［摘要］利用高层建筑刚性模型测压风洞试验结果，对顺风向风荷载竖向、水平相干性，迎背风面相干性以及横风向、扭转方向风荷载相干性的主要特征进行研究。利用算例说明了迎背风面相干性以及横-扭风荷载相干函数对于风振响应的影响。从计算结果来看，迎背风面全相干假定将使顺风向风振响应计算结果偏于保守；当结构刚心和质心偏离时，假定横扭风荷载相干性等于零会低估横风向和扭转方向风振响应。
［关键词］高层建筑; 顺风向风荷载; 横风向风荷载; 扭转风荷载; 相干性
中图分类号： TU312.1，TU973 文献标识码：A文章编号：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
*国家自然科学基金重大研究计划面上项目（90815015）。
 作者简介：唐意（1978-）,男，博士，副研究员,研究方向：风工程与荷载，Email:tangyi@cabrtech.com。
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