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凸角处理对弧边三角形高层建筑气动特性影响的研究
丁 通, 陈水福
摘 要

(浙江大学建筑工程学院, 杭州 310058)

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

中图分类号:TU973 文献标志码:A 文章编号:1002⁃848X(2022)14⁃0109⁃06

 

DOI:10􀆰 19701 / j􀆰 jzjg􀆰 20200662

 

Study on the influence of convex corner treatment on the aerodynamic characteristics of high⁃risebuildings with arc triangular section

DING Tong, CHEN Shuifu

(College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China)

Abstract: The aerodynamic characteristics of high⁃rise buildings with arc triangular section of rounded corners and convexcorners were compared by using the rigid model wind⁃tunnel synchronous pressure measurement method, and the influenceof convex corner treatment on the average and fluctuating wind pressure distribution, the variation of global shape factorsand wind⁃load power spectrum of such buildings were discussed. The results show that the convex corner treatment has littleinfluence on the average positive wind pressure of the building with arc triangular section under different windwarddirections,but can greatly reduce the average negative wind pressure and fluctuating wind pressure at the front edge of theside face when asymmetric windward is encountered. It can also effectively reduce the sensitivity of the along⁃wind globalshape factors to different windward directions, and obviously decrease the most unfavorable value of these factors, butincrease the across⁃wind global shape factors when asymmetric windward is encountered. The convex corner treatment canincrease the effective bandwidth of the across⁃wind wind load aerodynamic power spectrum and significantly reduce thevortex shedding of such buildings.

Keywords:high⁃rise building; triangular section; convex corner treatment; wind tunnel test; aerodynamic characteristic

∗国家自然科学基金资助项目(50978230)。

第一作者:丁通,硕士,主要从事结构风工程研究,Email: dingtong@ zju. edu. cn。

通信作者:陈水福,博士,教授,主要从事结构风工程研究,Email: csf@ zju. edu. cn。

[引用本文] 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,2022,52(14):109⁃114. DING Tong,CHEN Shuifu. Study on the influence of convex corner treatment on the aerodynamic characteristicsof high⁃rise buildings with arc triangular section[J]. Building Structure,2022,52(14):109⁃114.
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