本文關(guān)鍵詞： 曲線連續(xù)剛構(gòu)橋 橋墩 扭轉(zhuǎn)角 預(yù)拱度 橋梁施工監(jiān)控 有限元分析　出處：《長沙理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著我國橋梁施工技術(shù)的不斷成熟,大跨度橋梁越來越多,對(duì)于施工中的監(jiān)控問題也越來越重視。本文以炎汝高速33標(biāo)段某大橋?yàn)槔?研究分析大跨度曲線連續(xù)剛構(gòu)橋橋墩偏位和扭轉(zhuǎn)角對(duì)橋梁合龍的影響。本文首先描述目前的橋梁發(fā)展概況和施工能力現(xiàn)狀,以及施工控制的基本原理。然后通過分析各個(gè)荷載工況下橋墩偏位、合龍段兩端在y軸方向的位移以及扭轉(zhuǎn)角,得出此曲線橋監(jiān)控可以不考慮扭轉(zhuǎn)角的影響。并且通過與直線橋?qū)Ρ确治?得出此曲線連續(xù)剛構(gòu)橋施工監(jiān)控可以參照直線橋的方法來施行。最后通過工程實(shí)例來實(shí)施橋梁監(jiān)控的全過程,通過建立有限元模型,得出位移的變化趨勢(shì),求出預(yù)拱度,得出應(yīng)力應(yīng)變理論值,從而指導(dǎo)施工。使合龍誤差和應(yīng)力誤差在合理的范圍之內(nèi),使曲線連續(xù)剛構(gòu)橋能夠安全平順的合龍。通過對(duì)橋墩偏位和中跨合龍段兩端位移細(xì)致的研究,得出橋墩偏位擬合公式以及扭轉(zhuǎn)角對(duì)合龍的影響,可以更好的控制線形和受力,為以后的橋梁監(jiān)控提供參考。
[Abstract]:With the development of bridge construction technology in China, more and more long-span bridges have been built, and more and more attention has been paid to the monitoring problems in construction. The influence of pier deflection and torsion angle on bridge closure of long-span curved continuous rigid frame bridge is studied and analyzed. And the basic principle of construction control. Then, by analyzing the deflection of bridge pier under various load conditions, the displacement and torsion angle of both ends of closure section in the direction of y axis, It is concluded that the influence of torsion angle can not be taken into account in the monitoring of the curved bridge. It is concluded that the construction monitoring of continuous rigid frame bridge with this curve can be carried out by referring to the method of straight bridge. Finally, the whole process of bridge monitoring is carried out through engineering examples, and the change trend of displacement is obtained by establishing the finite element model, and the pre-arch degree is obtained. The theoretical values of stress and strain are obtained to guide the construction. The closure error and stress error are within a reasonable range, and the curved continuous rigid frame bridge can be safely and smoothly closed. Through the detailed study on the deflection of piers and the displacement of the two ends of the middle span closure section, The formula of bridge pier deviation fitting and the effect of torsion angle on closure can better control the linear shape and force and provide reference for the bridge monitoring in the future.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445.559;U448.23

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