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花炳燦，  汪叢軍，  余雨生，  孫海東
（上?，F(xiàn)代建筑設(shè)計(jì)（集團(tuán)）有限公司，上海200041)

[摘要] 高層建筑扭轉(zhuǎn)風(fēng)荷載是一個(gè)常常受忽視的因素，截面形狀、周圍建筑干擾度對(duì)扭轉(zhuǎn)風(fēng)荷載產(chǎn)生影響。針對(duì)上海寶礦國(guó)際廣場(chǎng)辦公樓平行四邊形截面的超高層建筑，采用數(shù)值模擬和風(fēng)洞試驗(yàn)方法，對(duì)該高層建筑的扭轉(zhuǎn)風(fēng)荷載進(jìn)行詳細(xì)的研究，分析得知平行四邊形截面形狀在一些風(fēng)向下產(chǎn)生的扭轉(zhuǎn)偏心率超過(guò)0. 25，周圍建筑物的干擾會(huì)嚴(yán)重影響扭轉(zhuǎn)風(fēng)荷載的大小，因此抗風(fēng)設(shè)計(jì)應(yīng)考慮風(fēng)的扭轉(zhuǎn)效應(yīng)。
[關(guān)鍵詞] 高層建筑；扭轉(zhuǎn)風(fēng)荷載；數(shù)值模擬；風(fēng)洞試驗(yàn)；干擾效應(yīng)

Wind - induced Torsion and its Structure Wind - resistant Design on Shanghai BM Building Plaza
Hua Bingcan, Wang Congjun, Yu Yusheng, Sun Haidong
( Shanghai Xian Dai Architectural Design( Group)  Co., Ltd, Shanghai, 200041)

Abstract: Wind - induced torsions on the tall buildings are always neglected in the structural design.  They are affected by the section shapes and interference effect. This paper studied the wind - induced torsions on the tall buildings with parallelogram sections in detail by the high - resolution numerical simulation method and wind tunnel test. This study shows the normalized eccentricity of torsional moment could be above 0.25. The interference effect could also increase the torsional moment.  So for the tall buildings with parallelogram cross - section the torsional wind loads should be considered in the structural design.
Keywords: high - rise building; torsional wind load; numerical simulation; wind tunnel test; interference effect