凸角处理对弧边三角形高层建筑气动特性影响的研究
引用文献：
丁通 陈水福. 凸角处理对弧边三角形高层建筑气动特性影响的研究[J]. 建筑结构，2022，48（14）：109-114.
DING Tong CHEN Shuifu. Study on the influence of convex corner treatment on the aerodynamic characteristics of high-rise buildings with arc triangular section[J]. Building Structure，2022,48（14）：109-114.
摘要：利用刚性模型同步测压试验方法，对圆角弧边三角形和凸角弧边三角形高层建筑的气动特性进行了对比研究，探讨了凸角处理对此类建筑的平均和脉动风压分布、整体体型系数变化规律以及风荷载功率谱的影响。结果表明，凸角处理对弧边三角形建筑在不同迎风方式下的平均正风压影响较小，但能大幅降低不对称迎风时侧风面前缘处的平均负风压和脉动风压；还可有效减小顺风向整体体型系数对不同迎风方式的敏感性，明显削减其最不利值，但会增大不对称迎风时的横风向整体体型系数；凸角处理会增大横风向风荷载功率谱的有效带宽，明显降低此类建筑的漩涡脱落程度。
关键词：高层建筑；三角形截面；凸角处理；风洞试验；气动特性
基金：国家自然科学基金资助项目(50978230)。
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[4] MIYASHITA K,KATAGIRI J,NAKAMURA O,et al.Wind induced response of high rise building:effects of corner cuts or opening in square building[J].Journal of Wind Engineering and Industral Aerodynamics,1993,50:319.
[5] KAREEM A,KIJEWSKI T,TUMURA Y.Mitigation of motions of tall buildings with specific examples of recent applications[J].Wind and Structures,1999,2(3):201-251.
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[8] 庄翔，郑毅敏，郑晓芬，等.不同圆角率下矩形高层建筑风荷载特性[J].建筑结构学报，2018,39(S1):1-8.
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[2] KWOK K C S.Effects of building shape on wind-induced response of tall buildings[J].Journal of Wind Engineering and Industrial Aerodynamics,1988,28(1/2/3):381.
[3] MELBOURNE N H,CHEUNG J C K.Designing for serviceable accelerations in tall buildings[C]//Proceeding of the 4th International Conference on Tall Buildings.Singapore:World Scientific,1988:148-155.
[4] MIYASHITA K,KATAGIRI J,NAKAMURA O,et al.Wind induced response of high rise building:effects of corner cuts or opening in square building[J].Journal of Wind Engineering and Industral Aerodynamics,1993,50:319.
[5] KAREEM A,KIJEWSKI T,TUMURA Y.Mitigation of motions of tall buildings with specific examples of recent applications[J].Wind and Structures,1999,2(3):201-251.
[6] IRWIN P A,KILPATRICK J,ROBINSON,et al.Wind and tall buildings:negatives and positives[J].The Structural Design of Tall and Special Buildings,2008,17(3):913-925.
[7] 张正维，全涌，顾明，等.斜切角与圆角对方形截面高层建筑气动力系数的影响研究[J].土木工程学报，2013,46(9):12-20.
[8] 庄翔，郑毅敏，郑晓芬，等.不同圆角率下矩形高层建筑风荷载特性[J].建筑结构学报，2018,39(S1):1-8.
[9] 陈强，陈水福，史卓然，等.距布局双塔高层建筑风荷载特性研究[J].建筑结构，2019,49(14):126-130.
[10] VICKERY B J,CLARK W.Lift or across-wind response of tapered stacks[J].Journal of Structural Division,1972,98(1):1-20.
Study on the influence of convex corner treatment on the aerodynamic characteristics of high-rise buildings with arc triangular section
Abstract: The aerodynamic characteristics of high-rise buildings with arc triangular section of rounded corners and convex corners were compared by using the rigid model wind-tunnel synchronous pressure measurement method, and the influence of convex corner treatment on the average and fluctuating wind pressure distribution, the variation of global shape factors and wind-load power spectrum of such buildings were discussed. The results show that the convex corner treatment has little influence on the average positive wind pressure of the building with arc triangular section under different windward directions, but can greatly reduce the average negative wind pressure and fluctuating wind pressure at the front edge of the side face when asymmetric windward is encountered. It can also effectively reduce the sensitivity of the along-wind global shape factors to different windward directions, and obviously decrease the most unfavorable value of these factors, but increase the across-wind global shape factors when asymmetric windward is encountered. The convex corner treatment can increase the effective bandwidth of the across-wind wind load aerodynamic power spectrum and significantly reduce the vortex shedding of such buildings.
Keywords: high-rise building; triangular section; convex corner treatment; wind tunnel test; aerodynamic characteristic
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