外立面形式对高层建筑表面风压影响研究  

Effects of facade form on surface wind pressure of high-rise building surface

作　　者：王培杰 沈炼 韩艳 杨瑛 王胜德 汪阔 WANG Peijie;SHEN Lian;HAN Yan;YANG Ying;WANG Shengde;WANG Kuo(College of Civil Engineering,Changsha University of Science&Technology,410076 Changsha,China;College of Civil Engineering,Changsha University,410022 Changsha,China;China Construction Fifth Engineering Division Co.,Ltd.,410083 Changsha,China)

机构地区：[1]长沙理工大学土木工程学院,长沙410076 [2]长沙学院土木工程学院,长沙410022 [3]中国建筑第五工程局有限公司,长沙410083

出　　处：《应用力学学报》2024年第4期928-937,共10页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金优秀青年项目(No.51822803);长沙市杰出青年基金项目(No.kq195004);湖南省教育厅科学研究重点项目(No.253668);长沙理工大学研究生实践创新与创业能力提升项目(No.SJCX202118)。

摘　　要：针对当前高层建筑典型外立面形式,以长沙市同有大厦为研究对象,基于SST k-ω湍流模型对增设阳台、不同凹凸外形及不同格栅类型等9种外立面高层建筑表面风压进行了详细分析,明确了不同外立面形式下建筑表面风压分布特性,并结合高层建筑周围流场信息,揭示了外立面形式对其表面风压的影响机理。结果表明:外立面增设阳台会导致迎风面风压系数最大值增加,背风面风压系数负值最大值减小;同时,阳台会使来流在建筑顶层阳台顶端出现流动分离,在高层建筑迎风面顶部形成局部负压;相比光滑立面,凹、凸立面会导致高层建筑迎风面和背风面表面风压差增加,建筑物靠近顶部区域会出现压力突变现象,且在墙角处会出现较大负值;增设竖向格栅同样会增大高层建筑迎风面和背风面压差,而横向和矩形格栅对结构风荷载影响相对较小。Based on the SST k-ωturbulence model,the surface wind pressure of nine high-rise buildings,such as balconies,different concave and convex shapes and different grid types,is analyzed in detail.The wind pressure distribution characteristics of the building surface under different facade forms are clarified,and the mechanism of the facade form's influence on the surface wind pressure of the high-rise buildings is revealed in combination with the flow field information around the high-rise buildings.The results show that the maximum value of windward wind pressure coefficient increases and the maximum value of negative value of leeward wind pressure coefficient decreases with the addition of balcony on the facade.And balcony density has some influence to these.At the same time,the balcony will cause the flow to separate at the top of the balcony on the top floor of the building and form a local negative pressure on the top of the windward surface of the high-rise building.Compared with the smooth facade,the concave and convex facades will lead to an increase in the wind pressure difference between the windward surface and the leeward surface of the high-rise building.The phenomenon of pressure mutation will occur in the area near the top of the building,and a large negative value will appear at the corner of the wall.The addition of vertical grilles will also increase the pressure difference between the windward and leeward surfaces of high-rise buildings,while the lateral and rectangular grilles have a relatively small impact on structural wind loads.

关 键 词：高层建筑 数值模拟 SST k-ω湍流模型 外立面 风压系数 

分 类 号：TU312.1[建筑科学—结构工程]