本文選題：曲線梁橋　切入點：橫向爬移　出處：《鄭州大學(xué)》2015年碩士論文

【摘要】：曲線梁橋憑借其占地面積小、外觀優(yōu)美、線形靈活布置等優(yōu)點在現(xiàn)代交通應(yīng)用中占據(jù)重要位置,特別是在立交橋中應(yīng)用較多。但隨著曲線梁橋的增多,曲線梁橋的病害也逐漸凸顯,特別是曲線梁橋的橫向“爬移”時有發(fā)生,給交通帶來了安全隱患。本文以某互通式立交匝道橋為實例,建立其有限元計算模型,分析曲線梁橋發(fā)生橫向偏移的原因,提出相應(yīng)的病害處治措施。本文完成的主要研究內(nèi)容:1.依托實橋,分別采用Midas/Civil有限元軟件建立梁單元模型和Ansys有限元軟件建立實體單元模型,通過對比兩個模型在自重作用下的豎向撓度以及在預(yù)應(yīng)力荷載和自重共同作用下的橫向位移、徑向位移,論證了使用Ansys有限元軟件建立模型的可靠性。2.以某互通式立交匝道橋為研究對象,分析了曲線梁橋在內(nèi)、外在因素影響下的橫向偏位效應(yīng),其中內(nèi)在因素包括曲率半徑、支承形式、墩柱高度等,外在因素包括自重、預(yù)應(yīng)力荷載、汽車荷載、溫度、混凝土收縮徐變等。通過對比分析各因素的影響效應(yīng),得出曲率半徑是引起該曲線梁橋橫向“爬移”的主要內(nèi)在因素,溫度效應(yīng)是影響該曲線梁橋發(fā)生橫向“爬移”的主要外在因素,為該曲線梁橋的橫向“爬移”處治措施提供依據(jù)。3.綜述了曲線梁橋發(fā)生橫向偏位的預(yù)防措施和處治措施,并結(jié)合本文依托工程實例的實際橋梁病害,提出了該曲線梁橋發(fā)生病害后的加固改造措施。
[Abstract]:Curved girder bridge occupies an important position in modern traffic application with its advantages of small area, beautiful appearance and flexible arrangement of line shape, especially in overpass bridge. But with the increase of curved girder bridge, The disease of curved girder bridge is becoming more and more prominent, especially the lateral "climb and move" of curved girder bridge occurs from time to time, which brings safety trouble to traffic. In this paper, taking an interchange ramp bridge as an example, the finite element calculation model is established. This paper analyzes the reason of lateral deviation of curved girder bridge, and puts forward the corresponding measures to deal with the disease. The main research content of this paper is: 1. The beam element model is established by Midas/Civil finite element software and the solid element model is established by Ansys finite element software. By comparing the vertical deflection of the two models under the action of self-gravity and the lateral displacement under the joint action of prestressed load and deadweight, the model is established. Radial displacement, the reliability of establishing model with Ansys finite element software is demonstrated. Taking an interchange ramp bridge as an object of study, the lateral deflection effect of curved girder bridge is analyzed under the influence of external factors. The internal factors include radius of curvature, form of support, height of pier and so on. External factors include weight, prestressed load, vehicle load, temperature, shrinkage and creep of concrete, etc. It is concluded that the radius of curvature is the main internal factor that causes the lateral "climbing" of the curved girder bridge, and the temperature effect is the main external factor that affects the lateral "climb" of the curved girder bridge. This paper provides the basis for the lateral "climbing and moving" treatment measures of the curved girder bridge. The preventive measures and the treatment measures for the lateral deviation of the curved girder bridge are summarized, and the actual bridge diseases based on the engineering examples in this paper are discussed. The reinforcement and reconstruction measures of the curved girder bridge after the disease occurred are put forward.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U448.42

【參考文獻】

相關(guān)期刊論文 前3條

1 楊黨旗;華強立交A匝道獨柱曲線梁橋病害分析及加固[J];橋梁建設(shè);2003年02期

2 賈文杰;;連續(xù)彎梁橋支座平面合理布置和構(gòu)造措施[J];山西交通科技;2010年04期

3 譚萬忠,張佐漢,柯在田;平面曲線梁橋溫度變形與支承體系布置探討[J];鐵道建筑;2005年04期

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