淡江大學機構典藏:Item 987654321/116017
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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/116017


    Title: Approximation of fluctuating pressure cross spectra of dome-like roofs under turbulent flow
    Authors: Lo, Yuan-Lung;Lin, Hsiang-Ling
    Keywords: Hemispherical dome;wind tunnel test;pressure cross-spectrum
    Date: 2018-11-05
    Issue Date: 2019-03-16 12:12:01 (UTC+8)
    Abstract: Large span roof structures have been widely adopted for their good performance in multiple functionalities and innovative designs. However, because of their light weight, wind-resistant design is more urgent than earthquake-resistant design. And further, their long span geometry often results in a weak spatial correlation in pressure distributions and hence makes the estimation of wind loads a difficult task. Spectrum characteristics of wind pressures have been mentioned in several publications; however, there is still little discussion of cross-spectrum characteristics. In this paper, cross-spectra of fluctuating wind pressures on various dome-like roofs are investigated under a suburban terrain flow. By examining separately the root-coherence function and the phase function, approximation models of both functions are proposed in terms of the rise/span ratio based on certain simple but efficient assumptions. Once the two functions are simulated in good agreement with experimental results, the cross-spectra, or the co-coherence function, can be simulated by simply combining the root-coherence function and the phase function.
    Relation: Journal of the Chinese Institute of Engineers 41(7), p.579-589
    DOI: 10.1080/02533839.2018.1530953
    Appears in Collections:[Graduate Institute & Department of Civil Engineering] Journal Article

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