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某大跨平屋蓋表面風荷載特性研究*
秦樂, 田玉基
摘 要

(北京交通大學土木建筑工程學院,北京 100044)
[摘要]通過風洞模擬試驗,研究了在錐形渦誘導下大跨平屋蓋表面風荷載的特性。給出了風向角、風速、屋蓋厚度、場地條件對風荷載的影響,進而分析了產(chǎn)生這樣結(jié)果的原因和流動機理,并把斜度和峰態(tài)作為區(qū)分高斯區(qū)和非高斯區(qū)的標準。另外采用功率譜從頻域角度對風荷載進行分析。
[關(guān)鍵詞]大跨屋蓋;錐形渦;風荷載;非高斯;功率譜
中圖分類號:TU351文獻標識碼:A文章編號:1002-848X(2012)02-0160-05
Research on wind load on a large-span plane roof
Qin Le,Tian Yuji(School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)
Abstract:By means of wind tunnel simulation, the wind loading on the roof of large-span plane roof induced by conical vortex was investigated. The pressure distributions on the roof of the model were obtained under different wind direction, wind speed, thickness of the roof, surface roughness, and the mechanism of the flow was analyzed, using skew and kurtosis as a distinction between Gaussian and non-Gaussian zone district standards. The power spectrum was applied to analyze wind distribution from the view of frequency domain.
Keywords:large-span roof; conical vortex; wind load; non-Gaussian; power spectrum
*國家自然科學基金“大跨屋蓋結(jié)構(gòu)的風致關(guān)鍵效應與動力災變行為”(90815021)。
作者簡介:秦樂,碩士研究生,Email:09121568@bjtu.edu.cn
參考文獻
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