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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/87856

    Title: 不同矩形斷面之高層建築設計風荷載研究
    Other Titles: An investigation on design wind loads of rectangular cross-section tall buildings
    Authors: 賴子晴;Lai, Tse-Ching
    Contributors: 淡江大學土木工程學系碩士班
    鄭啟明;Cheng, Chii-Ming
    Keywords: 高層建築;順風向;橫風向;扭轉向;設計風載重;風洞實驗;Tall Building;Alongwind;Acrosswind;Torsion;design wind load;Wind tunnel test
    Date: 2013
    Issue Date: 2013-04-13 11:48:50 (UTC+8)
    Abstract: 作用於高層建築物之風荷載,主要受順風向、橫風向與扭轉向3種不同方向之風力影響。現今國內風力規範除順風向風力可依循準穩定定理與條狀定理進行合理計算,橫風向及扭轉向風力則尚須受限於使用條件之幾何形狀,依照經驗公式及圖表進行最簡化之計算,因此無法完全描述風力的複雜多樣性。
    The wind load acting on high-rise building, mainly used for alongwind, acrosswind, torsional the 3 different types of wind effects. Among the three design wind loads, only the alongwind load can be estimated analytically based on the quasi-steady theorem and strip theory. Due to the complexity of the vortex shedding phenomenon, estimation of acrosswind and torsional wind loads are depended heavily on the empirical formulae. In the current Taiwan building wind code, the acrosswind and torsional design wind loads are limited to certain building geometric shapes.
    This thesis conducted systematic wind tunnel test on tall buildings with various geometric shapes in turbulent boundry layers generated over urban, suburban and open terrains. The side ratio of building models covers L/B= 1/5、1/4、1/3、1/2.5、1/2、2/3、1/1、3/2、2/1、2.5/1、3/1、4/1、5/1 ; and the aspect ratio covers h/√BL= 3、3.5、4、4.5、5、5.5、6、6.5、7. For each bulding model, hundreds of surface pressures were measured simultaneously by high speed pressure scanner, and then the local and global wind force coefficients and various correlations were carefully investigated to gain the insights of building loads.
    Through these wind tunnel experiments and the data analysis, the necessary data for developing the design wind loads were acquired. The design wind load estimation models adopted in this thesis were developed by Tamkang University Wind Engineering Research Center over past years. These calculated design wind loas were then compared with wind tunnel measurements and Taiwan building wind code. The results show that these formulae are in good agreement with the wind tunnel measurements. In other words, these desing wind load formulae are adequate to be applied to building wind resistant design. On the other hand, the estimated design wind loads show significant differences in many cases with the current Taiwan building wind code. It can be concluded that the formulae used in this thesis can produce more accurate building design wind loads than the Taiwan building wind code.
    Appears in Collections:[土木工程學系暨研究所] 學位論文

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