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Flexural behavior of RC beams strengthened by NSM GFRP Bars having different end conditions

机译：NSM GFRP筋增强钢筋混凝土梁的受弯性能

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摘要

Near surface mounted (NSM) fiber reinforced polymer (FRP) bars became more effective in strengthening reinforced concrete (RC) beams. This is because it increases the bond capacity and makes a protection against external damage. Most of previous related researches stated that the failure of the tested RC strengthened beams with NSM FRP is due to debonding or concrete cover separation. In this research the ends of the NSM glass fiber reinforced polymer (GFRP) bars were bent to delay or prevent NSM FRP debonding and concrete cover separation and thus increasing the load carrying capacity of the strengthened beams. The inclination angles of GFRP bars with bent ends were 90 degrees and 45 degrees. Straight GFRP bars with variable lengths were also used for comparison. The test results demonstrated that the GFRP bars with bent ends prevented the concrete cover separation and increased the load carrying capacity of the strengthened beams. The load carrying capacity of the strengthened beams by straight NSM bars and those having 45 degrees and 90 degrees inclined ends were 177%, 201%, and 185% of that of their control beam, respectively. (C) 2016 Published by Elsevier Ltd.
机译：近表面安装（NSM）纤维增强聚合物（FRP）钢筋在增强钢筋混凝土（RC）梁方面变得更加有效。这是因为它增加了粘合能力，并提供了防止外部损坏的保护。先前的大多数相关研究表明，使用NSM FRP的已测试RC加固梁的失败是由于脱胶或混凝土表皮分离所致。在这项研究中，将NSM玻璃纤维增​​强聚合物（GFRP）棒的端部弯曲以延迟或防止NSM FRP脱粘和混凝土覆盖层分离，从而增加了加固梁的承载能力。端部弯曲的GFRP钢筋的倾斜角度分别为90度和45度。可变长度的直GFRP钢筋也用于比较。试验结果表明，带有弯曲端部的GFRP筋可以防止混凝土表层分离，并提高了加固梁的承载能力。直的NSM筋和具有45度和90度倾斜端的钢筋的承载梁的承载能力分别是其控制梁的承载能力的177％，201％和185％。 （C）2016由Elsevier Ltd.出版

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  • 来源
    《Composite Structures》 |2016年第7期|131-142|共12页
  • 作者

    Reda R. M.; Sharaky I. A.; Ghanem M.; Seleem M. H.; Sallam H. E. M.;

  • 作者单位

    Higher Technol Inst, Dept Civil Engn, 10th Of Ramadan City, Egypt;

    Taif Univ, Dept Civil Engn, At Taif 88821974, Saudi Arabia|Zagazig Univ, Dept Mat Engn, Zagazig 44519, Egypt;

    Suez Canal Univ, Fac Ind Educ, Dept Mech, Suez, Egypt;

    Zagazig Univ, Dept Mat Engn, Zagazig 44519, Egypt;

    Zagazig Univ, Dept Mat Engn, Zagazig 44519, Egypt|Jazan Univ, Dept Civil Engn, Jazan 706, Saudi Arabia;

  • 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

    RC beam; Strengthening; GFRP; NSM; End anchorage;

    机译：RC梁;加固;GFRP;NSM;末端锚固;

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