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Flexural behavior of reinforced concrete beams externally bonded with CFRP sheets.

机译：CFRP薄板外部粘结的钢筋混凝土梁的抗弯性能。

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摘要

Externally bonding fiber reinforced polymer (FRP) sheets with epoxy matrix is an effective technique for strengthening and repairing reinforced concrete (RC) beams under flexural wads. However, effective methods to evaluate the serviceability of FRP RC beams are not fully understood nor developed yet. A comprehensive analytical method for modeling the strain distribution and stress transfer between materials and crack width in FRP RC beams was carried out in this study. A total of eight beams was tested and analyzed: two were control beams and six were reinforced with carbon fiber reinforced polymer (CFRP) sheets glued by epoxy resin. Double steel reinforcement, different reinforcement ratios and various types of epoxy matrix were used to simulate the variety of conditions. All specimens were subjected to a four-point-bending load while the crack widths and mid-span strains at both compression and tension faces were recorded. Both experimental and theoretical results are presented and compared. The results showed there is a good agreement between the experimental and analytical results. Step-by-step procedures for applying this method and examples using MATLAB based computing programs were also presented.
机译：与环氧树脂基体进行外部粘结的纤维增强聚合物（FRP）板是一种有效的技术，可用于加固和修复弯曲弯矩下的钢筋混凝土（RC）梁。但是，评估FRP RC梁可使用性的有效方法尚未完全了解或开发。本研究采用了一种综合的分析方法来模拟FRP RC梁中材料之间的应变分布和应力传递以及裂纹宽度。总共测试和分析了八根梁：两根是控制梁，六根是用环氧树脂粘合的碳纤维增强聚合物（CFRP）片加固的。使用双钢加固，不同的加固比例和各种类型的环氧基质来模拟各种条件。所有试样均承受四点弯曲载荷，同时记录压缩面和拉伸面的裂纹宽度和中跨应变。给出并比较了实验结果和理论结果。结果表明，实验和分析结果之间有很好的一致性。还介绍了应用此方法的分步过程以及使用基于MATLAB的计算程序的示例。

著录项

  • 作者

    Zhang, Yue.;

  • 作者单位

    The University of Alabama in Huntsville.;

  • 授予单位 The University of Alabama in Huntsville.;
  • 学科 Engineering Civil.
  • 学位 M.S.E.
  • 年度 2003
  • 页码 68 p.
  • 总页数 68
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

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