三塔干擾下冷卻塔的風荷載和風致響應分析
鮑侃袁
- 摘 要
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（浙江大學建筑設計研究院， 杭州 310028）［摘要］根據(jù)某擬建的大型雙曲冷卻塔實際尺寸按照1∶300的比例制作了剛性模型，在其外表面沿高度由上至下布置5道環(huán)向測層，每層36個測點，將其放在邊界層風洞中進行三塔干擾試驗。測試結果表明，在三塔受風荷載作用時，前塔的阻擋作用明顯，后塔的時均風力顯著減小，但脈動風壓卻明顯增大，使得極值干擾系數(shù)增大。同時得到了極值干擾系數(shù)最大時的響應干擾系數(shù)，給出了考慮三塔干擾的工程設計的干擾系數(shù)建議值。［關鍵詞］大型雙曲冷卻塔； 風荷載； 三塔干擾； 風致響應； 干擾系數(shù)中圖分類號：TU312+.1 文獻標識碼：A 文章編號：1002-848X(2013)15-0091-06Analysis of wind load and wind-induced response of three large hyperbolic cooling towersBao Kanyuan(Architectural Design and Research Institute of Zhejiang University, Hangzhou 310028, China)Abstract: The wind-tunnel experiments of rigid model of large hyperbolic cooling towers based on 1∶300 scale was carried out. The five test hoops were disposed from top to bottom, each hoop has 36 test points along the circle. The results show that the wind-pressure of the tower in the rear is seriously influenced by its front tower, the average part of wind-pressure on rear tower is relatively smaller, but the fluctuation part is relatively larger compared to the situation of isolated tower, so the maximum of wind-pressure which is the sum of average part and fluctuation part is relatively larger. The coefficients of wind-pressure and structural response of rear tower under influence of front towers is proposed for structural design.Keywords: large hyperbolic cooling tower; wind load; three towers; wind-induced response; interference coefficient作者簡介：鮑侃袁，工學博士，工程師,Email: beckham8@zju.edu.cn。參考文獻［1］ARMIT J. Wind loading on cooling towers［J］. Journal of the Structural Division, ASCE, 1980, 106(ST3): 623-641.［2］NIEMANN H J, KOPPER H D. Influence of adjacent buildings on wind effects on cooling towers［C］//Wittek & Kratzig. 4th international symposium on natural draught cooling towers. Balkema, Rotterdam. 1996: 83-91.［3］KAREEM A, KIJEWSKI T, LU P C. Investigation of interference effects for a group of finite cylinders［J］. Journal of Wind Engineering and Industrial Aerodynamics, 1998, 77-78: 503-520.［4］趙林, 宋錦忠, 高玲,等. 冷卻塔群塔剛體測壓試驗研究［J］. 試驗流體力學, 2007, 21(2): 56-62.［5］GB/T 50102—2003. 工業(yè)循環(huán)水冷卻設計規(guī)范［S］. 北京: 中國計劃出版社,2003.［6］SUN T F, ZHOU L M. Wind pressure distribution around a ribless hyperbolic cooling tower［J］. Journal of Wind Engineering and Industrial Aerodynamics, 1983, 14(1-3):181-192.［7］鮑侃袁. 大型雙曲冷卻塔的風荷載和風致響應理論分析與試驗研究［D］. 杭州：浙江大學, 2009.［8］周良茂,李培華.兩個鄰近全尺寸雙曲冷卻塔風壓分布的測量［J］.氣動實驗與測量控制,1992,6(3):37-44.
