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Hybrid fiber influence on strength and toughness of RC beams

机译：混杂纤维对RC梁强度和韧性的影响

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摘要

In this paper, a newly developed method of evaluating the shear toughness of fiber reinforced RC beams in terms of its post-peak nominal average equivalent shear strength was investigated. This method is simple and the advantages are significant.rnBased on the investigation on the workability of hybrid fiber reinforced self-compacting concrete (HFRSCC), this paper analyzed the influence of various fiber types, including steel macro-fiber and hybrid fiber (macro-steel fiber+macro plastic fiber) on the shear strength and shear toughness of RC beams. The major test variables are the fiber contents, fiber types and stirrup ratios. The effects of stirrups and hybrid fibers on improving of beam toughness by the novel method are compared. The results indicate that hybrid fibers can evidently enhance both the shear toughness and the ultimate shear bearing capacity.
机译：本文研究了一种新的评估纤维增强RC梁抗剪强度的方法，该方法根据其峰后名义平均等效抗剪强度进行评估。该方法简便易行，具有明显的优势。在研究混合纤维增强自密实混凝土（HFRSCC）的可加工性的基础上，本文分析了各种纤维类型的影响，包括钢大纤维和混合纤维（宏钢纤维+宏塑料纤维）对RC梁的抗剪强度和抗剪韧性的影响。主要的测试变量是纤维含量，纤维类型和箍筋比。比较了新型方法对箍筋和杂化纤维对提高梁的韧性的影响。结果表明，杂化纤维可以明显提高剪切韧性和极限剪切承载力。

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  • 来源
    《Composite Structures》 |2010年第9期|2083-2089|共7页
  • 作者

    Yining Ding; Zhiguo You; Said Jalali;

  • 作者单位

    State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, 116024 Dalian, China;

    rnState Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, 116024 Dalian, China;

    Department of Civil Eng. University of Minho, 4200-465 Minho, Portugal;

  • 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

    hybrid fiber; SCC; shear toughness; failure mode; shear strength; RC beam;

    机译：混合纤维SCC;剪切韧性故障模式;剪切强度RC梁;

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