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(浙江綠城建筑設(shè)計(jì)有限公司， 杭州 310007)

［摘要］選取TTU建筑現(xiàn)場(chǎng)實(shí)測(cè)和剛性模型風(fēng)洞試驗(yàn)屋面風(fēng)壓數(shù)據(jù)作為比較標(biāo)準(zhǔn)，驗(yàn)證了CFD方法模擬低層大跨屋蓋表面平均風(fēng)壓的可靠性，并討論了湍流模型的選取對(duì)模擬結(jié)果的影響。在數(shù)值模擬中采用雷諾時(shí)均湍流模擬方法和RNG k-ε兩方程湍流模型，結(jié)合縮尺模型風(fēng)洞試驗(yàn)，研究了曲面大跨屋蓋表面風(fēng)壓分布。比較了有無(wú)背景建筑和正面是否開(kāi)洞等不同工況下，曲面大跨屋蓋內(nèi)、外壓分布的異同點(diǎn)，為該類(lèi)結(jié)構(gòu)抗風(fēng)設(shè)計(jì)提供了依據(jù)。

［關(guān)鍵詞］大跨屋蓋； 風(fēng)荷載； CFD數(shù)值模擬； 風(fēng)洞模型試驗(yàn)； 抗風(fēng)設(shè)計(jì) 

中圖分類(lèi)號(hào)： TU312.1 文獻(xiàn)標(biāo)識(shí)碼： A文章編號(hào)：  1002-848X(2016)S1-0974-07

Numerical simulation of mean wind load on long-span roof structure

Li Heng

(Zhejiang Greenton Architectural Design Co., Ltd., Hangzhou 310007, China)

Abstract: The reliability of computational fluid dynamics simulation of wind pressure on long-span roof structure was verified by comparison between the numerical simulation results, field measurement data and wind tunnel test results of TTU building. The accuracy of the simulation results by different turbulent models was studied. Based on the Reynolds Averaged Navier-Stokes method and RNG k-ε turbulent model, wind pressure distribution on a long-span roof with curved shape was calculated. The numerical simulation result is credible according to the wind tunnel test results of rigid model. Different characteristics of wind pressure distribution pattern on the curved roof are investigated in the presence or absence of cases of a back ground tall building and a front opening.

Keywords: long-span roof; wind load; computational fluid dynamics numerical simulation; wind tunnel test; wind-resistant design

作者簡(jiǎn)介: 李恒，碩士，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:liheng@gad.com.cn。