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An experimental study of different factors affecting the bond of NSM FRP bars in concrete

机译：影响混凝土中NSM FRP筋粘结的不同因素的试验研究

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摘要

Near-surface mounted (NSM) fiber reinforced polymer (FRP) reinforcement has proven to be an efficient technique for strengthening concrete members. The bond behavior of the NSM system depends on the bond in the two existing interfaces, while the response in terms of load-slip curves and load capacity may be strongly affected by many other parameters. As a consequence of the variety of factors affecting the bond, different studies into the behavior of NSM FRP reinforcement have been carried out in recent years. In this paper, an experimental study is performed in which the effect of adhesive properties, bar type, bar size, FRP properties, groove geometry and the use of mechanical interlocking on the capacity and bond behavior of a NSM joint is investigated. The failure load, average bond stress, loaded end slip, free end slip, transverse strains (on adhesive and concrete), and the mode of failure for the tested joints are reported and discussed. The results show that the adhesive properties, FRP bar size and bar surface treatment were critical factors in the capacity and mode of failure of the specimens tested.
机译：已证明近表面安装（NSM）纤维增强聚合物（FRP）增强是一种用于增强混凝土构件的有效技术。 NSM系统的键合行为取决于两个现有接口中的键合，而负载滑动曲线和负载能力方面的响应可能会受到许多其他参数的强烈影响。由于影响粘合的因素多种多样，近年来对NSM FRP增强行为进行了不同的研究。在本文中，进行了一项实验研究，其中研究了粘合性能，条型，条尺寸，FRP性能，沟槽几何形状以及使用机械互锁对NSM接头的容量和粘合行为的影响。报告并讨论了失效载荷，平均粘结应力，载荷端滑移，自由端滑移，横向应变（在粘合剂和混凝土上）以及测试接头的失效模式。结果表明，粘合性能，FRP棒材尺寸和棒材表面处理是影响试样性能和破坏方式的关键因素。

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  • 来源
    《Composite Structures》 |2013年第5期|350-365|共16页
  • 作者

    I.A. Sharaky; L. Torres; M. Baena; C. Mias;

  • 作者单位

    AMADE, Polytechnic School, University of Girona, Campus Montilivi s, 17071 Cirona, Spain,Materials Engineering Dept, Faculty of Engineering, Zagazig University, B.O. Box 44519, Zagazig, Sharkia, Egypt;

    AMADE, Polytechnic School, University of Girona, Campus Montilivi s, 17071 Cirona, Spain;

    AMADE, Polytechnic School, University of Girona, Campus Montilivi s, 17071 Cirona, Spain;

    AMADE, Polytechnic School, University of Girona, Campus Montilivi s, 17071 Cirona, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    near-surface mounted (NSM); fiber reinforced polymer (FRP); bond; pull-out tests; adhesives;

    机译：近表面安装（NSM）;纤维增强聚合物（FRP）;键;拔出测试;胶粘剂;

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