Wind effects of horizontal beam at the top of high-rise buildings
Liu Mu-guang Xie Zhuang-ning Shi Bi-qing
School of Civil Engineering and Transportation, State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510641, China
Abstract:The characteristics of aerodynamic force and wind load of horizontal beam located tall building top are discussed by numerical simulation and wind tunnel experiments. The results of numerical simulation show that wind attack angle of horizontal beam increase significantly due to the effect of flow around the building top. The horizontal beam is confirmed as galloping stability with the aerodynamic force of beam obtained from numerical simulation and wind tunnel tests. The wind-induced response analysis for beam reveals that its peak lift is greater than the peak drag. The analysis of power spectral density function of general force and the influence of frequency ratio on peak lift are further conducted, which implies that the horizontal beam is prone to vortex-induced resonance under the wind of 50 year return period.
刘慕广, 谢壮宁, 石碧青. 高层建筑顶部横梁的风效应[J]. 振动与冲击, 2016, 35(5): 103-107.
Liu Mu-guang Xie Zhuang-ning Shi Bi-qing. Wind effects of horizontal beam at the top of high-rise buildings. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(5): 103-107.
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