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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/34584

    Title: 調頻液柱阻尼器於受風結構扭轉向之行為探討
    Other Titles: Investigation of tuned liquid column dampers (TLCD) in wind-induced torsional motion
    Authors: 廖珮亘;Liao, Pei-hsuan
    Contributors: 淡江大學土木工程學系碩士班
    吳重成;Wu, Jong-cheng
    Keywords: 調頻液柱阻尼器;水頭損失係數;扭轉向運動;互制行為;Tuned Liquid Column Damper;Head Loss Coefficient;Torsional Motion;Interaction
    Date: 2007
    Issue Date: 2010-01-11 05:24:14 (UTC+8)
    Abstract: 近代橋梁跨度增大,且使用質量較輕之建材,其受風作用之反應亦隨之增加,因此增設減振裝置如調頻液柱阻尼器(Tuned Liquid Column Damper, TLCD)來抑制結構扭轉向振動有其必要性。目前TLCD之應用大多集中於建築物,甚少有橋梁上之應用。因此本文之研究內容將針對結構裝設變斷面TLCD進行基本理論推導,並進行TLCD系統識別以及二自由度系統互制行為之驗證實驗。
    Recently, the advancement in construction technology and material has facilitated the construction of lighter bridges with even longer span. The down side effect that comes with it is the susceptibility of such structures to wind loading. Thus, the use of vibration control device, such as tuned liquid column damper (TLCD), is becoming more and more necessary. Since the application of TLCD to civil structures is mostly on buildings, the derivation of the interaction behavior between the TLCD and structure in the torsional motion will have to be addressed.
    In this research, a single-degree-of-freedom damped structure equipped with a TLCD in torsional motion is considered to derive the equations of motion. Consequently, the analytical solution of the structural response and TLCD liquid motion has been derived under the excitation of harmonic loading. It was found that, in the equations of motion, there exists a modified term which is not considered in the existent literature. To justify the importance of this term, a large scale structure and TLCD models were constructed and the verification of interaction tests was conducted. Prior to the interaction tests, the properties of the TLCD and structures were also identified respectively and the values obtained were used to compute the analytical solutions from the interaction equations for comparison.
    The identification results show that natural frequencies of TLCDs are quite close to the theoretical values with error less than 5%, and the head loss coefficients increase with the increase of the blocking ratio and cross-section ratio. On the other hand, the interaction tests show that experimental results are closer to the analytical solution with the modified term considered than without the modified term considered. Therefore, the incorporation of the modified term in the interaction equations of motion is essential.
    Appears in Collections:[Graduate Institute & Department of Civil Engineering] Thesis

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