花炳灿，  汪丛军，  余雨生，  孙海东
（上海现代建筑设计（集团）有限公司，上海200041)

[摘要] 高层建筑扭转风荷载是一个常常受忽视的因素，截面形状、周围建筑干扰度对扭转风荷载产生影响。针对上海宝矿国际广场办公楼平行四边形截面的超高层建筑，采用数值模拟和风洞试验方法，对该高层建筑的扭转风荷载进行详细的研究，分析得知平行四边形截面形状在一些风向下产生的扭转偏心率超过0. 25，周围建筑物的干扰会严重影响扭转风荷载的大小，因此抗风设计应考虑风的扭转效应。
[关键词] 高层建筑；扭转风荷载；数值模拟；风洞试验；干扰效应

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