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（1 浙江綠城建筑設(shè)計(jì)有限公司，  杭州  310007；  2 浙江大學(xué)土木工程學(xué)系， 杭州 310058）

［摘要］通過(guò)剛性模型同步測(cè)壓風(fēng)洞試驗(yàn)得到菱形雙塔樓高層建筑各風(fēng)攻角下順風(fēng)向及橫風(fēng)向激勵(lì)，對(duì)其進(jìn)行譜變換及歸一化得到塔樓各測(cè)點(diǎn)層無(wú)因次氣動(dòng)力譜曲線。以各學(xué)者提出的層風(fēng)荷載功率譜數(shù)學(xué)模型為基礎(chǔ)采用最小二乘法對(duì)試驗(yàn)數(shù)據(jù)進(jìn)行擬合，分析得出雙塔樓對(duì)流場(chǎng)的相互擾動(dòng)使得塔樓在不同風(fēng)攻角下的氣動(dòng)力譜發(fā)生顯著變化；同時(shí)將擬合得到的順風(fēng)向氣動(dòng)力譜與基于風(fēng)速功率譜推導(dǎo)的結(jié)果進(jìn)行比較得出，受尾流干擾部分風(fēng)攻角下兩者差異較大；對(duì)橫風(fēng)向氣動(dòng)力譜構(gòu)成成分進(jìn)行分析得出，兩塔樓均存在部分風(fēng)攻角尾流渦脫落形成受抑制的情況，使得橫風(fēng)向氣動(dòng)力譜譜峰不明顯，帶寬較大。

［關(guān)鍵詞］高層建筑； 雙塔樓； 風(fēng)洞試驗(yàn)； 氣動(dòng)力譜

中圖分類號(hào)：TU973-2+13文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)05-0136-05

Research on aerodynamic spectra of diamond-shaped twin-tower tall building

Wang Xin1, Lou Wenjuan2, Fang Xunke1, Wu Yingdong1

(1 Zhejiang Greenton Architectural Design Co., Ltd., Hangzhou 310007, China； 2 Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China)

Abstract:The along-wind and cross-wind excitations of diamond-shaped twin-tower tall building at different wind angles of attack were obtained by synchronous pressure measurement wind tunnel tests of rigid models. The dimensionless aerodynamic spectrum curves of each measuring point layer of the tower were obtained by spectral transformation and reduction. Based on the mathematical model of layer wind load power spectrum proposed by various scholars, the least square method was used to fit the experimental data. It is concluded that the mutual disturbance of the two towers to the flow field makes the aerodynamic spectrum of the towers change remarkably at different wind attack angles. At the same time, the fitting aerodynamic spectrum along the wind direction is compared with the results derived from the wind speed power spectrum to conclude that the two towers are disturbed by wake flow. There is a big difference between them under partial wind attack angle. By analyzing the components of cross-wind aerodynamic spectrum, it is concluded that the wake vortex shedding at partial wind attack angle is restrained in both towers, which makes the peak of cross-wind aerodynamic spectrum not obvious and the bandwidth wider.

Keywords:tall building; twin-tower building; wind tunnel test; aerodynamic spectra

作者簡(jiǎn)介：王昕，博士，高級(jí)工程師，Email:bg5hot@gmail.com。