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Flexural response predictions of reinforced concrete beams strengthened with prestressed CFRP plates

机译：预应力CFRP板加固钢筋混凝土梁的弯曲响应预测

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摘要

Existing experimental studies showed that the reinforced concrete (RC) beams strengthened with prestressed carbon fiber-reinforced polymer (CFRP) plates had three possible flexural failure modes (including the compression failure, tension failure and debonding failure) according to the CFRP reinforcement ratio. Theoretical formulas based on the compatibility of strains and equilibrium of forces were presented to predict the nominal flexural strength of strengthened beams under the three failure modes, respectively, and a limitation on the tensile strain level developed in the prestressed CFRP plate was proposed as the debonding failure occurred. In addition, the calculation methods for cracking moment, crack width and deflection of strengthened beams were provided with taking into account the contribution of prestressed CFRP plates. Experimental studies on five RC beams strengthened with prestressed CFRP plates and a nonlinear finite element parametric analysis were carried out to verify the proposed theoretical formulas. The available test results conducted by other researchers were also compared with the predicted values.
机译：现有的实验研究表明，根据CFRP增强比，用预应力碳纤维增强聚合物（CFRP）板增强的钢筋混凝土（RC）梁具有三种可能的弯曲破坏模式（包括压缩破坏，拉伸破坏和剥离破坏）。提出了基于应变相容性和力平衡的理论公式，分别预测了三种破坏模式下加强梁的标称抗弯强度，并提出了对预应力CFRP板中产生的拉伸应变水平的限制发生故障。此外，考虑了预应力CFRP板的作用，提供了计算梁的开裂弯矩，裂缝宽度和挠度的方法。对五个预应力CFRP板加固的RC梁进行了试验研究，并进行了非线性有限元参数分析，以验证所提出的理论公式。其他研究人员进行的测试结果也与预测值进行了比较。

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  • 来源
    《Composite Structures》 |2010年第3期|612-622|共11页
  • 作者

    Weichen Xue; Yuan Tan; Lei Zeng;

  • 作者单位

    Department of Building Engineering, Tongji University, Shanghai 200092, PR China;

    Department of Building Engineering, Tongji University, Shanghai 200092, PR China;

    Department of Building Engineering, Tongji University, Shanghai 200092, PR China;

  • 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

    prestressed CFRP plate; flexural strengthening; RC beam; theoretical formula;

    机译：预应力CFRP板;抗弯加固;钢筋混凝土梁;理论公式;

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