發(fā)布時間：2018-04-28 22:35

  本文選題：波形鋼腹板 + 剪應(yīng)力分布　； 參考：《鄭州大學》2014年碩士論文

【摘要】：波形鋼腹板預(yù)應(yīng)力混凝土組合箱梁橋是一種新型組合結(jié)構(gòu)橋梁，現(xiàn)有對波形鋼腹板抗剪特性的研究通常只是進行簡單定性的描述，偏保守地認為波形鋼腹板承擔截面上的全部剪力，混凝土頂?shù)装宀粎⑴c承剪，但是這與波形鋼腹板箱梁結(jié)構(gòu)實際受力狀態(tài)有差異。本文依托武西高速公路桃花峪黃河大橋跨大堤橋工程，建立有限元模型，對波形鋼腹板的剪力傳遞效率展開研究，主要工作內(nèi)容及結(jié)論如下。 1.總結(jié)波形鋼腹板組合梁橋的發(fā)展概況，明確其技術(shù)特點，對國內(nèi)外相關(guān)研究現(xiàn)狀進行綜述。國外研究主要集中在波形鋼腹板的抗剪屈曲和極限承載力等方面，國內(nèi)則側(cè)重于對其靜力特性方面的研究，并對其剪力傳遞做了一些定性的描述，然而這些研究大都是針對等截面小跨度簡支梁進行的，對于大跨度變截面組合連續(xù)梁橋的研究較少。 2.結(jié)合武西高速公路桃花峪黃河大橋跨大堤橋，分別應(yīng)用Midas/Civil和Midas/FEA建立該橋的空間梁單元和實體單元有限元模型，將僅在自重和預(yù)應(yīng)力作用下兩種軟件的計算結(jié)果進行對比分析，，結(jié)果表明兩種模型的計算結(jié)果趨近一致，可以作為后續(xù)剪力傳遞效率數(shù)值分析的理論模型。 3.以Midas/FEA實體模型為基礎(chǔ)，選取主梁代表性截面，考慮自重單獨作用、自重和預(yù)應(yīng)力共同作用及滿布活載三種荷載工況，分析混凝土頂?shù)装搴筒ㄐ武摳拱逯械募袅鬟f情況，數(shù)據(jù)表明變截面效應(yīng)下彎矩和軸力產(chǎn)生的附加剪應(yīng)力對腹板剪應(yīng)力分布影響較大，使得在梁高增加時波形鋼腹板的承剪比下降，混凝土頂?shù)装宄屑舴蓊~增加，這與等截面波形鋼腹板簡支箱梁橋的剪力傳遞效率存在明顯差異。 4.推導變截面波形鋼腹板箱梁剪應(yīng)力計算公式，將其與FEA模型數(shù)值解和依據(jù)等截面剪應(yīng)力計算公式所得的計算結(jié)果進行對比，驗證公式的正確性。
[Abstract]:Corrugated steel web prestressed concrete composite box girder bridge is a new type of composite structure bridge. It is considered conservatively that the corrugated steel webs bear all the shear force on the section and the concrete top and bottom slab does not participate in the shear but this is different from the actual stress state of the corrugated steel web box girder structure. Based on the project of Taohuayu Yellow River Bridge of Wuxi Expressway, the finite element model is established to study the shear transfer efficiency of the corrugated steel web. The main contents and conclusions are as follows. 1. This paper summarizes the development of corrugated steel web composite girder bridge, clarifies its technical characteristics, and summarizes the related research status at home and abroad. The research abroad mainly focuses on the shear buckling and ultimate bearing capacity of the corrugated steel web plate, while the domestic research focuses on its static characteristics, and makes some qualitative description of its shear transfer. However, most of these researches are aimed at small span simple supported beams with equal cross-section, but there are few researches on long-span composite continuous beam bridges with variable cross-section. 2. The finite element models of spatial beam element and solid element of the bridge are established by using Midas/Civil and Midas/FEA in combination with the bridge across the main embankment of Taohuayu Yellow River Bridge of Wuxi Expressway. The calculation results of the two kinds of software only under the action of self-weight and prestress are compared and analyzed. The results show that the calculated results of the two models are consistent and can be used as a theoretical model for numerical analysis of shear transfer efficiency. 3. Based on the Midas/FEA solid model, this paper selects the representative section of the main beam, and analyzes the shear force transfer in the concrete roof and bottom slab and the corrugated steel web, considering the single action of the deadweight, the joint action of the deadweight and the prestress and the full load condition. The data show that the additional shear stress caused by bending moment and axial force has a great influence on the distribution of web shear stress, which makes the shear ratio of corrugated steel web plate decrease with the increase of beam height, and the shear share of concrete roof and bottom slab increases. There is a significant difference between the shear transfer efficiency and the shear transfer efficiency of the equal-section corrugated steel web simply supported box girder bridge. 4. The formula for calculating shear stress of corrugated steel box girder with variable section is deduced and compared with the numerical solution of FEA model and the calculation result based on the formula of equal section shear stress. The correctness of the formula is verified.
【學位授予單位】：鄭州大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U441;U448.213

【參考文獻】

相關(guān)期刊論文 前10條

1 胡旭輝;顧安邦;徐君蘭;;波形鋼腹板箱梁橋設(shè)計方法探討[J];重慶交通學院學報;2006年06期

2 尹航;劉保東;任紅偉;;波紋鋼腹板混凝土箱梁的動力特性分析[J];工程抗震與加固改造;2008年02期

3 吳文清,葉見曙,萬水,胡成;波形鋼腹板-混凝土組合箱梁截面變形的擬平截面假定及其應(yīng)用研究[J];工程力學;2005年05期

4 張元海;李喬;;變截面梁的應(yīng)力計算及其分布規(guī)律研究[J];工程力學;2007年03期

5 李淑琴;陳建兵;萬水;陳華利;;我國幾座波形鋼腹板PC組合箱梁橋的設(shè)計與建造[J];工程力學;2009年S1期

6 李淑琴;孫天明;萬水;;某波形鋼腹板天橋設(shè)計方法研究[J];公路;2010年03期

7 李宏江,萬水,葉見曙;波形鋼腹板PC組合箱梁的結(jié)構(gòu)特點[J];公路交通科技;2002年03期

8 李立峰;劉志才;王芳;;波形鋼腹板組合箱梁彈性階段彎曲理論及模型試驗研究[J];公路交通科技;2008年01期

9 李淑琴;朱高波;萬水;;某黃河大橋主橋上部結(jié)構(gòu)有限元靜力分析[J];公路交通科技;2009年04期

10 王福敏,周長曉,張長青;波形鋼腹板箱梁承載能力試驗研究[J];公路交通技術(shù);2001年02期

本文編號：1817208