削角、凹角截面高层建筑气动力研究
引用文献：
刘建文 廖朝阳 邓羊晨. 削角、凹角截面高层建筑气动力研究[J]. 建筑结构，2022，48（22）：95-100.
LIU Jianwen LIAO Zhaoyang DENG Yangchen. Study on aerodynamic characteristics of high-rise buildings with chamfered and concave corners[J]. Building Structure，2022,48（22）：95-100.
摘要：因高层建筑结构具有自振周期较长、阻尼低以及沿高度分布质量较轻的特点，风荷载往往成为高层建筑设计的主要控制荷载，而高层建筑的外形对结构的抗风性能影响显著，为研究不同横截面高层建筑的气动特性，采用数值模拟方法，对六种不同截面(方形、矩形及10%修正率的削角、凹角截面)的气动特性进行了全风向下数值模拟计算，分析比较了不同截面的风压系数、气动力系数以及斯托罗哈数等参数。结果表明：削角、凹角截面可以有效减小气动阻力，其中，削角截面减阻效果最为明显，在小风向角下阻力可以最大减小30%。但是，削角、凹角截面的角点上风压系数变化剧烈，其中最大可达到未修正截面的14倍之多，且相比于未修正截面，削角、凹角截面风压系数受紊流度影响较大。
关键词：高层建筑；削角截面；凹角截面；气动特性；气动阻力；
基金：大泽湖海归小镇国际社区配套设施研究(KY03-0000-2022-0011)。
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[3] 王磊，梁枢果，王泽康，等.超高层建筑横风向风振局部气动外形优化[J].浙江大学学报(工学版),2016,50(7):1239-1246,1265.
[4] IRWIN P A.Bluff body aerodynamics in wind engineering[J].Journal of Wind Engineering and Industrial Aerodynamics,2008,96(6/7):701-712.
[5] 顾明，唐意，全涌.矩形超高层建筑横风向脉动风力.Ⅰ:基本特征[J].振动与冲击，2010,29(6):42-45,104,234.
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[7] 全涌.超高层建筑横向风荷载及响应研究[D].上海：同济大学，2002.
[8] 曹会兰，全涌，顾明.一类准方形截面超高层建筑顺风向气动阻尼[J].振动与冲击，2012,31(22):84-89.
[9] BOURIS D,BERGELES G.2D LES of vortex shedding from a square cylinder[J].Journal of Wind Engineering and Industrial Aerodynamics,1999,80(1/2):31-46.
[10] HASAN M A Z.The near wake structure of a square cylinder[J].International Journal of Heat and Fluid Flow,1989,10(4):339-348.
Study on aerodynamic characteristics of high-rise buildings with chamfered and concave corners
Abstract: Due to the long natural vibration period, low damping and light distribution of mass along the height of high-rise building structures, wind load is often the main control load in high-rise building design. The shape of high-rise building has a significant influence on the wind resistance of structures. In order to study the aerodynamic characteristics of high-rise buildings with different cross-sections, the numerical simulation method was used to simulate and calculate the aerodynamic characteristics of six different sections(square, rectangular, and chamfered and concave section with 10% correction rate) numerically in full wind down. The parameters such as wind pressure coefficient, aerodynamic coefficient and Strouhal Number of different sections were analyzed and compared. The results show that the chamfered and concave sections can effectively reduce the aerodynamic drag, among which the chamfered section has the most obvious drag reduction effect, and the drag can be reduced by 30% at a small wind direction angle. However, the wind pressure coefficients at the corners of the chamfered and concave sections change drastically, and the maximum can be as much as 14 times that of the uncorrected sections. Compared with the uncorrected sections, the wind pressure coefficients of the chamfered and concave sections are largely affected by the turbulence intensity.
Keywords: high-rise building; chamfered section; concave section; aerodynamic characteristics; aerodynamic drag
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