均匀流场中干扰对超高层建筑横风向风荷载的影响  

Effects of Interference on Cross-wind Loads of Super High-rise Buildings in Uniform Flow Fields

作　　者：胡涌 汤建平 陈伏彬 HU Yong;TANG Jianping;CHEN Fubin

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114 [2]中机国际工程设计研究院有限责任公司,湖南长沙410021

出　　处：《重庆建筑》2025年第1期36-39,共4页Chongqing Architecture

基　　金：国家自然科学基金面上项目(52278479);湖南省自然科学基金(2023JJ30016)。

摘　　要：通过风洞试验,在均匀流场中对单栋建筑在不同位置干扰下的超高层建筑模型进行了同步测压试验,基于试验结果分析了不同干扰比和干扰间距下超高层建筑层升力系数随高度的变化、横风向基底弯矩系数的干扰效应以及干扰效应对横风向风力功率谱密度的影响。研究结果表明,干扰比和干扰间距对高层建筑横风向风力特性的影响效果显著。随着干扰间距的增大,层脉动升力系数逐渐增大。干扰间距较小时,层脉动升力系数对干扰比较为敏感,横风向脉动基底弯矩系数随干扰间距的增大而增大。且当干扰间距大于5a时,干扰因子大于1。干扰间距较小时,层脉动升力功率谱出现明显双峰。研究成果可为此类结构的抗风设计提供参考。Wind tunnel experiments were conducted to study the interference effects on a super high-rise building model subjected to various positions of disturbance in a uniform flow field.Synchronous pressure measurements were performed,and the results were analyzed to investigate the variation of layer lift coefficients with height,the interference effects on cross-wind base moment coefficients,and the impact of interference on the cross-wind force power spectral density under different interference ratios and distances.The results indicate that interference ratios and distances significantly influence the cross-wind force characteristics of high-rise buildings.As the interference distance increases,the layer fluctuating lift coefficient increases progressively.At smaller interference distances,the layer fluctuating lift coefficient is more sensitive to the interference ratio,and the cross-wind fluctuating base moment coefficient increases with interference distance.Additionally,when the interference distance exceeds 5a,the interference factor is greater than 1.At smaller interference distances,the layer fluctuating lift power spectrum exhibits distinct double peaks.The findings provide valuable references for wind-resistant design of similar structures.

关 键 词：超高层建筑 风洞试验 干扰比 横风向 功率谱密度 

分 类 号：TU973[建筑科学—结构工程]