【摘要】：波形鋼腹板組合箱梁橋是一種將混凝土與鋼板有效結(jié)合起來的新橋型，因結(jié)構(gòu)輕型美觀、受力明確等長(zhǎng)處，顯得應(yīng)用前景非常良好。限于目前國(guó)內(nèi)研究應(yīng)用較少，所以設(shè)計(jì)施工水平有待進(jìn)一步的提高。在分析總結(jié)了前人相關(guān)研究成果和國(guó)內(nèi)外各種施工設(shè)計(jì)相關(guān)規(guī)范的基礎(chǔ)上，本文通過ANSYS分析計(jì)算和理論經(jīng)驗(yàn)公式的分析，研究了波形鋼腹板組合箱梁橋的腹板穩(wěn)定性問題。主要完成工作如下： 一、本文先回顧了波形鋼腹板的發(fā)展和應(yīng)用歷程，并梳理了波形鋼腹板的穩(wěn)定性計(jì)算基礎(chǔ)理論公式，分別從波形鋼腹板局部屈曲強(qiáng)度計(jì)算、整體屈曲強(qiáng)度計(jì)算和合成屈曲強(qiáng)度計(jì)算三個(gè)方面進(jìn)行闡述，總結(jié)了在線彈性情況和非線性情況下的經(jīng)驗(yàn)計(jì)算公式，，并用不同算例進(jìn)行計(jì)算比較，得出各主要計(jì)算公式計(jì)算精度的差異。 二、本文在理論公式計(jì)算的基礎(chǔ)上，利用ANSYS建立波形鋼腹板箱梁的空間模型，在線彈性情況下進(jìn)行了特征值屈曲分析，模型尺寸參考蘭州市雁白黃河大橋和其它已建橋梁尺寸，建立模型分析了波形鋼腹板板厚、波高、波折角度、直板長(zhǎng)度、腹板高度和橫隔板間距變化對(duì)其屈曲模態(tài)和屈曲極限荷載的影響，并分析總結(jié)其規(guī)律，與理論值進(jìn)行比較。 三、本文在特征值屈曲分析的前提下，繼續(xù)利用ANSYS非線性屈曲分析功能，計(jì)入波形鋼腹板的初始幾何缺陷、材料塑性、幾何非線性和大變形效應(yīng)等，用弧長(zhǎng)法對(duì)波形鋼腹板箱梁橋的腹板進(jìn)行了全程屈曲響應(yīng)分析。在非線彈性情況下對(duì)波形鋼腹板的主要幾何構(gòu)造參數(shù)和橫隔板間距變化對(duì)其屈曲模態(tài)和屈曲極限荷載的影響進(jìn)行研究與分析，總結(jié)其變化規(guī)律，并對(duì)屈曲后性能也進(jìn)行了分析研究和評(píng)價(jià)。 四、對(duì)線彈性分析結(jié)果和非線性分析結(jié)果進(jìn)行分析比較，并結(jié)合理論公式分析比較得出線彈性和非線性計(jì)算結(jié)果的差別。 本文通過對(duì)波形鋼腹板組合箱梁橋的腹板穩(wěn)定性進(jìn)行了線彈性和非線性分析研究，分析了不同幾何構(gòu)造尺寸時(shí)腹板屈曲后性能的差異，希望能為同類型橋梁的設(shè)計(jì)和施工提供一定的理論參考。
[Abstract]:The corrugated steel web composite box girder bridge is a new type of bridge which combines concrete and steel plate effectively. Because of the advantages of light and beautiful structure and clear force, the application prospect is very good. Limited to domestic research and application, so the level of design and construction needs to be further improved. Based on the analysis and summary of previous research results and various construction design codes at home and abroad, this paper studies the web stability of composite box girder bridges with corrugated steel webs by means of ANSYS analysis and theoretical empirical formula analysis. The main works are as follows: firstly, the development and application of the corrugated steel web are reviewed, and the basic theoretical formulas for the stability calculation of the corrugated steel web are presented. The local buckling strength of the corrugated steel web is calculated respectively. Three aspects of global buckling strength calculation and composite buckling strength calculation are described. The empirical formulas for on-line elastic and nonlinear cases are summarized and compared with different examples. The difference of calculation accuracy between the main formulas is obtained. Secondly, on the basis of theoretical formula calculation, the spatial model of corrugated steel web box girder is established by using ANSYS, and the eigenvalue buckling analysis is carried out under the condition of on-line elasticity. The model size refers to the dimensions of Yanbai Yellow River Bridge and other bridges that have been built in Lanzhou City. The influence of the thickness of corrugated steel web plate, wave height, corrugated angle, length of straight plate, the height of web plate and the spacing of transverse spacer on the buckling mode and ultimate buckling load are analyzed and summarized, and compared with the theoretical values. Thirdly, on the premise of eigenvalue buckling analysis, the ANSYS nonlinear buckling analysis function is used to take into account the initial geometric defects, material plasticity, geometric nonlinearity and large deformation effects of corrugated steel web. The buckling response of the web of the corrugated steel web box girder bridge is analyzed by arc length method. In the case of non-linear elasticity, the effects of the main geometric construction parameters and the spacing of transverse spacers on the buckling modes and ultimate buckling loads of corrugated steel web are studied and analyzed, and the variation rules are summarized. The post-buckling performance is also analyzed and evaluated. Fourthly, the results of linear elastic analysis and nonlinear analysis are analyzed and compared, and the difference between linear elasticity and nonlinear calculation results is obtained by combining theoretical formula analysis. In this paper, the linear elastic and nonlinear analysis of web stability of corrugated steel web composite box girder bridge is carried out, and the difference of web buckling performance with different geometric dimensions is analyzed. Hope to provide some theoretical reference for the design and construction of the same type of bridge.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U441;U448.213

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 陳寶春,黃卿維;波形鋼腹板PC箱梁橋應(yīng)用綜述[J];公路;2005年07期

2 宋建永,任紅偉,聶建國(guó);波紋鋼腹板剪切屈曲影響因素分析[J];公路交通科技;2005年11期

3 王福敏,周長(zhǎng)曉,張長(zhǎng)青;波形腹板箱梁鋼腹板穩(wěn)定試驗(yàn)研究[J];公路交通技術(shù);2003年05期

4 陳寶春;陳宜言;林松;;波形鋼腹板橋梁應(yīng)用調(diào)查分析[J];中外公路;2010年01期

5 單成林;;波形鋼腹板預(yù)應(yīng)力梁橋體外索參數(shù)有限元分析[J];華南理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2006年04期

6 蔡千典，冉一元;波形鋼腹板預(yù)應(yīng)力結(jié)合箱梁結(jié)構(gòu)特點(diǎn)的探討[J];橋梁建設(shè);1994年01期

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