大跨连续钢箱梁桥大节段吊装施工控制研究

发布时间：2018-03-06 05:17

本文选题：大跨度　切入点：连续钢箱梁　出处：《浙江大学》2014年硕士论文　论文类型：学位论文

【摘要】：连续钢箱梁桥具有抗弯刚度大、抗扭刚度大等优点,同时又具有钢结构强度高、自重轻、跨越能力大、工期短等优点,且外形优美,因此越来越受到重视。大节段吊装施工技术由于灵活、施工效率高,随着施工技术的发展而应用越来越多。随着连续钢箱梁跨度不断增大,制造技术、定位技术、线形控制等要求也随之提高,施工难度越来越大,桥梁施工过程的控制也越发重要。本文以港珠澳大桥非通航孔6×110m连续钢箱梁为背景,介绍了大节段吊装施工方法并提出了此种方法施工控制的重难点,制定了相应的线形和应力监控方案。同时,根据薄壁钢箱梁的特点,阐述了剪切变形对此种桥梁变形的影响,并基于Timoshenko两广义位移的深梁理论,选取了胡海昌教授提出的剪切修正系数计算公式计算,并建立板壳单元验证了其正确性。在对剪切变形讨论的基础上,本文采用考虑剪切变形的有限元模型对港珠澳大桥的施工过程进行了模拟,给出了各个施工阶段的挠度和应力值,同时利用变形结果对预拱度进行了设置,并详细说明钢箱梁制造线形、安装线形、梁端转角的计算方法并提出误差修正方法。对吊装架设定位时的支座预设偏移量进行了讨论计算,并分析了影响因素。接着又对挠度、应力、吊装梁端夹角的参数敏感性进行了分析,分析的参数包括：弹性模量、容重、局部温差,为施工控制的误差分析提供依据。同时,根据首跨吊装的实测数据,分析计算了结构变形、应力、温度效应,与理论计算值进行对比,为后续施工提供依据。本文为港珠澳大桥非通航孔桥的施工控制提供了理论依据,为大节段吊装的类似桥梁的施工控制提供了参考。
[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.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4

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