摘要
针对缩尺比为1∶200的某体育场刚性模型开展风洞测压试验,研究悬挑屋盖表面风压分布特征及其风载变化规律.结果表明:对屋盖整体而言,其上下表面均受风吸力作用且二者随风向角的变化呈相同的变化趋势;来流上游屋盖表面净平均风压系数趋于0,来流下游屋盖表面净平均风压系数为负值,屋盖总体受到向上的升力;来流下游屋盖内缘迎风区域的风压波动强烈,净脉动风压系数远大于其他区域;净极小值风压系数分布规律与净脉动风压系数分布规律一致,均在来流下游屋盖内缘迎风区域达到最大值,抗风设计中应对该区域进行加强.
The rigid model of stadium with a scale ratio 1∶200 was adopted to obtain the distribution regularity of wind pressure on upper and lower surface of the cantilevered roof,by using synchronous pressure measurement in wind tunnel test.The results indicated that both of the upper and lower surface suffers suctions and show the same tendency with variation of wind direction.The net mean wind pressure coefficients on roof located in upcoming flow is nearly to be 0 while the negative net wind pressure coefficients is found on roof in downstream flow field,which result in uplift force for the whole roof.The fluctuation of wind pressure in windward region of inner side for roof located in downstream flow field is more intensive than other part and the net fluctuating wind pressure coefficients is larger as well.The net min wind pressure coefficients show the same regularity with net fluctuating wind pressure coefficients,both of which get the maximum absolute value in windward region of inner side for roof located in downstream flow field,so the corresponding areas should be enhanced in wind resistance design.
作者
陶林
戴益民
刘泰廷
徐瑛
袁养金
TAO Lin;DAI Yimin;LIU Taiting;XU Ying;YUAN Yangjin(Key Laboratory for Wind Resistance and Vibration Control of Structures in Hunan Province,Xiangtan 411201,China;School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2021年第4期25-32,共8页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
国家自然科学基金资助项目(51578237)
湖南省研究生学位教育改革重点项目资助(2019JGZD063)
湖南省教育厅科学研究重点项目资助(19A168)。
关键词
悬挑屋盖
风洞试验
层间缝隙
风压系数
cantilevered roof
wind tunnel test
slots between roof floors
wind pressure coefficients
