- 摘 要
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(浙江大學(xué)建筑工程學(xué)院, 杭州 310058)
摘要: 利用剛性模型同步測壓試驗方法,對圓角弧邊三角形和凸角弧邊三角形高層建筑的氣動特性進(jìn)行了對比研究,探討了凸角處理對此類建筑的平均和脈動風(fēng)壓分布、整體體型系數(shù)變化規(guī)律以及風(fēng)荷載功率譜的影響。 結(jié)果表明,凸角處理對弧邊三角形建筑在不同迎風(fēng)方式下的平均正風(fēng)壓影響較小,但能大幅降低不對稱迎風(fēng)時側(cè)風(fēng)面前緣處的平均負(fù)風(fēng)壓和脈動風(fēng)壓;還可有效減小順風(fēng)向整體體型系數(shù)對不同迎風(fēng)方式的敏感性,明顯削減其最不利值,但會增大不對稱迎風(fēng)時的橫風(fēng)向整體體型系數(shù);凸角處理會增大橫風(fēng)向風(fēng)荷載功率譜的有效帶寬,明顯降低此類建筑的漩渦脫落程度。
關(guān)鍵詞: 高層建筑; 三角形截面; 凸角處理; 風(fēng)洞試驗; 氣動特性
中圖分類號:TU973 文獻(xiàn)標(biāo)志碼:A 文章編號: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
∗國家自然科學(xué)基金資助項目(50978230)。
第一作者:丁通,碩士,主要從事結(jié)構(gòu)風(fēng)工程研究,Email: dingtong@ zju. edu. cn。
通信作者:陳水福,博士,教授,主要從事結(jié)構(gòu)風(fēng)工程研究,Email: csf@ zju. edu. cn。
[引用本文] 丁通,陳水福. 凸角處理對弧邊三角形高層建筑氣動特性影響的研究[ J]. 建筑結(jié)構(gòu),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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