中文摘要：

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。

英文摘要：

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.