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风帆体型建筑表面风压的分布特征研究
引用本文:沈国辉,钱 涛,何国军,王富林,黄建林.风帆体型建筑表面风压的分布特征研究[J].湖南大学学报(自然科学版),2013,40(9):1-6.
作者姓名:沈国辉  钱 涛  何国军  王富林  黄建林
作者单位:浙江大学土木工程学系;中国汉嘉设计集团;宁波市北仑区建筑工务局;中联筑境建筑设计有限公司
基金项目:国家自然科学基金资助项目(51178425)
摘    要:针对典型风帆体型建筑的风荷载采用风洞试验方法进行研究,给出典型风向下风帆建筑的平均风压和脉动风压的分布特征,探讨该体型建筑产生此类分布的原因,并分析围护结构设计时风帆体型建筑的最不利受风区域.研究表明:风帆容易形成"前压后吸"的风压分布,对于迎风面积大、厚度却相对较小的风帆建筑整体抗风较为不利;脉动风压系数与平均风压系数分布规律较为相似,背风区的风压脉动小于侧风区;当风帆建筑锋利边缘处于侧迎风时,来流风会在锋利边缘发生显著的气动分离,使得该区域出现极大的负压.

关 键 词:风压  风帆建筑  风洞  极值风压  兜风效应

Investigation of Wind Pressure Distribution on a Sail-shaped Building
SHEN Guo-hui,QIAN Tao,HE Guo-jun,WANG Fu-lin,HUANG Jian-lin.Investigation of Wind Pressure Distribution on a Sail-shaped Building[J].Journal of Hunan University(Naturnal Science),2013,40(9):1-6.
Authors:SHEN Guo-hui  QIAN Tao  HE Guo-jun  WANG Fu-lin  HUANG Jian-lin
Institution:SHEN Guo-hui;QIAN Tao;HE Guo-jun;WANG Fu-lin;HUANG Jian-lin;Dept of Civil Engineering,Zhejiang Univ;Hanjia Design Group of China;Bureau of Construction Works of Beilun District;China United Zhujing Architecture Design Company Limited;
Abstract:In order to obtain the wind pressures on a sail-shaped building, the wind tunnel testing method was employed. The distribution characteristics of mean wind pressure and fluctuating wind pressure on the sail-shaped building were presented, and the causes leading to the distribution were analyzed. The most unfavorable region of the building under different wind azimuths was also investigated for the wind-resistant design of cladding structure. The results have shown that the wind pressure on a sail-shaped building tends to bear press on the windward face and suction on the leeward face, leading to unfavorable wind loading case for the sail-shaped building which has large area with small width. The distributions of mean wind pressure and fluctuating wind pressure on the building are mostly similar, and the fluctuation on the leeward face is usually smaller than that on the side wind zone. When the shape edges of the sail-shaped building are on the side wind direction, strong pneumatic separation will occur, resulting in significant negative wind pressure on the edges.
Keywords:wind pressure  sail-shaped building  wind tunnel  peak wind pressure  wind-catching effect
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