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首页> 外文学位 >Investigation experimentale et theorique sur la performance de poutres en beton arme renforcees en cisaillement a l'aide de composites en PRF ancres.
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Investigation experimentale et theorique sur la performance de poutres en beton arme renforcees en cisaillement a l'aide de composites en PRF ancres.

机译：复合FRP锚杆对钢筋混凝土梁抗剪性能的试验和理论研究。

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摘要

Buildings around the world are aging, which increases the demands for structural strengthening. From economic point of view, it is obviously untenable to replace all deficient structures. As an alternative, strengthening is an option to keep such structures safe. Several methods have been developed to strengthen deteriorated buildings, in particular, the use of composite materials. It is often necessary to pay a great attention to the shear capacity of reinforced concrete beams because of the catastrophic nature of shear failures. Indeed, shear failure is more complex compared to the other failure of a reinforced concrete beam. The current research focuses in this point. For proper management and optimization of global research in shear strengthening of reinforced concrete beams, the ETS team has developed a software tool for data collection. The database established allows researchers to identify areas of lack of research. The second phase of this study is to conduct a test program of this new technique for shear strengthening that uses FRP composite material in the form of bars injected into the beam web. The second phase is carried out with the following objectives: 1. Evaluate the effectiveness of the method by comparing it to the near surface mounted technique (NSM); 2. Investigate the influence of the presence of internal steel stirrups; 3.Estimate the effects on the spacing between the internal cracks. Based on the results of this investigation, the new technique is very promising. It shows its superiority in terms of efficiency compared to the NSM method, especially when there are no steel stirrups to ensure a first line of defence against the shear force. The new method is found to increase the efficiency by 122% ETS.;Keywords: Reinforced concrete beams, shear, strengthening, FRP, NSM
机译：世界各地的建筑物都在老化，这增加了对结构加固的需求。从经济角度来看，替换所有缺陷结构显然是站不住脚的。作为替代，加强是保持此类结构安全的一种选择。已经开发出几种方法来加强恶化的建筑物，特别是使用复合材料。由于剪切破坏的灾难性性质，通常必须非常注意钢筋混凝土梁的剪切能力。确实，与钢筋混凝土梁的其他破坏相比，剪切破坏更为复杂。当前的研究集中在这一点上。为了正确管理和优化钢筋混凝土梁抗剪加固的全球研究，ETS团队开发了一种数据收集软件工具。建立的数据库使研究人员能够确定缺乏研究的领域。这项研究的第二阶段是进行一项新的剪切增强技术的测试程序，该技术使用了注入到梁腹中的钢筋形式的FRP复合材料。第二阶段的目标如下：1.通过与近表面安装技术（NSM）进行比较，评估该方法的有效性； 2.研究内部钢箍筋的影响； 3.估计对内部裂缝间距的影响。根据这项调查的结果，这项新技术很有希望。与NSM方法相比，它在效率方面显示出优越性，尤其是在没有钢箍筋以确保抵抗剪切力的第一道防线时。发现该新方法可将ETS效率提高122％。关键字：钢筋混凝土梁，剪切，加强，FRP，NSM

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  • 作者

    Langnel, Matthieu.;

  • 作者单位

    Ecole de Technologie Superieure (Canada).;

  • 授予单位 Ecole de Technologie Superieure (Canada).;
  • 学科 Engineering Civil.
  • 学位 M.Ing.
  • 年度 2010
  • 页码 131 p.
  • 总页数 131
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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