风场水平空间相关性对长悬臂钢连廊风致效应的影响  

The Influence of Turbulent Transverse Space Correlation on Wind-Induced Response of Long Cantilever Steel Corridors

作　　者：夏亮 张明山[1,2] 李本悦 徐铨彪[1,2] 杨嘉胤 XIA Liang;ZHANG Mingshan;LI Benyue;XU Quanbiao;YANG Jiayin(The Architectural Design&Research Institute of Zhejiang University,Hangzhou 310028,China;Center for Balance Architecture,Zhejiang University,Hangzhou 310028,China)

机构地区：[1]浙江大学建筑设计研究院有限公司,杭州310028 [2]浙江大学,平衡建筑研究中心,杭州310028

出　　处：《建筑钢结构进展》2020年第6期113-119,共7页Progress in Steel Building Structures

基　　金：住房和城乡建设部科技项目(2019-k-076);浙江省建设科研项目(2019K027)。

摘　　要：以某两栋办公单体间的长悬臂钢连廊为原型,考虑沿钢连廊长度方向的脉动风速非完全相关性,采用谐波叠加法模拟风速时程,并基于准定常假定进行钢连廊的风振时域分析,得到了结构的风振响应和杆件内力。研究表明:由于该钢连廊的特殊体型,在考虑脉动风速水平向空间相关性后,悬挑端的加速度响应增大明显,并产生了扭转振动;钢连廊的风振系数,尤其是长悬挑部分的风振系数增大效应明显;部分构件的内力增幅明显。因此,在长悬臂钢连廊设计中应考虑风速水平空间相关性对风致效应的影响。This paper takes a long cantilever steel corridor between two office units as the prototype,and presents a simulation on the dynamic wind velocities considering the effects of turbulent transverse space correlation(TTSC).WAWS is applied in the simulation.In addition,based on the quasi-steady assumption,a numerical analysis in time domain is performed in order to obtain the time-history of wind-induced response of structure and the internal force of structural members.The research shows that due to the special shape of steel corridor,after considering the spatial correlation of pulsating wind speed,the acceleration response of the cantilever end increases obviously and produces torsional vibration.The wind vibration coefficient of the steel corridor,especially the long cantilever part,increases obviously.The internal force of some components increases significantly.Therefore,the influence of spatial correlation of wind speed on wind effect should be considered in the design of long cantilever steel corridors.

关 键 词：长悬臂钢连廊 水平空间相关性 谐波叠加法 风振响应 风振系数 杆件内力 

分 类 号：TU391[建筑科学—结构工程]