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首页> 外文期刊>Magazine of Concrete Research >Flexural behaviour of RC beams strengthened with high-tension steel rod
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Flexural behaviour of RC beams strengthened with high-tension steel rod

机译：高压钢筋加固RC梁的抗弯性能

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摘要

The objective of this research is to provide flexural test results that are applicable to the actual strengthening design of reinforced concrete (RC) beams by investigating the flexural capacities of RC beams strengthened with unbonded high-strength bars. The advantages of the proposed strengthening method are the speed and simplicity of installation. Additionally, it is possible to acquire strengthened performance without skilled workers. A set of ten laboratory tests on RC beams strengthened with high-strength bars and unstrengthened RC beams as the control group were performed. The main test parameters are the diameter of high-strength bar and the ratio of tension reinforcement. The equivalent tension reinforcement ratio of the high-tension bars to the strength ratio of rebars is also considered. The test result indicates that the maximum strain of the high-strength bars pre-tensioned with 40% yield strain exceeds the nominal yield strain of high-strength bars. The deflection ratio of the strengthened RC beam within the serviceability limit state was less than 54% in comparison with that of unreinforced beams. Thus, it is possible to simplify the design equation by using the equivalent tension reinforcement ratio.
机译：本研究的目的是通过研究用无粘结高强度钢筋加固的RC梁的抗弯承载力，从而提供可用于钢筋混凝土（RC）梁的实际加固设计的抗弯试验结果。所提出的加强方法的优点是安装的速度和简便性。另外，有可能在没有熟练工人的情况下获得增强的性能。以高强度钢筋和未加强的RC梁为对照组，对RC梁进行了十项实验室测试。主要测试参数为高强度钢筋的直径和抗拉强度的比率。还考虑了高强度钢筋的等效拉伸增强比与钢筋的强度比。测试结果表明，以40％屈服应变预拉伸的高强度钢筋的最大应变超过了高强度钢筋的标称屈服应变。与未增强梁相比，在使用寿命极限状态下增强RC梁的挠度比小于54％。因此，可以通过使用等效拉伸增强比来简化设计方程。

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  • 来源
    《Magazine of Concrete Research》 |2010年第2期|137-147|共11页
  • 作者

    K.-J. Shin; S.-H. Lee;

  • 作者单位

    Kyungpook National University, School of Architecture and Civil Engineering, 1370 Sankyuk-Dong, Buk-gu, Daegu 702-701, Korea;

    Kyungpook National University, School of Architecture and Civil Engineering, 1370 Sankyuk-Dong, Buk-gu, Daegu 702-701, Korea;

  • 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
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