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Flexural behaviour of FRP reinforced concrete beams strengthened with NSM CFRP strips

机译:NSM CFRP筋增强FRP钢筋混凝土梁的抗弯性能

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摘要

This paper presents the results on an experimental programme studying the flexural behaviour of internally reinforced Glass-Fibre Reinforced Polymer (GFRP) Reinforced Concrete (RC) beams strengthened with Carbon-FRP strips using the Near-Surface Mounted (NSM) technique. Their theoretical load-carrying capacity is assessed by a cracked sectional analysis. It is seen that NSM CFRP results an effective technique to enhance the flexural capacity of RC beams internally reinforced with GFRP bars, despite the high degrees of deformability of GFRP RC. Additionally, an a analytical study to evaluate the influence of different parameters on the flexural capacity of NSM CFRP strengthened concrete beams internally reinforced with either steel or GFRP bars is performed. In general, increasing the reinforcement ratio and mechanical properties, either internal or NSM, increases the flexural capacity. However, the change in the parameters may affect in a different way the ratios of increase and cause different modes of failure.
机译:本文介绍了一个实验程序的结果,该程序研究了采用近表面安装(NSM)技术的碳纤维增强塑料增强的内部增强玻璃纤维增​​强聚合物(GFRP)增强混凝土(RC)梁的抗弯性能。他们的理论承载能力是通过破裂的截面分析来评估的。可以看出,尽管GFRP RC具有高度的可变形性,但NSM CFRP仍是一种有效的技术,可提高用GFRP筋加固的RC梁的抗弯能力。此外,还进行了一项分析研究,以评估不同参数对用钢或GFRP筋内部加固的NSM CFRP增强混凝土梁的抗弯能力的影响。通常,增加增强比和内部或NSM的机械性能会增加抗弯能力。但是,参数的更改可能以不同的方式影响增加的比率,并导致不同的故障模式。

著录项

  • 来源
    《Composite Structures》 |2020年第6期|112059.1-112059.9|共9页
  • 作者

  • 作者单位

    Univ Girona Polytech Sch AMADE Girona 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

    Flexural behaviour; FRP internal reinforcement; NSM; CFRP;

    机译:弯曲行为;玻璃钢内部加固;NSM;碳纤维布;

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