淡江大學機構典藏:Item 987654321/110525
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    题名: Simultaneous Measurement of Wind Pressures and Displacements on Tall Building
    作者: Kim, Yong Chul;Lo, Yuan-Lung;Yoon, Sung-Won
    关键词: Unsteady aerodynamic force;Instability vibration;Tall building;Free vibration method
    日期: 2017-03-01
    上传时间: 2017-07-18 02:10:26 (UTC+8)
    出版者: Korean Association for Spatial Structures
    摘要: Vortex-induced vibration and instability vibration of tall buildings are very important fluid-structure interaction phenomenon, and many fundamental questions concerning the influence of body movement on the unsteady aerodynamic force remain unanswered. For tall buildings, there are two experimental methods to investigate the characteristics of unsteady aerodynamic forces, one is forced vibration method and the other is free vibration method. In the present paper, a free vibration method was used to investigate the unsteady aerodynamic force on tall building whose aspect ratio is 9 under boundary layer simulating city area. Wind pressures on surfaces and tip displacements were measured simultaneously, and the characteristics of tip displacements and generalized forces were discussed. It was found that variation of across-wind displacements showed different trend between the case when wind speed increases and wind speed decreases, and the fluctuating generalize forces in across-wind direction of vibrating model are larger than that of static model near the resonant wind speed and approach to the static value. And for higher wind speed range, there were two peaks in across-wind power spectra of generalize forces of vibrating model, which means that two frequency components are predominant in unsteady aerodynamic forces.
    關聯: Journal of Korean Association for Spatial Structures 17(1), p.77-84
    DOI: 10.9712/KASS.2017.17.1.077
    显示于类别:[土木工程學系暨研究所] 期刊論文

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