- 摘 要
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［摘要］在邊界層風洞中對10個典型超高層建筑模型進行測壓試驗，獲得了測點層的順風向、橫風向和扭轉方向的風荷載，整理了橫風向風荷載的功率譜、相關系數和水平、豎向相干函數，分析了流場繞流的特點，總結了橫風向風力對扭轉的貢獻。得到如下結論：選取分離點作為參考點時，橫風向水平相關性隨厚寬比增加變化較大，通過確定其零點位置可以定量確定再附點位置；橫風向風力豎向相關性受所選基點位置影響程度較??；豎向相干性隨厚寬比增大而降低；模型厚寬比大于 1.5時，結構扭矩譜幾乎全部由橫風向貢獻。
［關鍵詞］超高層建筑; 厚寬比; 功率譜; 相關系數; 相干函數
中圖分類號：TU312.1, TU973.213 文獻標識碼： A文章編號：1002-848X(2011)11-0118-03
Wind tunnel test study on across-wind loads of rectangular super high-rise buildings
Yan Yalin, Jin Xinyang, Tang Yi, Wu Lin(CABR Technology Co., Ltd., China Academy of Building Research, Beijing 100013, China)
Abstract：Based on 10 pressure tests in boundary layer wind tunnel for rectangular super highrise buildings, wind loads in along-wind, across-wind and torsional directions were calculated. Across-wind load power spectrum, relation coefficient and coherent function in horizontal and vertical were analyzed for the character of the wind flow field. Contribution of across-wind force for torsion was summarized. The summarized results indicate that across-wind horizontal relation coefficient varies with the depth-width ratio while the reference point is at separation point, and the reattachment can be found at the point where the relation coefficient equals to zero. Across-wind vertical relation coefficient varies little with reference point, and coherent coefficient decreases with increase of depth-width ratio. When depth-width ratio is greater than 1.5, the torsion spectrum are almost contributed by the across wind.
Keywords: super high-rise building; depth-width ratio; power spectrum; relation coefficient; coherent function
*國家自然科學基金重大研究計劃面上項目(9081505)。
作者簡介：嚴亞林（1985-）,男，博士生，研究方向：風工程與荷載,Email:yanyalin@cabrtech.com。
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