本文選題：大跨度　切入點(diǎn)：連續(xù)鋼箱梁　出處：《浙江大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：連續(xù)鋼箱梁橋具有抗彎剛度大、抗扭剛度大等優(yōu)點(diǎn),同時(shí)又具有鋼結(jié)構(gòu)強(qiáng)度高、自重輕、跨越能力大、工期短等優(yōu)點(diǎn),且外形優(yōu)美,因此越來越受到重視。大節(jié)段吊裝施工技術(shù)由于靈活、施工效率高,隨著施工技術(shù)的發(fā)展而應(yīng)用越來越多。隨著連續(xù)鋼箱梁跨度不斷增大,制造技術(shù)、定位技術(shù)、線形控制等要求也隨之提高,施工難度越來越大,橋梁施工過程的控制也越發(fā)重要。 本文以港珠澳大橋非通航孔6×110m連續(xù)鋼箱梁為背景,介紹了大節(jié)段吊裝施工方法并提出了此種方法施工控制的重難點(diǎn),制定了相應(yīng)的線形和應(yīng)力監(jiān)控方案。同時(shí),根據(jù)薄壁鋼箱梁的特點(diǎn),闡述了剪切變形對(duì)此種橋梁變形的影響,并基于Timoshenko兩廣義位移的深梁理論,選取了胡海昌教授提出的剪切修正系數(shù)計(jì)算公式計(jì)算,并建立板殼單元驗(yàn)證了其正確性。 在對(duì)剪切變形討論的基礎(chǔ)上,本文采用考慮剪切變形的有限元模型對(duì)港珠澳大橋的施工過程進(jìn)行了模擬,給出了各個(gè)施工階段的撓度和應(yīng)力值,同時(shí)利用變形結(jié)果對(duì)預(yù)拱度進(jìn)行了設(shè)置,并詳細(xì)說明鋼箱梁制造線形、安裝線形、梁端轉(zhuǎn)角的計(jì)算方法并提出誤差修正方法。對(duì)吊裝架設(shè)定位時(shí)的支座預(yù)設(shè)偏移量進(jìn)行了討論計(jì)算,并分析了影響因素。接著又對(duì)撓度、應(yīng)力、吊裝梁端夾角的參數(shù)敏感性進(jìn)行了分析,分析的參數(shù)包括：彈性模量、容重、局部溫差,為施工控制的誤差分析提供依據(jù)。同時(shí),根據(jù)首跨吊裝的實(shí)測數(shù)據(jù),分析計(jì)算了結(jié)構(gòu)變形、應(yīng)力、溫度效應(yīng),與理論計(jì)算值進(jìn)行對(duì)比,為后續(xù)施工提供依據(jù)。 本文為港珠澳大橋非通航孔橋的施工控制提供了理論依據(jù),為大節(jié)段吊裝的類似橋梁的施工控制提供了參考。
[Abstract]:Continuous steel box girder bridge has the advantages of high flexural stiffness and torsional stiffness, high strength of steel structure, light weight, large span capacity, short construction period, etc. Therefore, more and more attention has been paid to the construction technology of large segment hoisting, because of its flexibility, high construction efficiency and more and more applications with the development of construction technology. With the continuous steel box girder span increasing, manufacturing technology, positioning technology, The requirements of linear control are also increased, the construction is becoming more and more difficult, and the control of bridge construction process is becoming more and more important. Based on the 6 脳 110m continuous steel box girder of Hong Kong-Zhuhai-Macao Bridge, this paper introduces the construction method of large segment hoisting, puts forward the heavy and difficult points of the construction control of this method, and formulates the corresponding linear and stress monitoring scheme. According to the characteristics of thin-walled steel box girder, the influence of shear deformation on the deformation of this kind of bridge is expounded. Based on the theory of deep beam with two generalized displacements of Timoshenko, the formula for calculating shear correction coefficient proposed by Professor Hu Haichang is selected. The plate and shell element is established to verify its correctness. Based on the discussion of shear deformation, the finite element model considering shear deformation is used to simulate the construction process of Hongzhou-Zhuhai-Macao Bridge, and the deflection and stress values of each construction stage are given. At the same time, the pre-arch is set by the deformation result, and the steel box girder is described in detail. The calculation method of the angle of the beam end and the method of error correction are put forward. The preset offset of the support is discussed and calculated, and the influencing factors are analyzed. Then, the deflection, the stress, the stress, the deflection, the stress, the deflection, the stress, the deflection, the stress, the deflection and the stress are analyzed. The sensitivity of the parameters of the angle between the hoisting beams is analyzed. The parameters include elastic modulus, bulk density, local temperature difference, which provide the basis for the error analysis of the construction control. At the same time, according to the measured data of the first span hoisting, The deformation, stress and temperature effect of the structure are analyzed and calculated, which provides the basis for the subsequent construction. This paper provides the theoretical basis for the construction control of the non-navigable hole bridge of the HongKong-Zhuhai-Macao Bridge, and provides a reference for the construction control of the similar bridge with large section hoisting.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U445.4

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本文編號(hào)：1573481