空腹式圬工拱桥加固方法研究

发布时间：2018-02-07 14:03

本文关键词： 空腹式圬工拱桥病害分析加固方法主拱圈对比分析　出处：《西南交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：在我国现有桥梁中,空腹式圬工拱桥数量仍然很大,这相当多的一部分修建于60～70年代。桥梁在长期运营过程中由于缺乏必要的养护、交通量增加及交通荷载等级逐渐提高等不利因素影响,导致桥梁结构材料老化、损伤,结构发生变形,许多空腹式圬工拱桥变成了危桥。这些危桥不但阻碍了道路技术等级的提升,而且严重危及到了道路通行安全。所以,对这些仍然承担着道路通行功能的空腹式圬工拱桥进行加固,提高其承载能力、排除安全隐患使之不再成为道路畅通的绊脚石迫在眉睫。论文主要研究内容包括：(1)结合四川省凉山州普通国省干线公路桥梁检查情况,对其中的空腹式圬工拱桥产生的病害进行整理归类,分析病害产生的原因、总结病害特点。(2)以中江县继光桥为工程背景,根据其检测评定结果,提出钢筋混凝土套箍封闭主拱圈法、拱腹条带式外包法和拱背外包加固法三种不同的加固方法。(3)建立加固前与采用三种不同加固方法加固后的有限元模型,得到加固前后桥梁的受力状况。(4)对比分析三种加固方法加固后的桥梁受力状况,比选出最优的加固方法。同时,对三种加固方法进行综合对比为以后类似的加固工程提供参考。
[Abstract]:In the existing bridge in our country, the number of open spandrel arch bridge is still large, the considerable part of the construction in the 60~70's. The Bridge in long-term operation process due to the lack of necessary maintenance, increased traffic and traffic load increases and other unfavorable factors, leading to aging, the bridge structure material damage, deformation structure. Many hollow masonry arch bridge into a dangerous bridge. These bridges not only hinder the technical level of road improvement, but also seriously endanger traffic safety. Therefore, the hollow masonry arch bridge still bears the traffic function of strengthening, improve its carrying capacity, eliminate security risks so as not to become a stumbling block to the smooth road the imminent. The main contents of this thesis include: (1) according to the Sichuan Prefecture of Liangshan Province ordinary national and provincial trunk highways bridge inspection, on the hollow masonry The diseases caused by the arch bridge are classified to analyze the causes of diseases and summarize the disease characteristics. (2) in Zhongjiang County, Ji Guang bridge as the engineering background, according to the test results, the reinforced concrete hoop closed main arch method, arch strip method and arch outsourcing outsourcing reinforcement method three different strengthening methods. (3) the establishment of reinforcement before and using three different finite element method for stabilizing the model, get the stress status before and after the reinforcement of the bridge. (4) comparative analysis of three kinds of reinforcement methods of bridge reinforcement after the stress condition, the optimal reinforcement method. At the same time, three kinds of comprehensive comparison the reinforcement method provides a reference for the later similar reinforcement projects.

【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.72

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