钢筋混凝土梁桥的加固方法与承载力分析

发布时间：2018-01-18 08:27

本文关键词：钢筋混凝土梁桥的加固方法与承载力分析　出处：《贵州大学》2015年硕士论文　论文类型：学位论文

【摘要】：在桥梁结构系统中,使用最多的是梁桥。预应力连续箱梁桥,作为梁式桥的一种,主要用于城市和高速桥梁。箱梁具有良好的完整性、连续性和较大的刚度等优点,但它也存在着梁体开裂、跨中下挠等不足。本论文以卧龙桥的加固为中心,主要进行了如下工作:(1)阐述了梁桥存在的病害,主要介绍了箱梁的裂缝和跨中下挠病害及其原因。(2)介绍了梁桥常用的主要加固方法,阐述加固方法的加固机理和适用范围,详细介绍了粘贴钢板法加固的理论依据。(3)简要阐述了箱型截面的受力分析,根据卧龙桥的外观检测结果,基于MIDAS/Civil分析软件建立连续箱梁桥分析模型,得出其静力特性,以及旧桥主要控制截面的弯矩、应力、位移情况。对比加固前后桥梁在静力特性、控制截面的弯矩、应力、位移等方面的加固效果,并作出桥梁加固效果评价。(4)简要介绍了本文采取的裂缝处理方法及粘贴钢板施工工艺。论文从背景工程卧龙桥加固研究出发,较全面的探讨了梁式桥梁的病害成因及其影响因素、主要的加固方法的加固机理和适用范围、连续箱形梁桥的裂缝与跨中下挠的原因、粘贴钢板加固的理论计算依据、软件计算分析等一系列问题,并通过工程实例来体现和证明本论文的研究成果。本论文的研究成果对连续箱形桥梁的检测和加固上均有一定的参考意义。
[Abstract]:In the bridge structure system, the most used is the girder bridge. The prestressed continuous box girder bridge, as a kind of girder bridge, is mainly used in the city and high-speed bridges. The box girder has good integrity. The advantages of continuity and large stiffness, but it also has some shortcomings, such as beam cracking, mid-span deflection, etc. In this paper, the strengthening of Wolong Bridge as the center, the main work is as follows: 1) elaborated the existing diseases of the beam bridge. This paper mainly introduces the cracks of box girder and the disease of mid-span deflection and its causes. It introduces the main reinforcement methods commonly used in girder bridges, and expounds the reinforcement mechanism and applicable scope of the reinforcement methods. This paper introduces in detail the theoretical basis for strengthening by sticking steel plate.) the stress analysis of box section is briefly expounded, and according to the inspection results of the appearance of Wolong Bridge, the stress analysis of box section is briefly described. Based on MIDAS/Civil analysis software, the analysis model of continuous box girder bridge is established, and the static characteristics, bending moment and stress of the main control section of the old bridge are obtained. Displacement. Compare the static characteristics of the bridge before and after reinforcement, control the bending moment, stress, displacement and other aspects of the reinforcement effect. The paper briefly introduces the crack treatment method adopted in this paper and the construction technology of sticking steel plate. The paper starts from the research on the reinforcement of Wolong Bridge in the background engineering. The causes and influencing factors of the bridge diseases, the reinforcement mechanism and applicable scope of the main reinforcement methods, the causes of cracks and mid-span deflection of the continuous box girder bridge are discussed comprehensively. A series of problems, such as theoretical calculation basis, software calculation and analysis, etc. The research results of this paper have some reference significance for the detection and reinforcement of continuous box bridges.
【学位授予单位】：贵州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.72

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