（1 山东同圆设计集团有限公司， 济南 250101； 2 北京交通大学土木建筑工程学院, 北京 100044；3 山东建筑大学， 济南 250101； 4 上海市建筑科学研究院上海市工程结构安全重点实验室， 上海 200032）

［摘要］以矢跨比为1/6、支承高度为200mm的大跨球面屋盖为模型进行风洞试验，运用极值统计理论对风压极值相关性进行了定性和定量分析，运用结构变量法求得了联合保证率为78%的风压极值，并根据一元极值的风压极值算得折减系数，分析结果表明，在球面屋盖顺风向中心线范围内，屋盖背风面的折减系数均大于屋盖迎风面的折减系数。进一步研究了风压极值折减系数与风压极值相关性，得到折减系数与相关性度量呈正比。

［关键词］围护结构； 风压极值相关性； 风压极限； 折减系数； 极值统计理论

中图分类号：TU973+.32文献标识码：A文章编号：1002-848X(2018)06-0109-05

Study on correlation and reduction coefficient of wind pressure extremum of enclosure structure for spherical roof

 Liu Hao1,  Wang Xia2,  Wei Ye3, Tian Yuji2,4

(1 Shandong Tongyuan Design Group Co.， Ltd.，  Jinan 250101，   China; 2 School of Civil Engineering and Architecture, Beijing Jiaotong University， Beijing 100044, China; 3 Shandong Jianzhu University， Jinan 250101，   China; 4 Shanghai Key Laboratory of Engineering Structure Safety， Shanghai Architectural Science Research Institute， Shanghai 200032，   China)

Abstract:The wind tunnel test was carried out on a large-span spherical roof with a span ratio of 1/6 and a bearing height of 200mm. The extremum statistics theory was used to qualitatively and quantitatively analyze the correlation of wind pressure extremum. The structural variable method was used to obtain the wind pressure extremum with a joint guarantee rate of 78%, and the reduction coefficient was calculated according to the wind pressure extremum of the univariate extremum. The analysis results show that in the centerline area of windward surface of the spherical roof, the reduction coefficient in leeward surface of the roof is greater than that of the roof windward surface. The correlation between wind pressure reduction coefficient and wind pressure extremum was further studied, and the reduction coefficient was proportional to the correlation measure.

Keywords:enclosure structure; wind pressure extremum correlation; wind pressure; reduction coefficient; extremum statistics theory

作者简介：刘浩，硕士，工程师，liuhao2010sdty@163.com。