曲线钢箱梁桥顶推施工过程受力分析及成桥活载作用下的受力研究

发布时间：2018-06-19 06:31

本文选题：小半径 + 顶推法　；参考：《重庆交通大学》2014年硕士论文

【摘要】：在现代城市桥梁建设中,由于受到各种因素的限制,桥梁顶推施工方法以其独特的优势得到了广泛的运用。混凝土桥在顶推施工方面已得出了比较完善的受力计算方法,而对钢桥顶推施工受力分析方面的研究则相对较少,且对于小半径曲线钢箱梁桥设计缺乏相应的指导规范。因此有必要对钢箱梁顶推施工中的受力和变形进行研究。本文主要对钢箱梁顶推施工中主梁的受力和变形进行分析研究,其次分析了成桥阶段活载作用下对支座的影响。①本文首先简单介绍了研究内容的依托工程,简述了桥梁顶推施工方案、顶推施工关键问题以及顶推横向导向纠偏问题。依据曲线钢箱梁顶推施工仿真分析的结果得到了影响顶推施工安全的关键因素,并提出了三种监控措施。②运用桥梁分析软件MIDAS/Civil 2010模拟了钢箱梁桥顶推施工过程并对其进行了仿真受力分析,对钢箱梁的受力特性和变形做了较全面的分析。③通过建立不同的荷载工况,模拟在成桥运营阶段各种不利因素对桥梁的影响,分析计算了钢箱梁的内力和变形,通过各支座反力来了解曲线钢箱梁的倾覆稳定性,结果表明：选择合理支座布置形式有利于减小桥梁受不利荷载的影响。
[Abstract]:In the modern urban bridge construction, due to the constraints of various factors, the bridge pushing construction method has been widely used for its unique advantages. In the aspect of jacking and pushing construction of concrete bridge, a relatively perfect calculation method of force has been obtained, but the research on force analysis of steel bridge jacking construction is relatively few, and the design of steel box girder bridge with small radius curve is short of corresponding guidance standard. Therefore, it is necessary to study the force and deformation of steel box girder in pushing construction. In this paper, the force and deformation of the main girder in the jacking construction of the steel box girder are analyzed and studied. Secondly, the influence of the live load on the bearing in the stage of the bridge is analyzed. 1 this paper firstly introduces the supporting engineering of the research content. This paper briefly describes the bridge pushing construction scheme, the key problems of the jacking construction and the correction of the lateral orientation of the jacking. According to the result of the simulation analysis of the curve steel box girder jacking construction, the key factors affecting the safety of the jacking construction are obtained. At the same time, three kinds of monitoring measures .2 are put forward to simulate the construction process of steel box girder bridge by using Midas / Civil 2010 software, and the simulation force analysis is carried out to the steel box girder bridge. The stress characteristics and deformation of steel box girder are analyzed comprehensively. 3. By establishing different load working conditions, the influence of various unfavorable factors on the bridge in the operation stage of the bridge is simulated, and the internal force and deformation of the steel box girder are analyzed and calculated. The overturning stability of curved steel box girder is understood by the reaction force of each support. The results show that the selection of reasonable support arrangement is beneficial to reduce the influence of adverse loads on the bridge.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.462

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