周边建筑对在建超高层塔楼的风场干扰效应研究

Study on Wind Field Interference Effects of Surrounding Buildings on Super High-rise Towers Under Construction

针对建筑风环境的研究主要集中于建筑形态抗风设计,在数值模拟方面多聚焦于建筑场地通风效果研究,而针对建筑表面幕墙风压和施工过程中的建筑风压研究则相对较少。因此,以上海市某超高层塔楼为研究对象,从城市建筑轮廓图提取周边建筑数据建立数值模型,对目标单独建筑模型和建筑群模型2种工况的8个风向进行CFD模拟,以研究周边建筑对超高层施工的风场干扰效应。结果表明:在低高度处,低矮建筑密集,遮挡效应对目标建筑风场削弱较为明显;而中间以上高度,目标建筑在多个方向受邻近超高层的遮挡效应和峡谷效应干扰严重,负压出现明显增幅。

The research on the wind environment of buildings primarily focuses on wind resistance design concerning architectural forms.Numerical simulations mainly concentrate on the ventilation effects at building sites,while studies on wind pressure on the building's curtain wall and during the construction process are relatively limited.Therefore,a super high-rise tower in Shanghai is selected as the study subject.A numerical model is established by extracting data of surrounding buildings from urban building contour maps.CFD simulations are conducted for eight wind directions under two conditions:a single building model and a building group model,to investigate the wind field interference effects of surrounding buildings on super high-rise construction.The results show that at lower heights,where low-rise buildings are dense,the occlusion effect significantly weakens the wind field of the target building.Conversely,at mid-height and above,the target building is considerably affected by the shielding and canyon effects of nearby super high-rise buildings in multiple directions,leading to a substantial increase in negative pressure.