拟建高大建筑对邻近建筑整体风荷载的影响

Effects of A Super-high-rise Building on Wind Loads of An Adjacent Building

基于一栋既有高层建筑的刚性模型测压风洞试验,讨论了邻近更高大的拟建超高层建筑及周边其他建筑对其整体风荷载的干扰效应.试验结果表明,当拟建超高层建筑处在上游时,遮挡效应一般会减小下游既有建筑的顺风向气动力平均值,但尾流旋涡脱落现象会导致下游既有建筑的横风向风荷载峰值显著增大,这可能使得下游既有建筑的原始结构设计偏于危险.

Based on a series of wind tunnel tests conducted on the rigid model of an actual high-rise building, wind dynamic interference effects on the target building of the proposed super high-rise building and other surrounding buildings were investigated. The results show that upon completion of the proposed building upstream, the shielding effect of it will generally reduce the along-wind mean aerodynamic force of the existing buildings downstream. However, the vortex shedding in its wake may lead to a significant increase in the across-wind peak wind load of the existing buildings downstream, which means that these downstream buildings under the original structural design may no longer be safe.