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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/87867

    Title: 等值靜力風載重於橋樑設計上的應用
    Other Titles: Application of equivalent static wind loads on bridge design
    Authors: 王彬;Wang, Ping
    Contributors: 淡江大學土木工程學系碩士班
    林堉溢;Lin, Yuh-Yi
    Keywords: 等值靜力風載重;橋樑設計;抖振;風洞實驗;Equivalent Static Wind Load;Bridge Design;buffeting;Wind tunnel test
    Date: 2013
    Issue Date: 2013-04-13 11:49:19 (UTC+8)
    Abstract: 國內已完成和正施工的懸索支撐橋樑數量日益增多,使得風載重在橋樑設計上受到工程師更多的重視。然而在設計上使用包含靜力與動力的風載重仍是一複雜且繁瑣的工作。目前國內工程實務應用僅將風洞實驗結果當成橋樑設計之檢核。然而橋樑隨跨徑增長,風載重在橋樑設計上愈趨於掌控性的角色,因此設計時應將靜、動態風載重列入載重組合。
    The number of cable-supported bridges completed or under construction has been increasing in recent years. For this type of bridges, wind loads become significant and should be considered in bridge design. However, incorporating both static and dynamic wind loads for design use is still a tedious and difficult task. In current domestic engineering practice, wind tunnel testing is used for confirmation only. Since wind loads play a more dominant role as bridge spans become longer, these loads should be taken into consideration in the design. In this thesis, an approach to generate equivalent static wind loads at the design wind speed based on the information obtained from wind tunnel testing is proposed.
    In general, the dynamic responses can be divided into two parts, namely, the background and the resonant responses. Based on the buffeting theory, the resonant part of the buffeting responses contributed by the major structural modes can be derived. The background responses can be expressed in terms of external wind load distribution or inertial load distribution. The former can be derived by using the concept of LRC, while the latter can be derived in a similar way to the resonant responses. Then using the weighting functions and peak factors, the equivalent static wind loads can be generated.
    To examine the validity of the analytical approach, the results of a simply-supported beam were calculated and compared with those in the literature. The comparison indicates that the results are in good agreements. For demonstrating the applicability of this approach, an example of a cable-stayed bridge in construction was presented. By using this approach, the equivalent static wind loads can be generated and used for design in a combination with other loads.
    Appears in Collections:[土木工程學系暨研究所] 學位論文

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