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［摘 要］對(duì)實(shí)際超高層建筑群進(jìn)行了群體和單體塔樓兩次同步測(cè)壓風(fēng)洞試驗(yàn)，通過(guò)兩次試驗(yàn)測(cè)量結(jié)果，考察風(fēng)向及塔樓位置對(duì)順、橫風(fēng)向和扭轉(zhuǎn)方向的主體結(jié)構(gòu)承受平均風(fēng)荷載的影響。同時(shí)，進(jìn)行了CFD數(shù)值模擬研究。通過(guò)試驗(yàn)結(jié)果與數(shù)值模擬結(jié)果的對(duì)比分析，驗(yàn)證了數(shù)值模擬的可靠性，結(jié)合風(fēng)壓試驗(yàn)結(jié)果及CFD計(jì)算結(jié)果對(duì)建筑群干擾效應(yīng)進(jìn)行了分析和干擾機(jī)理說(shuō)明。研究結(jié)果表明，對(duì)于建筑基底力而言數(shù)值模擬計(jì)算結(jié)果偏小，但是無(wú)量綱靜力干擾因子數(shù)值計(jì)算和試驗(yàn)結(jié)果符合得很好，數(shù)值模擬計(jì)算可以用于風(fēng)荷載干擾效應(yīng)的定性分析。處于中間位置的2號(hào)塔樓風(fēng)荷載靜力干擾效應(yīng)明顯，干擾放大作用顯著。
［關(guān)鍵詞］群體超高層建筑；同步測(cè)壓風(fēng)洞試驗(yàn)；數(shù)值模擬；靜力干擾效應(yīng)
中圖分類號(hào)：TU973.32 文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2011)11-0125-06
Numerical study and tests on wind-induced mean interference effects of staggered tall buildings
Yang Liguo, Tang Yi, Jin Xinyang(CABR Technology Co., Ltd., China Academy of Building Research, Beijing 100013, China)
Abstract:To research the interference effects of wind loads on a real project with three similar-shaped staggered tall buildings, wind tunnel tests about the three tall buildings and one isolated tower were conducted respectively. The mean pressure distributions in wind attacks were calculated through constructing appropriate CFD numerical models. Then the results of numerical prediction and the data of the wind tunnel test are compared, and it is found that they are in good agreement. Finally, comparison of the measured results, effects of wind directions and building positions on the design wind forces for main wind-force resisting system, i.e., along-wind, cross-wind and torsion wind loads, are discussed. Interference mechanisms were analyzed by integrating CFD simulated results and experiment measured data. It indicates that numerical simulation on wind-induced mean interference effects is appropriate by qualitative analysis. Wind loads of the middle tower, named tower 2, are greatly increased compared to isolated cases.
Keywords：tall buildings; synchronization pressure wind tunnel test; numerical simulation; static interference effect
作者簡(jiǎn)介：楊立國(guó)（1981-），男，工程師，研究方向：結(jié)構(gòu)風(fēng)工程,Email：ylgairx@tom.com。
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