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Flexural strengthening of RC beams using textile reinforced mortar - Experimental and numerical study

机译:纺织增强砂浆加固RC梁的试验与数值研究。

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摘要

In this paper, the effectiveness of textile reinforced mortars (TRMs), as a means of increasing the flexural capacity of reinforced concrete (RC) beams, is experimentally and numerically investigated. A new type of textile (basalt-based textile) was used as strengthening material. The studied parameters included type of mortar, number of TRM layers and type of strengthening material: TRM versus carbon fiber-reinforced polymer (CFRP) composites. A total of six beams were tested under four-point bending till failure. Two beams were used as control specimens. Three beams were externally upgraded by TRM sheets for enhancing their flexural capacity; and one beam was strengthened with CFRP laminates for comparison with its TRM counterpart. Besides the experimental program, a numerical investigation utilizing nonlinear finite element (FE) analysis was carried out using LS-DYNA software. In addition to the six beams tested in this study, another three beams were collected from the literature for the purpose of finite element validation. A comparison was made between the experimental and numerical results and good agreement was obtained. Based on the validation of FE results, the numerical analysis was extended to include additional cases to study the flexural enhancement of RC beams using more TRM layers with different end anchorages.
机译:在本文中,对纺织增强砂浆(TRM)的有效性进行了实验和数值研究,以提高增强钢筋混凝土(RC)梁的抗弯能力。一种新型纺织品(玄武岩基纺织品)被用作增强材料。研究的参数包括砂浆的类型,TRM层的数量和增强材料的类型:TRM与碳纤维增强聚合物(CFRP)复合材料。在四点弯曲直至失效之前,总共测试了六个梁。使用两个光束作为对照样品。 TRM板从外部升级了三根梁,以增强其抗弯能力;并用CFRP层压板加固了一个梁,以与TRM对应梁进行比较。除实验程序外,还使用LS-DYNA软件进行了利用非线性有限元(FE)分析的数值研究。除了在本研究中测试的六根光束之外,还从文献中收集了另外三束用于有限元验证的光束。对实验结果与数值结果进行了比较,取得了很好的一致性。基于有限元结果的验证,将数值分析扩展到包括其他案例,以研究使用更多具有不同端锚的TRM层的RC梁的挠曲增强。

著录项

  • 来源
    《Composite Structures》 |2013年第3期|40-55|共16页
  • 作者单位

    Specialty Units for Safety & Preservation of Structures, Department of Civil Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia,On leave from the Department of Civil Engineering, Helwan University, Cairo,Egypt;

    Specialty Units for Safety & Preservation of Structures, Department of Civil Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia;

    Specialty Units for Safety & Preservation of Structures, Department of Civil Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia;

    Specialty Units for Safety & Preservation of Structures, Department of Civil Engineering, King Saud University, P.O. Box 800, Riyadh 11421, 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

    textile reinforced mortar; concrete beams; flexural strengthening; finite element modeling;

    机译:纺织增强砂浆;混凝土梁;抗弯加固;有限元建模;

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