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Strengthening RC beams with composite fiber cement plate reinforced by prestressed FRP rods: Experimental and numerical analysis

机译：预应力FRP筋加固复合纤维水泥板加固RC梁：试验与数值分析。

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摘要

This paper deals with the development of a new strengthening system for reinforced concrete beams with externally-bonded plate made of composite fiber cement reinforced by rebars made of fiber-reinforced plastic (FRP) [1]. The proposed strengthening material involves the preloading of FRP rod before mortar casting. The paper presents experimental and numerical analysis carried out on many large-scale beams strengthened by well-known reinforcement techniques, such as externally bonded Carbon Fiber-Reinforced Plastic (CFRP) plate and the Near Surface Mounted (NSM) technique, which are compared to the proposed new strengthening material through four-point bending tests. Results are analyzed with regard to the load-displacement curve, bending stiffness, cracking load, yield strength and failure load. The developed numerical model is in agreement with the experimental results. It clearly shows the effects of prestressed FRP rod on cracking mechanisms and internal strength distribution in the analyzed beams.
机译：本文研究了一种新的钢筋混凝土梁加固系统的开发，该钢筋混凝土梁由外粘结板制成，外粘结板由纤维增强塑料（FRP）制成的复合纤维水泥加固[1]。建议的加固材料包括在砂浆铸造之前对FRP杆进行预加载。本文介绍了对许多通过众所周知的加固技术加固的大型梁进行的实验和数值分析，例如，外粘结碳纤维增强塑料（CFRP）板和近表面安装（NSM）技术，它们与通过四点弯曲测试提出了新的增强材料。分析了载荷-位移曲线，弯曲刚度，裂纹载荷，屈服强度和破坏载荷的结果。建立的数值模型与实验结果吻合。它清楚地显示了预应力FRP杆对分析梁中的开裂机理和内部强度分布的影响。

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  • 来源
    《Composite Structures》 |2012年第3期|p.830-838|共9页
  • 作者

    Amir Si-Larbi; Amen Agbossou; Emmanuel Ferrier; Laurent Michel;

  • 作者单位

    LGCIE, University Lyon 1,INSA LYON, 82 bd Niels Bohr, 69622 Villeurbanne, Cedex, France;

    Universite de Savoie, LOCIE, CNRS UMR 5271, Campus Scientifique, Savoie Technolac, 73376 he Bourget du Lac Cedex, France;

    LGCIE, University Lyon 1,INSA LYON, 82 bd Niels Bohr, 69622 Villeurbanne, Cedex, France;

    LGCIE, University Lyon 1,INSA LYON, 82 bd Niels Bohr, 69622 Villeurbanne, Cedex, France;

  • 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

    strengthening plate; reinforced concrete beams; cracks; strengthening; FRP; prestressing;

    机译：加强板钢筋混凝土梁;裂缝强化;玻璃钢;预应力;

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