高层建筑脉动风荷载特性  

Characteristics of fluctuating wind loads on high-rise buildings

作　　者：杨庆山[1,2] 单文姗 田村幸雄 金容徹 Yang Qingshan;Shan Wenshan;Tamura Yukio;Kim Youg Chul(School of Civil Engineering,Chongqing University,Chongqing 400044,China;Chongqing Key Laboratory of Wind Engineering and Wind Energy Utilization,Chongqing University,Chongqing 400044,China;Tokyo Polytechnic University,Atsugi 243-0297,Japan)

机构地区：[1]重庆大学土木工程学院,重庆400044 [2]重庆大学风工程与风资源利用重庆市重点实验室,重庆400044 [3]东京工艺大学,日本厚木243-0297

出　　处：《土木工程学报》2023年第5期1-17,88,共18页China Civil Engineering Journal

基　　金：国家自然科学基金创新研究群体项目(52221002);高等学校学科创新引智计划(B13002,B18062)。

摘　　要：高层建筑数量多、分布广,其抗风问题受到广泛重视。为全面总结高层建筑风压和风荷载特性,文章对前人研究进行综述,并对来流顺风向风速与方形断面高层建筑模型表面风压开展同步测量。分析风速-迎风面风压准定常理论关系和风速-风压/力气动导纳,及建筑各表面点风压时特性、频特性、空间分布特性、概率分布特性和空间相干性;阐明迎-背风面阻力相关性,明确两侧风面升力间相关性并分析横风向升力的时、频特性;通过相平面轨迹和相关函数研究了正风向下基底弯矩和扭矩相关性。最后明确了当风向变化时,基底弯矩和扭矩时特性、频特性、(非)高斯特性及互相关特性的变化规律。在综合前人研究的同时,系统明晰风速-风压-风力的传递关系,完整阐述高层建筑表面风压和风荷载的时、频特性,全面概括了高层结构抗风设计过程中风荷载基本概念。Due to the large amount and wide distribution of high-rise buildings,the wind resistance of high-rise buildings is paid widely attention.In order to comprehensively summarize the characteristics of wind pressure and wind load on high-rise buildings,previous relative researches are reviewed,meanwhile synchronously measurement of longitudinal wind velocity and wind pressure on squared high-rise building model are performed in a boundary wind tunnel.Quasisteady theoretical relation of velocity and windward pressure,and velocity-pressure/force aerodynamic admittances are addressed.Wind pressure characteristics in both time and frequency domain,spatial distribution,probability distribution,and spatial coherence are analyzed in detail.The correlation between the windward and leeward drag forces is clarified.The correlation between the lift forces on two sideward walls is clarified,and across-wind lift force are analyzed in both time and frequency domain;phase-plane trajectories and correlation functions are analyzed to study correlations of wind force components.At last,wind force characteristics and their cross-correlations varying with wind directions are clarified.With synthesizing previous studies,this review systematically clarifies the relationship between wind velocity,wind pressure and wind force,completely states the characteristics of wind pressure and wind load on high-rise buildings in both time and frequency domain,and comprehensively summarizes the basic concepts of wind load in wind resistance design phase of high-rise structures.

关 键 词：高层建筑 脉动风压 风荷载 准定常 气动导纳 相关性 

分 类 号：TU398.9[建筑科学—结构工程]