- 摘 要
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［摘要］利用高層建筑剛性模型測壓風(fēng)洞試驗結(jié)果，對順風(fēng)向風(fēng)荷載豎向、水平相干性，迎背風(fēng)面相干性以及橫風(fēng)向、扭轉(zhuǎn)方向風(fēng)荷載相干性的主要特征進(jìn)行研究。利用算例說明了迎背風(fēng)面相干性以及橫-扭風(fēng)荷載相干函數(shù)對于風(fēng)振響應(yīng)的影響。從計算結(jié)果來看，迎背風(fēng)面全相干假定將使順風(fēng)向風(fēng)振響應(yīng)計算結(jié)果偏于保守；當(dāng)結(jié)構(gòu)剛心和質(zhì)心偏離時，假定橫扭風(fēng)荷載相干性等于零會低估橫風(fēng)向和扭轉(zhuǎn)方向風(fēng)振響應(yīng)。
［關(guān)鍵詞］高層建筑; 順風(fēng)向風(fēng)荷載; 橫風(fēng)向風(fēng)荷載; 扭轉(zhuǎn)風(fēng)荷載; 相干性
中圖分類號： TU312.1，TU973 文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2011)11-0121-04
Research on coherences of wind loads on tall buildings
Tang Yi, Yan Yalin，Jin Xinyang（CABR Technology Co., Ltd., China Academy of Building Research, Beijing 100013, China）
Abstract:Several tall building models were tested in a wind tunnel for the wind pressures acting on the buildings. The vertical coherences of along-wind, across-wind and torsion wind loads and lateral coherences of along-wind load are analyzed in detail. Coherences between pressure on windward and leeward faces and between across-wind and torsion wind loads are researched. Then effects of the coherences on wind excited structural responses are studied. The results indicate, when the stiffness and mass centers deviate with each other, structural responses are underestimated without considering coherence between cross-wind and torsion wind loads. Full coherences assumption of the windward and leeward pressure may result in over-estimation of along-wind response.
Keywords: tall buildings; along-wind; across-wind; torsion wind load; coherences
*國家自然科學(xué)基金重大研究計劃面上項目（90815015）。
作者簡介：唐意（1978-）,男，博士，副研究員,研究方向：風(fēng)工程與荷載，Email:tangyi@cabrtech.com。
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