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    題名: An aeroelastic phenomenon induced by lateral -torsional coupling
    作者: 鄭啟明;Cheng, Chii-ming; Lu, Po-Chien ; Tsai, Mun-Wei
    貢獻者: 淡江大學土木工程學系;淡江大學水資源及環境工程學系
    關鍵詞: 高層建築;側扭轉耦合;動態行為;風洞氣彈力試驗;Highrise Building;Lateral Torsional Coupling;Dynamic Behavior;Wind Tunnel Aeroelastic Test
    日期: 1998-01
    上傳時間: 2010-01-11 10:45:15 (UTC+8)
    摘要: When mass center separates from elastic center, high-rise buildings exhibit lateral and torsional coupled vibration modes. This research work was designed to exam this structural coupling induced dynamic behavior through wind tunnel aeroelastic test. Results show that, when the torsion/lateral frequency ratio close to 1.0, building's acrosswind response would unexpectedly decrease. Data analysis also indicates that, at critical wind speed, acrosswind response and vortex shedding process exhibit strong correlation when frequencies are well separated. As frequency ratio drawing close with presence of x-axis eccentricity, correlation between response and vortex shedding will drop substantially. Velocity measurement taken in the wake region also indicates that, when frequency ratio approaches 1, vortex shedding intensity is weakened significantly.
    關聯: 第六屆東亞太平洋結構工程與營建會議研討會論文集第三冊=Proceedings of the Sixth East Asia-Pacific Conference on Structural Engineering & Construction: Tradition, Present, and Future Volume 3, pp.2269-2274
    顯示於類別:[美國研究所] 視聽著作
    [土木工程學系暨研究所] 會議論文

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