大跨度钢桁梁桥滑移施工过程力学分析及监控实施

发布时间：2018-05-04 11:00

本文选题：钢桁梁桥 + 施工　；参考：《合肥工业大学》2017年硕士论文

【摘要】：近年来,我国大力发展铁路运输事业,钢桁梁桥越来越广泛的被应用于铁路桥梁建设中,其结构体系越来越新颖,形式也越加复杂。然而,钢桁梁结构施工过程中的事故也在不断增加,大跨度钢桁梁桥施工过程中施工监测技术的研究和应用成为结构安全施工的保障。本文以江西瑞九铁路工程桂竹林特大桥96m钢桁梁桥施工过程安全监控为研究背景,首先总结了国内外钢桁梁桥施工监控技术的发展及成就。然后介绍了钢结构施工过程中应力、变形以及施工环境等指标监测的主要方法和手段,并且对比和列举了最新应用实例。瑞九铁路工程桂竹林特大桥96m钢桁梁桥采用整体平移方法施工,为保证施工安全,本文分别建立了临时墩和滑道梁结构的力学分析模型,对其桥梁滑移施工工况进行了力学分析。采用有限元法计算了临时墩、滑道梁等施工辅助结构在关键施工过程中的应力和变形状态。同时采用现场力学试验监测辅助结构的高应力区,并对滑道梁力学分析模型、应力计算结果和试验结果进行了讨论与对比分析。最终,本文获得的各施工工况中钢桁梁构件的应力较大处实测值与有限元法计算值较吻合,并且桥梁施工成桥的线形符合设计要求和规范要求,保障了钢桁梁桥和辅助结构的施工安全和质量。
[Abstract]:In recent years, with the development of railway transportation in China, steel truss bridges are more and more widely used in the construction of railway bridges. The structure system is more and more novel and the form is more and more complex. However, the accidents in the construction of steel truss structures are also increasing. The research and application of construction monitoring technology in the construction process of large-span steel truss bridges become the guarantee of structural safety construction. Based on the research background of safety monitoring of 96m steel truss bridge in Jiangxi Ruijiu railway project, this paper summarizes the development and achievement of construction monitoring technology of steel truss bridge at home and abroad. Then it introduces the main methods and means of monitoring the stress, deformation and construction environment during the construction of steel structure, and compares and lists the latest application examples. The 96m steel truss girder bridge of Guizhulin super large bridge of Ruijiu railway project is constructed by the method of integral translation. In order to ensure the safety of construction, the mechanical analysis models of temporary piers and sliding beam structures are established in this paper. The mechanical analysis of the bridge slip construction condition is carried out. Finite element method is used to calculate the stress and deformation state of temporary pier, slide beam and other auxiliary structures in the key construction process. At the same time, the high stress zone of auxiliary structure is monitored by field mechanical test, and the mechanical analysis model, stress calculation result and test result of sliding track beam are discussed and compared. Finally, the measured values of the steel truss members under different construction conditions are in good agreement with the finite element method, and the alignment of the bridge construction meets the design requirements and the requirements of the code. The safety and quality of steel truss bridge and auxiliary structure are guaranteed.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U445.4

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