杭州萧山国际机场T4航站楼主楼屋盖风荷载的风洞试验与数值模拟研究  

Study on wind tunnel test and numerical simulation of wind load on the roof of Hangzhou Xiaoshan International Airport T4 terminal building

作　　者：郑德乾 柳阔 全涌[2] 陈华[3] 潘钧俊 ZHENG Deqian;LIU Kuo;QUAN Yong;CHEN Hua;PAN Junjun(School of Civil Engineering,Henan University of Technology,Zhengzhou 450001,China;State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;China Construction Eighth Engineering Division Co.,Ltd.,Shanghai 200135,China)

机构地区：[1]河南工业大学土木工程学院,郑州450001 [2]同济大学土木工程防灾国家重点实验室,上海200092 [3]中国建筑第八工程局有限公司,上海200135

出　　处：《建筑结构》2021年第23期28-33,共6页Building Structure

摘　　要：综合采用风洞试验和计算流体动力学(简称CFD)数值模拟方法,对萧山国际机场T4航站楼主楼屋盖表面风荷载进行了分析研究。首先,分析了屋盖表面典型位置的平均风压系数和脉动风压系数随风向角的变化规律,进而研究了具有较大平均和脉动风压系数的75°和270°风向角下,屋盖短轴中心位置和边缘位置截面测点平均风压系数随位置的变化情况;然后,研究了典型风向角下屋盖表面体型系数等值线云图,并给出了用于屋盖结构抗风设计的分块体型系数;最后,结合CFD数值模拟所得屋盖周围流场,分析了屋盖风荷载作用机理。结果表明,来流在屋盖迎风边缘位置存在较为明显的流动分离现象,屋盖总体上处于流动分离区,导致屋盖总体表现为受到向上的风吸力作用;屋盖迎风边缘位置流动分离更为显著,因此该位置的风吸力也最大,比较容易引起屋盖的局部受风破坏。Wind load on the roof surface of Xiaoshan International Airport T4 terminal building was investigated by adopting wind tunnel test and computational fluid dynamics(CFD)numerical simulation methods.Firstly,variation law of the mean wind pressure coefficient and fluctuating wind pressure coefficient of typical positions on the roof surface were analyzed under different wind angle of attack.The mean wind pressure coefficient,along the central line and the leading edge sections at the short-axis orientation of the roof of the building,were compared at wind angles of attack of 75°and 270°with large mean and fluctuating wind pressure coefficients.Subsequently,distributions of the contour of shape coefficients of the roof surface were discussed at typical wind angle of attack,and the corresponding block shape coefficients were also gived for wind resistance design of roof structure.Finally,mechanism of the wind load distribution on the roof was analyzed,based on the flow field around roof by CFD numerical simulation.The results show that there is a relatively obvious flow separation phenomenon in the incoming flow at the windward edge of the roof,and the roof is generally in the flow separation zone,resulting in the overall performance of the roof subjected to upward wind suction.The flow separation is more significant at windward edge of roof,the wind suction gets maximum correspondingly at those zones,causing local wind induced damages of the roof.

关 键 词：杭州萧山国际机场 风洞试验 数值模拟 航站楼 大跨屋盖 风荷载 

分 类 号：TU312.1[建筑科学—结构工程]