摘要
在相邻建筑物的干扰下,受扰高层建筑的风荷载与其在孤立状态下相比会有较大的变化。本文采用动态测力天平技术,通过模型风洞试验研究了方形截面高层建筑在周边另一个同样建筑的气动干扰下,其平均、脉动和峰值扭转风荷载的干扰效应,分析了建筑物间距、风场和风向角等参数的影响。研究表明,高层建筑扭转荷载的干扰效应很显著,B类风场0°风向角下,峰值扭矩干扰因子IFp可达2.1,45°风向角下更可高达3.5。最后通过分析受扰模型的基底扭矩谱讨论了上游建筑旋涡脱落的影响。
As the aerodynamic interference of neighboring buildings, wind loads on tall buildings are considerably different from those on isolated buildings. In this paper, the interference effects on wind-induced torsional loads between two tall buildings with square cross-sections are studied by using high-frequency-force-balance technique in TJ-1 Atmospheric Boundary Layer Wind Tunnel. The values of interference factors of mean, rms and peak torsional loads at various configurations are presented. The interference factor of peak torsional loads （IFp） are high to 2.1 and 3.5 at 0° and 45° wind direction in terrain category B, respectively. The influence of relative position of two buildings, upstream terrain and wind direction are analysed. At last the influences of the upstream model vortex shedding on the downstream model are discussed on the basis of the downstream model torque power spectra.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2005年第4期86-91,共6页
Journal of Building Structures
基金
国家创新研究群体科学基金(50321003)
教育部"高等学校骨干教师资助计划"联合资助。
关键词
高层建筑
扭转风荷载
干扰效应
动态测力天平
tall buildings
torsional wind load
interference effect
high-frequency-force-balance
