English  |  正體中文  |  简体中文  |  Items with full text/Total items : 51756/86971 (60%)
Visitors : 8357213      Online Users : 94
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/87859

    Title: 對於不同幾何建築物在干擾效應下之設計風載重的影響
    Other Titles: The interference effects on the design wind loadsof different buildings
    Authors: 杜富元;Du, Fu-Yuan
    Contributors: 淡江大學土木工程學系碩士班
    Keywords: 高層建築;風洞試驗;干擾效應;設計風載重;high-rise building;wind tunnel;interference effect;design wind load
    Date: 2012
    Issue Date: 2013-04-13 11:48:58 (UTC+8)
    Abstract: 在高樓林立的現代都市裡,大樓的密度升高不少,以往將低矮房屋改建成大樓時並不需要考慮其他建築物對於自身的影響,但隨著高樓密度提高,很多大樓已經是並排在一起,甚至更有不少棟連在一起或是相鄰附近。故遮蔽效應之影響不能小覷。
    由本文實驗結果得知,干擾建物高度與寬度不同時,對於下游主要建物的風力會產生不同的影響。在 X/B=3,Y/B=0的位置時,可觀察到,改變高度對於平均風力的影響較改變寬度影響來的小。
    In the modern city, tall buildings are usually built in cluster. The interference effect caused by the adjacent tall buildings that may significantly increase the wind loads becomes an important factor to be taken into consideration during building design. This research conducted systematic wind tunnel tests to investigate the interference effect of two adjacent tall buildings with various separations and geometric shapes.
    The initial part of this thesis investigates the effect of building volume on the interference coefficient. The results indicate that the variation of building volume caused by change of cross-sectional depth has little effect on the interference phenomenon. Based on this finding, only the height ratio and breadth ratio were used as the geometric parameters in the subsequent wind tunnel studies.
    Then this thesis study the interference effect on principal buildings with aspect ratio H/√A=6 and side ratio D/B=1/3, 1/2, 2/1, 3/1, in turbulent boundary layers developed over urban, suburban and open country terrain categories. Whereas the interfering building has the various height ratios and breadth ratios with respect to the principal building. Wind loads acting on the principal building under the influence of the adjacent inferring building were measured and converted to interference coefficients by normalization with respect to the corresponding wind loads of an isolated building.
    The results indicate that change of building height and width of the interfering building will cast different level of effect on the principal building. Generally speaking, breadth of the interfering building causes more interference effects than the building height. Under interference, the mean alongwind load tends to decrease due to the shielding of the upstream interfering building. However, the fluctuating wind loads, especially the acrosswind load, tend to increase due to the presence of the adjacent interfering building for the most cases. As for the building design wind loads, building in open country is subjected to the strongest inference effect, and building in urban terrain the least.
    Appears in Collections:[土木工程學系暨研究所] 學位論文

    Files in This Item:

    File SizeFormat

    All items in 機構典藏 are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback