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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/102473

    Title: 半圓頂型屋蓋結構物表面擾動風壓之特性探討
    Other Titles: Characteristics of wind pressure fluctuations on dome-like structures
    Authors: 蕭字廷;Hsiao, Tzu-Ting
    Contributors: 淡江大學土木工程學系碩士班
    羅元隆;Lo, Yuan-Lung
    Keywords: 半圓頂型屋蓋;擾動風壓;屋蓋曲率;雷諾數;Domed Roofs;Wind Pressure Fluctuations;Roof Curvature;Reynolds number
    Date: 2014
    Issue Date: 2015-05-04 09:56:43 (UTC+8)
    Abstract: 當體育表演與娛樂活動的興起、大量儲存空間的需求出現,能夠解決此問題的大型結構就是大跨度建築,大跨度的想法應用於橋樑結構、建築屋頂結構等,其建築擁有能以最小表面積卻能產生出最大封閉室內空間,過去建築師使用磚石建造拱頂建築,跨度多達40多公尺,如羅馬的聖彼得大教堂,為了要求能夠容納更多人進行集會活動的空間,透過提升建築材料的強度,現今許多的大跨度建築其跨度都超過200公尺以上,如日本東京巨蛋、中國北京鳥巢體育館、台北小巨蛋等。
    When the rise of sports performance and recreational activities, many requirements of storage space.we find that the Dome-like structures can able to solve this problem . The idea of Dome-like structures used in long-span bridge structure, building roof structure. Its building has a surface area with minimal able to produce the largest closed interior space.In the past time, the architects built Dome-like structures in bricks.The span could up to 40 km. Such as St. Peter''s Basilica in Rome.Now,we can get more requirements space to accommodate people activities by improve strength building materials. It’s span can up to 200km. Such as Japan Tokyo Dome, China’s Bird''s Nest Stadium in Beijing, , Taipei Arena and so on.
    Due to large span and light material properties,the distribution of the roof surface by wind pressure is very huge. Generally not recommended with a simple calculations for a given design wind load. Over the relevant literature discusses of the characteristics of the surface pressure in Dome-like structures are victorious minority. However,most of the discussion are qualitative. In this research with many different roof curvature and reynolds number for two different control parameters. Discussion on surface of the spectral characteristics. Then,we can fit coefficient C and K of the two neighboring wind pressure spectral according to the empirical formula of the Root-coherence function . Discuss the results of the fitting coefficient during from the downstream along to the trend,As the basis for calculating the wind load.
    By the fitting results, based on the roof different of curvature f/D , we can clearly observe the changes of the cross-spectral.However,the high h/D doesn’t influence on the fitting results. From the different of Reynolds number , the results are the same as the results of f/D=0.5. Based on these results, fitting certain location is not accurate enough.We need to improve the methods of the fitting Formula.
    Appears in Collections:[土木工程學系暨研究所] 學位論文

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