關系。［關鍵詞］高層建筑; 風洞試驗; 風致響應; 功率譜; 風荷載中圖分類號：TU312+.1，TU973 文獻標識碼：A 文章編號：1002-848X(2015)13-0073-06
Experimental study on wind effects of tall building with large height-width ratioLi Xiang1, Xu Qigong1,2, Xu Wei1,3(1 Civil and Transportation Engineering, South China University of Technology, Guangzhou 510640, China; 2 Jianke Architectural Design Institute of Guangdong Province, Guangzhou 510502, China; 3 Guangdong Provincial Academy of Building Research, Guangzhou 510502, China)Abstract: Taking a tall building with large height-width ratio as the background, wind effect analysis was carried out through the wind tunnel test of multi-point synchronous pressure measurement, combined with time domain and frequency domain analyses methods. First structural displacement responses were calculated under the actions of equivalent static wind load of each layer and wind load that calculating respectively by using the inertia force method. The structural response characteristics in the typical wind direction were analyzed. Based on wind tunnel test time-history data at 330°wind angle, aerodynamic power spectral density analysis was carried out. Finally the influence of damping ratio parameter on the wind-induced response was studied. The results show that for the wind-induced response calculation of the tall building, it's approximated to meet the precision requirements of the engineering considering only the contribution of the fundamental mode. Across wind generalized force corresponding to the acceleration calculation is large compared to the displacement calculation, but the numerical performance is not obvious. Finally, the quantitative relation between the damping ratio and wind-induced response with controlled wind direction was given.Keywords:tall building; wind tunnel test; wind-induced response; power spectral density; wind load
作者簡介：李想，碩士研究生，Email：951047626@qq.com。
