钢筋混凝土梁桥的加固方法与承载力分析-结构工程专业论文.docxVIP

贵州大 贵州大学硕士学位论文 万方数据 万方数据 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。 关键词 箱形梁桥；加固方法；粘贴钢板；弯矩；应力；Midas/Civil I Abstract In the bridge structure system, the most used is girder bridge. Prestressed concrete continuous box girder bridge, as a kind of beam bridge, it is mainly used for highway Bridges and cities.Box girder with good integrity and continuity and larger stiffness, but it also exists the girder crack, across the middle and lower scratching, etc Centered on the Wo Long bridge reinforcement, this paper has carried on the following work: summarizes the bridge diseases, mainly introduced the box girder cracks and the reason of lower scratching. summarizes the main reinforcement methods of bridge, expounds the mechanism of reinforcement reinforcement method and the applicable scope, the theory basis of pasting steel plate is introduced in detail. introduced the force analysis of the section, box, according to the appearance of the Wo Long bridge test results based on MIDAS/Civil analysis software to establish analysis model of continuous box girder bridge, it is concluded that the static characteristics, and main control section of the bridge bending moment, stress and displacement. Compared before and after reinforcement bridge on static characteristics, control section bending moment, the strengthening effect of the stress, displacement, etc, and make the bridge reinforcement effect assessment. taking the fracture process and paste the construction technology of the s