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（1 上海中森建筑與工程設(shè)計(jì)顧問有限公司，上海 200120；2 同濟(jì)大學(xué)土木工程防災(zāi)國家重點(diǎn)實(shí)驗(yàn)室, 上海 200092）

［摘要］基于高頻天平測(cè)力風(fēng)洞試驗(yàn)技術(shù)，在6種模擬湍流邊界層風(fēng)場(chǎng)中對(duì)12個(gè)不同長(zhǎng)細(xì)比及厚寬比的矩形截面超高層建筑模型的氣動(dòng)力進(jìn)行了測(cè)量，計(jì)算得到了各試驗(yàn)工況下的橫風(fēng)向氣動(dòng)力系數(shù)的導(dǎo)數(shù)，并分析了長(zhǎng)細(xì)比、厚寬比及來流風(fēng)場(chǎng)湍流強(qiáng)度對(duì)其的影響，同時(shí)給出了相應(yīng)的擬合公式。在此基礎(chǔ)上，進(jìn)一步分析了超高層建筑橫風(fēng)向準(zhǔn)定常氣動(dòng)阻尼比及馳振臨界風(fēng)速的變化規(guī)律。試驗(yàn)結(jié)果和分析結(jié)論可為超高層建筑的抗風(fēng)設(shè)計(jì)提供參考。

［關(guān)鍵詞］超高層建筑; 馳振; 橫風(fēng)向氣動(dòng)力系數(shù); 氣動(dòng)阻尼比; 馳振臨界風(fēng)速

中圖分類號(hào)：TU317      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：1002-848X(2014)19-0016-05

Wind tunnel test study on across-wind galloping stability of super tall buildings

Wu Di1,2, Quan Yong2, Gu Ming2

 (1 Shanghai Johnson Architectural & Engineering Designing Consultants Ltd., Shanghai 200120, China; 2 State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)

Abstract: Based on HFFB wind tunnel test technology, the aerodynamic force of twelve rectangular-section super tall building models with different slenderness ratios and thickness-width ratios in six simulated wind field with different turbulence intensities were tested. The derivatives of across-wind aerodynamic coefficients under different test load cases were calculated. The effects of slenderness ratios, thickness-width ratios and turbulence intensities on the differential coefficients of the across-wind aerodynamic coefficients on the wind direction angle were analyzed, and the relevant fitting equations were given. Based on this, further analysis of across-wind quasi-steady aerodynamic damping ratio and critical wind speed of galloping were made. Test results and analysis conclusions provide reference for the wind design of super tall buildings.

Keywords: super tall building; galloping; across-wind aerodynamic coefficient; aerodynamic damping ratio; critical wind speed of galloping

*國家自然科學(xué)基金項(xiàng)目（50878159）。

作者簡(jiǎn)介：吳迪，碩士研究生，Email：wudihao999@hotmail.com。

參考文獻(xiàn)

［1］梁樞果，顧明，霍偉廉. 高聳結(jié)構(gòu)馳振分析［J］. 振動(dòng)工程學(xué)報(bào), 1996, 9(3):244-252.

［2］MOLOS NOVAK. Galloping oscillations of prismatic structures.［J］. Journal of the Engineering Mechanics Division, 1972, 98(2): 27-46.

［3］張相庭. 高層建筑抗風(fēng)抗震分析計(jì)算［M］. 上海：同濟(jì)大學(xué)出版社, 1997.

［4］DEN HARTOG J P. Transmission line vibration due to sleet［J］. AIEE Transaction, 1932，51(4):1074-1086.

［5］盛煥明, 劉東, 李正良. 對(duì)結(jié)構(gòu)橫風(fēng)向馳振計(jì)算的改進(jìn)建議［J］. 重慶建筑大學(xué)學(xué)報(bào):自然科學(xué)版,2000(IS):185-188

［6］陳斌，全涌，顧明. 一實(shí)際高聳結(jié)構(gòu)的馳振穩(wěn)定性分析［C］//第17屆全國結(jié)構(gòu)工程學(xué)術(shù)會(huì)議論文集. 2008:297-300.

［7］DAVENPORT. Gust loading factors［J］. Journal of the Structural Division, ASCE, 1967，93(ST3):11-34.

［8］NOVAK M, TANSKA H. Effect of turbulence on galloping instability［J］. Journal of the Engineering Mechanics Division, 1974: 24-47.

［9］NAKAMURA Y. Recent research into bluff-body flutter［J］. Journal of Wind Engineering and Industrial Aerodynamics, 1990,33: 1-9.

［10］吳迪. 矩形截面高層建筑橫風(fēng)向馳振穩(wěn)定性研究［D］. 上海：同濟(jì)大學(xué),2012

［11］SUDA K, SATAKE N, ONO J, et al. Damping properties of buildings in Japan［J］. Journal of Wind Engineering and Industrial Aerodynamics, 1996, 59:383-392.