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Bending and bond behavior and design of concrete beams reinforced with fiber-reinforced plastic rebars.

机译:纤维增强塑料钢筋增强的混凝土梁的弯曲和粘结性能及设计。

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摘要

The use of non-corrosive fiber reinforced plastic (FRP) rebars in lieu of mild steel rods is investigated. The present work covers experimental testing of twenty-seven concrete beams reinforced with FRP rebars subjected to bending, twenty-four cantilever specimens subjected to bond forces, and twelve straight pull-out specimens. The following response of concrete beams reinforced with FRP rebars were investigated: pre- and post-cracking behavior, load-deflection and stress variations, elastic and ultimate load carrying capacities, crack widths and patterns, bond stress and embedment length, and modes of failure. In order to take advantage of the high tensile strength of FRP rebars (80 to 130 ksi), high (6-10 ksi) concrete in lieu of regular strength concrete (4 ksi) is used. The use of sand coated FRP rebars in addition to higher strength concretes improved the overall behavior of the beams. It is shown that a 90% increase in ultimate moment capacity is achieved over beams reinforced with steel rebars for the same area and strength of concrete. Theoretical correlations with experimental results are conducted in terms of elastic and ultimate bending moment, crack width, post cracking deflection, and bond and development length. Simple design equations for structural design applications are developed with similarities and parallels to current ACI 318-89 code equations. Step by step design example is presented based on the above design equations.
机译:研究了使用非腐蚀性纤维增强塑料(FRP)钢筋代替低碳钢棒。目前的工作涵盖了对FRP钢筋进行弯曲的27条混凝土梁,24条受到粘结力的悬臂试样以及12条直拉试样的实验测试。研究了用FRP钢筋加固的混凝土梁的以下响应:开裂前后的行为,载荷挠度和应力变化,弹性和极限载荷能力,裂缝宽度和型式,粘结应力和嵌入长度以及破坏模式。为了利用FRP钢筋的高抗拉强度(80至130 ksi),使用高(6-10 ksi)的混凝土代替常规强度的混凝土(4 ksi)。除使用更高强度的混凝土外,还使用了砂涂玻璃钢增强了梁的整体性能。结果表明,在相同面积和强度的混凝土中,用钢筋加固的梁的极限弯矩承载力提高了90%。与实验结果的理论相关性是根据弹性和极限弯曲力矩,裂缝宽度,裂缝后挠度以及粘结和展开长度进行的。针对结构设计应用的简单设计方程式与当前ACI 318-89代码方程式具有相似性和相似性。基于上述设计方程,给出了分步设计示例。

著录项

  • 作者

    Faza, Salem Samir.;

  • 作者单位

    West Virginia University.;

  • 授予单位 West Virginia University.;
  • 学科 Engineering Civil.
  • 学位 Ph.D.
  • 年度 1991
  • 页码 213 p.
  • 总页数 213
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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