【摘要】：近年來,輕鋼結(jié)構(gòu)因其巨大的經(jīng)濟(jì)優(yōu)勢(shì)、良好的抗震及節(jié)能環(huán)保性能,已被廣泛應(yīng)用于低層和多層房屋中。由于雙向梁難于制造,節(jié)點(diǎn)構(gòu)造復(fù)雜,傳統(tǒng)輕鋼龍骨結(jié)構(gòu)的樓面梁均為單向密布的實(shí)腹梁或桁(剛)架構(gòu)成。這種單向梁體系構(gòu)造簡(jiǎn)單,但僅沿墻的一個(gè)方向設(shè)置,墻體單方向受力,不能充分發(fā)揮墻體的承載力,且梁截面較高,剛度相對(duì)較小。 本文提出了一種新型的輕鋼結(jié)構(gòu)樓面梁體系—由單向桁架梁相互交叉連接而成的雙向桁架體系。其中桁架梁的上下弦桿為口40×20×1.2Imn的冷彎薄壁矩形鋼管,腹桿是標(biāo)準(zhǔn)的Z字型連接件,由φ25的圓管在端部沖壓再折彎制作而成。腹桿與上下弦桿和梁與梁之間通過自攻螺絲或者螺栓連接。 論文詳細(xì)介紹了格構(gòu)輕鋼雙向梁的材料、構(gòu)成、制作和安裝方法并總結(jié)了其特點(diǎn)；對(duì)相同規(guī)格尺寸的3m×3m跨的雙向梁和單向梁分別進(jìn)行了豎向均布荷載下的承載力試驗(yàn),敘述了試驗(yàn)的裝置,過程和荷載加載方法,測(cè)得了其在各級(jí)荷載下典型位置的應(yīng)變和撓度,得到它們的極限承載力和破壞模態(tài),作出了荷載—位移曲線和荷載—應(yīng)變曲線圖,并進(jìn)行了對(duì)比；利用有限元軟件非線性分析得到了雙向、單向梁的力學(xué)性能、撓度、破壞模態(tài)和承載力等。試驗(yàn)與有限元分析結(jié)果有一定的差異,文中分析了其原因。通過本文分析結(jié)果表明此種格構(gòu)輕鋼雙向梁體系的撓度較大,但可以用在一些承擔(dān)荷載小的輕鋼房屋樓面或者屋面中。 最后,本文給出了一些格構(gòu)輕鋼雙向梁體系試驗(yàn)和理論研究的改進(jìn)建議,為今后此類結(jié)構(gòu)體系的實(shí)際工程設(shè)計(jì)提供一些依據(jù)和未來的研究方向提供了參考。
[Abstract]:In recent years, light steel structure has been widely used in low-rise and multi-storey buildings because of its great economic advantages, good seismic and energy-saving and environmental protection performance. Because the two-way beam is difficult to manufacture and the joint structure is complex, the floor beam of the traditional light steel keel structure is composed of one-way dense solid web beam or truss (rigid) frame. The structure of the one-way beam system is simple, but only along one direction of the wall, the unidirectional force of the wall can not give full play to the bearing capacity of the wall, and the beam section is higher and the stiffness is relatively small. In this paper, a new type of light steel structure building surface beam system, which is composed of unidirectional truss beams intersecting with each other, is proposed. The upper and lower chord of the truss beam is a cold-formed thin-wall rectangular steel pipe with a mouth of 40 脳 20 脳 1.2Imn, and the web is a standard Z-shaped connector, which is made of 蠁 25 circular pipe stamping and bending at the end. The web is connected to the upper and lower chord and the beam to the beam by tapping screws or bolts. In this paper, the material, composition, manufacture and installation method of lattice light steel bidirectional beam are introduced in detail, and its characteristics are summarized. The bearing capacity tests of bidirectional beams and unidirectional beams with the same specification size of 3m 脳 3m span under vertical uniform load are carried out respectively. the test device, process and load loading method are described. the strain and deflection of typical positions under various loads are measured, their ultimate bearing capacity and failure mode are obtained, and the load-displacement curve and load-strain curve are made and compared. The mechanical properties, deflection, failure mode and bearing capacity of bidirectional and unidirectional beams are obtained by nonlinear analysis of finite element software. There is a certain difference between the experimental results and the finite element analysis results, and the reasons are analyzed in this paper. The results of this paper show that the deflection of the lattice light steel two-way beam system is large, but it can be used in the floor or roof of some light steel houses with small load. Finally, some suggestions for improving the test and theoretical research of lattice light steel two-way beam system are given, which provides some references for the practical engineering design of this kind of structure system in the future and the future research direction.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU392.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉建平;鋼管相貫節(jié)點(diǎn)的研究現(xiàn)狀和動(dòng)向[J];鋼結(jié)構(gòu);2003年04期

2 戴雅萍;趙宏康;;蘇州國(guó)際博覽中心鋼結(jié)構(gòu)樓面設(shè)計(jì)[J];鋼結(jié)構(gòu);2005年06期

3 楊霞;;中國(guó)國(guó)家博物館改擴(kuò)建工程雙層鋼桁架施工技術(shù)[J];鋼結(jié)構(gòu);2011年08期

4 金昌成;;冷彎型鋼屈服強(qiáng)度計(jì)算公式的探討[J];冶金建筑;1982年03期

5 秦杰;徐瑞龍;覃陽(yáng);徐亞柯;高恒;李振寶;;國(guó)家體育館雙向張弦結(jié)構(gòu)預(yù)應(yīng)力施工模型試驗(yàn)研究[J];工業(yè)建筑;2007年01期

6 周斌;楊衛(wèi)星;;型鋼混凝土井字梁在地鐵車站中的應(yīng)用[J];工程建設(shè)與設(shè)計(jì);2012年12期

7 陳厚載;;鍍鋅鋼管生產(chǎn)的發(fā)展方向[J];鋼管技術(shù);1988年01期

8 楊曉光;鋼筋混凝土井式樓蓋結(jié)構(gòu)的設(shè)計(jì)[J];河北煤炭;2002年01期

9 陳以一,陳揚(yáng)驥;鋼管結(jié)構(gòu)相貫節(jié)點(diǎn)的研究現(xiàn)狀[J];建筑結(jié)構(gòu);2002年07期

10 聶建國(guó);卜凡民;;單、雙向鋼-混凝土組合樓蓋對(duì)比分析及設(shè)計(jì)建議[J];建筑結(jié)構(gòu);2011年01期

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