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FRP composites for shear strengthening of reinforced concrete deep beams with openings

机译：FRP复合材料用于带孔钢筋混凝土深梁的剪力加固

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摘要

This paper presents the results of a research work aimed at examining the potential use of externally bonded carbon fiber reinforced polymer (CFRP) composite sheets as a strengthening solution to upgrade reinforced concrete (RC) deep beams with openings. A total of 13 deep beams with openings were constructed and tested under four-point bending. Test specimen had a cross section of 80 × 500 mm and a total length of 1200 mm. Two square openings, one in each shear span, were placed symmetrically about the mid-point of the beam. Test parameters included the opening size, location, and the presence of the CFRP sheets. The structural response of RC deep beams with openings was primarily dependent on the degree of the interruption of the natural load path. Externally bonded CFRP shear strengthening around the openings was found very effective in upgrading the shear strength of RC deep beams. The strength gain caused by the CFRP sheets was in the range of 35-73%. A method of analysis for shear strength prediction of RC deep beams containing openings strengthened with CFRP sheets was studied and examined against test results.
机译：本文介绍了一项研究工作的结果，该研究旨在检查使用外部粘结的碳纤维增强聚合物（CFRP）复合板作为加强解决方案的潜在解决方案，以升级带有开口的钢筋混凝土（RC）深梁。总共构造了13个带有开口的深梁，并在四点弯曲下进行了测试。试样的横截面为80×500mm，总长度为1200mm。两个方形开口（每个剪切跨度各一个）围绕梁的中点对称放置。测试参数包括开口尺寸，位置和CFRP板的存在。带开口的RC深梁的结构响应主要取决于自然载荷路径的中断程度。发现在开口周围进行外部粘结的CFRP剪力加固对于提高RC深梁的抗剪强度非常有效。 CFRP片材导致的强度增加在35-73％的范围内。研究了一种用CFRP片加固的含开口的RC深梁的抗剪强度预测分析方法，并针对测试结果进行了检验。

著录项

  • 来源
    《Composite Structures》 |2009年第1期|60-69|共10页
  • 作者

    Tamer El Maaddawy; Sayed Sherif;

  • 作者单位

    UAE-University, Al-Ain, Abu Dhabi, P.O. Box 17555, United Arab Emirates;

    Structural Engineering Department, Al-Wasl Al-Gadeed Consultants, Dubai, United Arab Emirates;

  • 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

    concrete; deep beams; openings; FRP; strengthening;

    机译：具体;深光束开口;玻璃钢;强化;

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