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首页> 外文期刊>Arabian Journal for Science and Engineering >Experimental and Theoretical Research on Low‑Strength Concrete Beams Reinforced with Basalt Fibre‑Reinforced Plastic Sheets in a Freeze–Thaw Environment
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Experimental and Theoretical Research on Low‑Strength Concrete Beams Reinforced with Basalt Fibre‑Reinforced Plastic Sheets in a Freeze–Thaw Environment

机译：用玄武岩纤维增强塑料板加固低强度混凝土梁的实验与理论研究

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摘要

Basalt fibre-reinforced plastic sheet (BFRP) enhancement is one of the strengthening methods suitable for concrete structuresdue to the low price and high tensile strength of BFRPs. It is of great importance to study the mechanical performance ofBFRP-reinforced low-strength concrete structures in freeze–thaw environments. Therefore, 15 concrete beam specimenswere designed, and a fast freeze–thaw experiment was conducted in this research to consider different parameters, suchas the number of freeze–thaw cycles, sequence of freezing–thawing and BFRP pasting and other factors. The mechanicalperformance of low-strength concrete beams reinforced with BFRPs under freeze–thaw cycles was investigated. The failuremode and load–deflection curves of specimens were also analysed. The test results revealed that the ultimate strength ofconcrete beams reinforced with BFRPs was greatly improved, with a maximum increase of 32.7%. With increasing numberof freeze–thaw cycles, the ultimate strength of beams gradually decreased over the bearing capacity of non-frozen-thawedconcrete beams reinforced with BFRPs (F0b), and the bearing capacity of low-strength concrete beams reinforced withBFRPs decreased 17.1% after 50 continuous freeze–thaw cycles, while the beam failure mode changed from bending failureto shear failure accompanied by de-bonding failure. A mechanical model of BFRP-reinforced low-strength concrete beamswas constructed under the de-bonding failure mode, and a calculation equation to determine the magnitude of de-bondingfailure was proposed. Finally, finite element analysis of specimens was performed with cohesive elements to simulate thenonlinear softening mechanical behaviour of the BFRP–concrete interface.
机译：玄武岩纤维增强塑料板（BFRP）增强是适用于混凝土结构的强化方法之一由于BFRPS的低价格和高抗拉强度。研究机械性能非常重要BFRP加强低强度混凝土结构在冻融环境中。因此，15个混凝土梁标本设计了，在这项研究中进行了快速冻融实验，以考虑不同的参数，如作为冻融循环的数量，冻融序列和BFRP粘贴等因素。机械研究了低强度混凝土梁在冻融循环下加强了BFRPS的低强度混凝土梁。失败还分析了标本的模式和负载偏转曲线。测试结果表明，最终的力量用BFRP加固的混凝土梁大大提高，最大增加32.7％。随着人数的越来越多冻融循环循环，梁的极限强度在非冷冻解冻的承载力上逐渐降低用BFRPS（F0B）加固的混凝土梁，以及加强的低强度混凝土梁的承载力50次连续冻融循环后，BFRP减少了17.1％，而梁故障模式从弯曲失败发生变化剪切失效伴随着去粘合失败。 BFRP增强低强度混凝土梁的机械模型在去粘合失败模式下构造，以及计算方程以确定去粘合的大小未能提出失败。最后，用粘性元素进行样品的有限元分析以模拟BFRP混凝土界面的非线性软化力学行为。

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  • 来源
    《Arabian Journal for Science and Engineering》 |2021年第5期|5121-5134|共14页
  • 作者

    Zaiping Zeng; Xiuli Wang; Shirong Li; Genli Ren;

  • 作者单位

    School of Civil Engineering Lanzhou Universityof Technology Lanzhou 730050 Gansu Province China Western Civil Engineering Disaster Preventionand Reduction of Engineering Research Center Ministryof Education Lanzhou 730050 Gansu Province China Gansu Vocational College of Architecture Lanzhou 730050 Gansu Province China;

    School of Civil Engineering Lanzhou Universityof Technology Lanzhou 730050 Gansu Province China Western Civil Engineering Disaster Preventionand Reduction of Engineering Research Center Ministryof Education Lanzhou 730050 Gansu Province China;

    School of Civil Engineering Lanzhou Universityof Technology Lanzhou 730050 Gansu Province China;

    School of Civil Engineering Lanzhou Universityof Technology Lanzhou 730050 Gansu Province China;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Basalt fibre-reinforced plastic sheet (BFRP); Freeze–thaw cycle; Low-strength concrete beam; Reinforcement; Failure mode;

    机译：玄武岩纤维增强塑料板（BFRP）;冻融循环;低强度混凝土梁;加强;故障模式;

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