摘要
以天津国际金融会议酒店为例,采用多通道同步测压风洞试验技术,研究了周围高层建筑对大跨屋盖风荷载的干扰效应。试验结果表明:位于大跨屋盖两侧的高层建筑将引起明显的'穿堂风'效应,作用于大跨屋盖的风荷载将显著增加,但大跨屋盖上游高层建筑的'遮挡'作用,有利于减小两侧高层建筑引起的'穿堂风'效应,而下游高层建筑会加剧屋盖局部区域的'穿堂风'效应。周围高层建筑物的出现,增加了来流中的湍流成分,使得作用于大跨屋盖的脉动风荷载增大。
Simultaneous multi-channel pressure measuring tests have been carried out in a wind tunnel to investigate the interference effects of surrounding buildings on the wind load of long-span roof, taking Tianjin international financial hotel for example. The test results show that： due to the narrow road effect caused by high-rise buildings on both sides of the long-span roof, the mean wind pressure on the roof increases significantly, but the windbreak effect of high rise buildings located on the upstream of the long-span roof decreases the narrow road effect and buildings located on the downstream increases the effect, resulting in increase of wind load on lo- cal areas of the roof. Due to the surrounding high-rise buildings, the turbulence in the coming flow is increased and the turbulence wind loads acting on the long-span roof is also inereased.
出处
《实验流体力学》
EI
CAS
CSCD
北大核心
2012年第5期27-30,41,共5页
Journal of Experiments in Fluid Mechanics
基金
国家自然科学基金重大研究计划重点项目(90815021)
中央高校基本科研业务费(2011JBM262)资助
关键词
大跨屋盖
干扰效应
风荷载
风洞试验
压力系数
long-span roof
interference effect
wind load
wind tunnel test
pressure coefficient
