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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/94324

    Title: 人行懸索支撐橋樑氣動力行為研究
    Other Titles: Study of aerodynamic behavior of cable-supported pedestrian bridges
    Authors: 陳怡儒;Chen, I-Ru
    Contributors: 淡江大學土木工程學系碩士班
    林堉溢;Lin, Yuh-Yi
    Keywords: 人行橋;斜張橋;吊索拱橋;顫振;抖振;Pedestrian Bridge;cable-stayed bridge;Arch Bridge;Flutter;buffeting
    Date: 2013
    Issue Date: 2014-01-23 14:21:19 (UTC+8)
    Abstract: 在過去十年中,台灣以完成建造或正在施工的長跨徑人行橋梁不斷地增加。這類型的橋梁不僅僅只是為了滿足了交通運輸上的需求,還需要額外提供了娛樂、觀光以及美化環境上的功能,因此建築美學設計就成為了一項重要的環節,而斜張橋與吊索拱橋剛好滿足了這類型的需求。這篇論文的目的在於研究這些行人橋的氣動力行為反應。
    The number of long-span pedestrian bridges completed or under construction has been increasing during the past decade in Taiwan. In addition to transportation needs, capabilities of recreation and sightseeing are also required for the design of this type of bridges. Therefore, esthetics is one of dominating factors in design. To meet the needs, cable-stayed bridges and arch bridges are often used. The objective of this thesis is to study the aerodynamic behavior of these pedestrian bridges.
    For the cable-stayed bridges, a parametric analysis is performed to study the dynamic characteristics of the structures. The dynamic characteristics include natural frequencies and mode shapes of the vibration modes. The parameters studied here contain span lengths and types of towers. The main span lengths are ranged from 100 m to 200 m. Three types of towers are used: single column, A type and H type. Using the information obtained from the modal analysis, a numerical analysis is then conducted to investigate flutter wind speeds and buffeting responses of these bridges. Two types of bridge deck are studied in this analysis.
    For the arch bridges, the parameters used in the analysis include deck width and flexural rigidity of arch. The structural coupling between arch and decks in the vibration modes is studied. Then the effects of coupled vibration modes on the flutter wind speed and buffeting responses of bridge decks is discussed.
    The results show that the effects of span length and width-depth ratio of deck are significant in the aerodynamic behavior of cable-stayed bridges. The effects of tower types are negligible. For the arch bridges, the ratio of flexural rigidities between arch and bridge deck is an important factor for the aerodynamic behavior.
    Appears in Collections:[土木工程學系暨研究所] 學位論文

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