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（1 中衡設(shè)計(jì)集團(tuán)股份有限公司， 蘇州 215021； 2 江蘇省生態(tài)建筑與復(fù)雜結(jié)構(gòu)工程技術(shù)研究中心， 蘇州 215021）

［摘要］計(jì)算風(fēng)工程作為風(fēng)洞試驗(yàn)的補(bǔ)充技術(shù)，已得到越來(lái)越多的應(yīng)用，但是使用RNS方法進(jìn)行非定常計(jì)算精度低，而大渦模擬可對(duì)大尺度漩渦直接求解，可以得到較精確的模擬結(jié)果。因此對(duì)超高層建筑進(jìn)行了多工況的CFD大渦模擬，研究不同風(fēng)向角下建筑表面風(fēng)荷載的變化規(guī)律，并與風(fēng)洞試驗(yàn)結(jié)果進(jìn)行對(duì)比，簡(jiǎn)要闡述了建筑體型對(duì)風(fēng)荷載的影響。將大渦模擬得到的非定常風(fēng)壓時(shí)程作為結(jié)構(gòu)激勵(lì)，采用頻域法計(jì)算高層建筑的隨機(jī)振動(dòng)響應(yīng)，根據(jù)慣性風(fēng)荷載方法，求解結(jié)構(gòu)的等效靜力風(fēng)荷載，并與風(fēng)洞試驗(yàn)結(jié)果進(jìn)行對(duì)比。對(duì)比分析表明，大渦模擬技術(shù)可以很好地模擬建筑表面風(fēng)荷載，并可以克服測(cè)點(diǎn)布置、不同步測(cè)試帶來(lái)的系統(tǒng)誤差；頻域法分析得到的等效靜力風(fēng)荷載與風(fēng)洞試驗(yàn)結(jié)果基本一致，可以將本文方法計(jì)算得到的風(fēng)荷載作為設(shè)計(jì)依據(jù)。

［關(guān)鍵詞］大渦模擬； 超高層建筑； 等效靜力風(fēng)荷載； 頻域法； 風(fēng)洞試驗(yàn)； 風(fēng)振響應(yīng)

中圖分類(lèi)號(hào)：TU312-1, TU317-1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2016)20-0016-06

Windinduced response analysis of super high-rise building based on large eddy simulation

Yang Lülei1,2, Wang Yixiang1,2, Gong Minfeng1,2

(1 ARTS Group Co., Ltd., Suzhou 215021, China； 2 Jiangsu Engineering Institute of Ecological Building & Complex Structure, Suzhou 215021, China)

Abstract:Computational Wind Engineering (CWE) as a complement to wind tunnel test has been more and more applied. Although the accuracy of unsteady RNS calculation is very low, large eddy simulation (LES) can directly solve large-scale vortices. It is easy to get more accurate simulation results. A series of LES by CFD of high-rise building were carried out to study the changing rule of wind loads at different wind angles. The wind tunnel test results and numerical simulation results were compared to explain the effects of building shape. To calculate the random vibration response of high-rise buildings, frequency domain method (FDM) was implemented. And the unsteady wind pressure time-history data which were obtained from LES was used as structural loads. Based on structural response and the concept of inertial wind load, the equivalent static wind load (ESWL) can be calculated which was compared with wind tunnel test results. Comparative analysis shows that the wind load can be accurately obtained from the LES which can overcome some systematic errors caused by measuring points and non-simultaneous testing. And ESWL based on LES and FDM is basically identical with that obtained from wind tunnel test, which, therefore, can be used as wind loads for design.

Keywords:large eddy simulation; super high-rise building; equivalent static wind load; frequency domain method; wind tunnel test; wind-induced response

作者簡(jiǎn)介：楊律磊，碩士，工程師，Email：yanglvlei@artsgroup.com。