884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

(1 保定建業(yè)集團(tuán)有限公司, 保定 071000; 2 中國(guó)廣核新能源控股有限公司, 北京 100070)

摘要: 下降風(fēng)作用會(huì)造成建筑表面風(fēng)荷載增大,當(dāng)其攜帶雪顆粒時(shí)會(huì)造成積雪效應(yīng),影響建筑功能正常使用、車(chē)輛人員出行乃至結(jié)構(gòu)安全. 采用數(shù)值仿真(CFD)方法進(jìn)行了鈍體建筑在下降風(fēng)作用下的積雪分布研究. 首先介紹了網(wǎng)格模型和數(shù)值方法基礎(chǔ)理論,通過(guò)建筑外形、網(wǎng)格類(lèi)型、網(wǎng)格數(shù)量、湍流模型和邊界條件,搭建鈍體建筑積雪分布研究數(shù)值模型;然后采用上述氣動(dòng)力分析數(shù)值平臺(tái)進(jìn)行不同來(lái)流下建筑周?chē)姆e雪分布數(shù)據(jù). 研究結(jié)果表明,盡管在山體背風(fēng)面設(shè)置建筑模型,下降風(fēng)夾雪效應(yīng)依舊十分顯著,特別是在風(fēng)向角變化條件下,積雪范圍、積雪高度以及建筑積雪荷載分布受到較大影響,相關(guān)研究結(jié)果能夠?yàn)橄陆碉L(fēng)條件下建筑功能和道路規(guī)劃提供基礎(chǔ)數(shù)據(jù)和依據(jù).

關(guān)鍵詞: 下降風(fēng); 風(fēng)夾雪; 數(shù)值仿真; 兩相流; 積雪效應(yīng); 積雪荷載

中圖分類(lèi)號(hào):TU312 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)12-0110-05

DOI:10. 19701 / j. jzjg. 20221057

Research on snow accumulations effects and snow loads distribution around a bluff building underkatabatic wind

LI Dan1, ZHANG Xuesen2

(1 Baoding Jianye Groups Co. , Ltd. , Baoding 071000, China;2 CGN New Energy Holdings Co. , Ltd. , Beijing 100070, China)

Abstract: The katabatic wind increases the wind loadings on the building surface. When it carries snow particles, it willcause snow effect, which would hind daily use, road travelling, and even structure safety. Computational fluid dynamics(CFD) method was adopted to study the snow distribution around bluff buildings under the katabatic wind. The mesh modeland the basic theory of numerical methods were firstly introduced. Based on the building shape, mesh schematics, gridnumbers, turbulence model and boundary conditions, a numerical model for snow distribution around bluff buildings was setup. Then the aerodynamic simulations were carried out to model the snow accumulations around the building under differentinflow directions. The results show that even the building model is set on the leeward side of the mountain, the effect ofkatabatic wind with snow is still very significant, especially under different approaching flows, the distributions of snowaccumulation, the height of snow accumulation and the snow loading distribution of the building are greatly affected. Therelevant results can provide basic data and guides for building functions and road plannings under katabatic wind.

Keywords:katabatic wind; wind-snow flow; numerical simulation; two-phase flow; snow effect; snow load

第一作者:李丹,學(xué)士,高級(jí)工程師,主要從事工業(yè)與民用建筑相關(guān)問(wèn)題分析、設(shè)計(jì)與施工,Email:106974733@ qq. com.

[引用本文] 李丹,張學(xué)森. 下降風(fēng)環(huán)境下鈍體建筑積雪效應(yīng)與積雪荷載分布研究[ J]. 建筑結(jié)構(gòu),2023,53(12):110-114. LI Dan,ZHANG Xuesen. Research on snow accumulations effects and snow loads distribution around a bluffbuilding under katabatic wind[J]. Building Structure,2023,53(12):110-114.