现浇曲线箱梁病害分析及维修加固工程应用

发布时间：2018-01-12 15:02

本文关键词：现浇曲线箱梁病害分析及维修加固工程应用　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：近年来随着曲线现浇箱梁桥的大范围应用，加之一些曲梁桥诸如温度、偏心等问题的认识不足以及可能存在的超载，混凝土受拉易开裂的特点致使曲线梁桥的病害大量出现。为此，开展混凝土曲线箱梁桥的病害分析以及维修加固技术的研究是一项十分有意义的工作。首先，以高赞大桥西引道与纵五线交叉点处，，包括A、B、C、D、E、F、G、H共八条匝道为依托工程，调查该桥梁病害状况，分析产生原因，明确病害产生的机理。其次，根据依托工程病害状况进行加固设计计算分析，以调整扭矩分配作为桥梁加固的首要目的，运用Midas Civil建立了有限元模型，对加固前后结构的承载能力、刚度及稳定性进行了计算对比分析，形成合理的加固设计方案。最后，提出了依托工程的加固设计施工方案及关键施工工艺。总之，通过混凝土曲线箱梁桥的病害分析以及维修加固技术，提出适合曲线箱梁桥的关键加固技术及加固方法，能够为现浇曲线箱梁桥的加固、新建设计及施工提供技术支持和理论基础。
[Abstract]:In recent years, with the wide application of curved cast-in-situ box girder bridges, coupled with some curved girder bridges such as temperature, eccentricity and other problems of understanding and possible overload. The crack of concrete subjected to tension leads to a large number of diseases of curved girder bridge. Therefore, it is very meaningful to study the disease analysis of concrete curved box girder bridge and the technique of maintenance and reinforcement. First of all, based on the eight ramps at the intersection of the West approach Road and the Fifth Longitudinal Route of the Gaozan Bridge, including the eight ramps, the disease situation of the bridge is investigated and the causes are analyzed. Clarify the mechanism of disease. Secondly, according to the condition of the engineering diseases, the finite element model is established by using Midas Civil to calculate and analyze the reinforcement design, and to adjust the torque distribution as the primary purpose of the bridge reinforcement. The load-bearing capacity, stiffness and stability of the structure before and after reinforcement are calculated and analyzed, and a reasonable design scheme is formed. Finally, the reinforcement design and construction scheme and key construction technology are put forward. In a word, through the disease analysis of the concrete curved box girder bridge and the maintenance and strengthening technology, the key reinforcement technology and strengthening method suitable for the curved box girder bridge are put forward, which can be used to strengthen the cast-in-place curved box girder bridge. New design and construction to provide technical support and theoretical basis.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.7

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