【摘要】：大跨度的鋼結(jié)構(gòu)連廊體型復(fù)雜屬于柔性結(jié)構(gòu),連廊的剛度遠小于兩側(cè)連接建筑物的剛度,放置于空中時抗風的設(shè)計非常重要。這種結(jié)構(gòu)在風荷載作用下非常敏感,同時復(fù)雜結(jié)構(gòu)與規(guī)則對稱的建筑在風壓系數(shù)上差別很大。因此,為保證結(jié)構(gòu)在施工和使用時更加安全,對大跨連廊鋼結(jié)構(gòu)在風載作用下的風壓分布規(guī)律的研究尤為重要。本文以阜新市“兩館一心”為研究背景,以規(guī)劃博物館和市民活動中心之間的大跨度空中連廊鋼結(jié)構(gòu)為研究對象。應(yīng)用ADINA有限元軟件建立結(jié)構(gòu)體和流體場的流體—結(jié)構(gòu)耦合(FSI)模型,分別對結(jié)構(gòu)的模態(tài)、不同風速工況和不同風荷載情況進行動力分析。計算得出在不同風荷載情況下的位移和風壓系數(shù)分布。通過以上研究工作,得出以下結(jié)論：(1)基于流體力學(xué),建立三種風速工況,在6個風向角作用下得到風壓系數(shù)等值線。風壓系數(shù)在結(jié)構(gòu)表面分布比較均勻,整體表現(xiàn)為迎風面受壓為正,其中中間部位最大,兩側(cè)逐漸減小,背風面風壓系數(shù)為負。(2)分析三種風速工況在不同風向角作用下結(jié)構(gòu)表面的風壓系數(shù)的分布。不同風速的風壓系數(shù)曲線表現(xiàn)為基本重合,推斷風壓系數(shù)分布與風速無關(guān),與風向角有關(guān)。同時進一步驗證了風壓系數(shù)求得的正確行和可靠性。(3)考慮狹縫效應(yīng)對連廊結(jié)構(gòu)的影響,分析不同荷載情況對結(jié)構(gòu)的平均風壓系數(shù)產(chǎn)生的影響。迎風面風壓值明顯增高,背風面的兩側(cè)風壓值變化較為明顯。
[Abstract]:The large span steel structure veranda is a flexible structure with complex shape. The stiffness of the corridor is much smaller than that of the connecting buildings on both sides. It is very important to design the wind-resistant structure when placed in the air. This kind of structure is very sensitive to wind load, and the complex structure is very different from the regular symmetrical building in wind pressure coefficient. Therefore, in order to ensure that the structure is more safe in construction and use, it is particularly important to study the wind pressure distribution law of long-span corridor steel structure under the action of wind load. This paper takes Fuxin City "two Pavilions as one mind" as the research background, takes the large-span steel structure of the aerial corridor between the planning museum and the citizen activity center as the research object. The fluid-structure coupled (FSI) model of structure and fluid field is established by using ADINA finite element software, and the dynamic analysis of the structure mode, different wind speed working condition and different wind load is carried out respectively. The distributions of displacement and wind pressure coefficient under different wind loads are calculated. The conclusions are as follows: (1) based on hydrodynamics, three wind speed conditions are established, and the isoline of wind pressure coefficient is obtained under the action of six wind direction angles. The distribution of wind pressure coefficient on the surface of the structure is more uniform, the overall performance is that the upwind surface is under positive pressure, the middle part of the wind pressure coefficient is the largest, and the two sides of the wind pressure coefficient decrease gradually. The wind pressure coefficient on the leeward surface is negative. (2) the distribution of the wind pressure coefficient on the structure surface under different wind direction angles is analyzed. The curve of wind pressure coefficient of different wind speed is basically coincident. It is inferred that the distribution of wind pressure coefficient is independent of wind speed and is related to wind direction angle. At the same time, the correctness and reliability of the wind pressure coefficient are further verified. (3) considering the influence of slit effect on the corridor structure, the influence of different loads on the average wind pressure coefficient of the structure is analyzed. The wind pressure on the upwind surface is obviously higher than that on the both sides of the leeward surface.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU393.3;TU312.1

【參考文獻】

相關(guān)期刊論文 前9條

1 閻超;于劍;徐晶磊;范晶晶;高瑞澤;姜振華;;CFD模擬方法的發(fā)展成就與展望[J];力學(xué)進展;2011年05期

2 丁陽;齊麟;趙奕程;朱黎蓬;;考慮屋面板自振效應(yīng)和流固耦合效應(yīng)的大跨度空間結(jié)構(gòu)風振系數(shù)[J];建筑結(jié)構(gòu)學(xué)報;2008年05期

3 楊偉;金新陽;顧明;陳素琴;;風工程數(shù)值模擬中平衡大氣邊界層的研究與應(yīng)用[J];土木工程學(xué)報;2007年02期

4 石娟,梁鵬飛,姚征,馬玉山,馬明軒,郭學(xué)寧;偏心蝶閥水力特性的數(shù)值模擬與分析[J];閥門;2004年05期

5 顧明 ,黃鵬 ,楊偉 ,汪大綏 ,周建龍;上海鐵路南站平均風荷載的風洞試驗和數(shù)值模擬[J];建筑結(jié)構(gòu)學(xué)報;2004年05期

6 喬愛科,伍時桂,劉有軍;彎曲動脈內(nèi)脈動流的有限元分析[J];北京工業(yè)大學(xué)學(xué)報;2001年02期

7 袁新明,毛根海,張土喬;閥門流道流場的數(shù)值模擬及阻力特性研究[J];水力發(fā)電學(xué)報;1999年04期

8 項海帆;結(jié)構(gòu)風工程研究的現(xiàn)狀和展望[J];振動工程學(xué)報;1997年03期

9 王美華,董勛;可控膜機械密封油膜壓力場的有限元分析[J];潤滑與密封;1993年06期

，

本文編號：2294355