本文選題：弧形內(nèi)凹大跨屋蓋 + 風(fēng)洞試驗(yàn)��； 參考：《西安建筑科技大學(xué)學(xué)報(bào)(自然科學(xué)版)》2016年05期

【摘要】：對(duì)弧形內(nèi)凹大跨鋼屋蓋航站樓結(jié)構(gòu)的風(fēng)荷載特性進(jìn)行了風(fēng)洞試驗(yàn)研究,得到屋蓋平均和脈動(dòng)風(fēng)壓系數(shù),結(jié)構(gòu)分區(qū)體型系數(shù).理論分析采用基于Reynolds時(shí)均的RNG k-ε湍流模型,通過(guò)FLUENT軟件對(duì)結(jié)構(gòu)在部分風(fēng)向角下的三維定常風(fēng)場(chǎng)進(jìn)行了數(shù)值模擬,分別從風(fēng)壓系數(shù)分布、分區(qū)體型系數(shù)變化和風(fēng)速矢量圖等方面進(jìn)行詳細(xì)研究,并與風(fēng)洞試驗(yàn)結(jié)果對(duì)比分析.結(jié)果表明:風(fēng)洞試驗(yàn)和數(shù)值模擬結(jié)果吻合良好,兩者可相互驗(yàn)證.屋蓋結(jié)構(gòu)均承受風(fēng)吸力作用,氣流在迎風(fēng)區(qū)域分離后形成的漩渦作用將使局部產(chǎn)生較大的負(fù)壓區(qū).屋蓋上挑檐進(jìn)行開(kāi)洞處理,以及在挑檐下部設(shè)置導(dǎo)流板,可以有效減小其所受風(fēng)荷載作用.
[Abstract]:In this paper, wind tunnel test is carried out to study the wind load characteristics of the steel roof terminal structure with arc-shaped concave large span steel roof. The mean and fluctuating wind pressure coefficients of the roof and the shape coefficient of the structure are obtained.In this paper, the RNG k- 蔚 turbulence model based on Reynolds time average is used to simulate the three-dimensional steady wind field of the structure at partial wind direction by FLUENT software, and the distribution of wind pressure coefficient is obtained respectively.The variation of area shape coefficient and wind speed vector chart were studied in detail, and compared with the results of wind tunnel test.The results show that the results of wind tunnel test and numerical simulation are in good agreement with each other.The roof structure is subjected to wind suction and the vortex formed after the windward separation will result in a large negative pressure region.The roof roof roof with roof roof roof with roof roof roof can be effectively reduced by wind load as well as by setting a diversion plate in the lower part of the roof.
【作者單位】： 長(zhǎng)安大學(xué)建筑工程學(xué)院;
【基金】：陜西省工業(yè)攻關(guān)項(xiàng)目(2014K06-23) 陜西省青年科技新星項(xiàng)目(2016KJXX-51) 陜西省建設(shè)廳建設(shè)科技計(jì)劃項(xiàng)目(2014-K14)
【分類(lèi)號(hào)】：TU312.1

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本文編號(hào)：1774194