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Behaviour of fibre reinforced polymer confined reinforced concrete columns under fire condition.

机译：纤维增强聚合物约束钢筋混凝土柱在火灾情况下的行为。

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摘要

In recent years, fibre reinforced polymer (FRP) materials have demonstrated enormous potential as materials for repairing and retrofitting concrete bridges that have deteriorated from factors such as electro-chemical corrosion and increased load requirements. However, concerns associated with fire remain an obstacle to applications of FRP materials in buildings and parking garages due to FRP's sensitivity to high temperatures as compared with other structural materials and to limited knowledge on their thermal and mechanical behaviour in fire. This thesis presents results from an ongoing study on the fire performance of FRP materials, fire insulation materials and systems, and FRP wrapped reinforced concrete columns. The overall goal of the study is to understand the fire behaviour of FRP materials and FRP strengthened concrete columns and ultimately, provide rational fire safety design recommendations and guidelines for FRP strengthened concrete columns.A combined experimental and numerical investigation was conducted to achieve the goals of this research study. The experimental work consisted of both small-scale FRP material testing at elevated temperatures and full-scale fire tests on FRP strengthened columns. A numerical model was developed to simulate the behaviour of unwrapped reinforced concrete and FRP strengthened reinforced concrete square or rectangular columns in fire. After validating the numerical model against test data available in literature, it was determined that the numerical model can be used to analyze the behaviour of concrete axial compressive members in fire. Results from this study also demonstrated that although FRP materials experience considerable loss of their mechanical and bond properties at temperatures somewhat below the glass transition temperature of the resin matrix, externally-bonded FRP can be used in strengthening concrete structural members in buildings, if appropriate supplemental fire protection system is provided over the FRP strengthening system.
机译：近年来，纤维增强聚合物（FRP）材料作为修补和翻新混凝土桥梁的材料已显示出巨大的潜力，而混凝土桥梁由于诸如电化学腐蚀和增加的载荷要求等因素而恶化。然而，由于与其他结构材料相比，FRP对高温的敏感性以及对它们在火中的热和机械性能的了解有限，与火灾相关的问题仍然是FRP材料在建筑物和停车场中应用的障碍。本文介绍了有关FRP材料，隔热材料和系统以及FRP包裹的钢筋混凝土柱的耐火性能的持续研究成果。本研究的总体目标是了解FRP材料和FRP增强混凝土柱的防火性能，并最终为FRP增强混凝土柱提供合理的防火设计建议和指导原则。这项研究。实验工作包括在高温下进行小型FRP材料测试和在FRP加强柱上进行全面的耐火测试。建立了一个数值模型来模拟未包裹的钢筋混凝土和FRP钢筋混凝土的方形或矩形柱在火灾中的行为。根据文献中提供的测试数据验证了数值模型后，确定该数值模型可用于分析混凝土轴向受压构件在火灾中的行为。这项研究的结果还表明，尽管FRP材料在略低于树脂基质玻璃化转变温度的温度下会遭受很大的机械性能和粘结性能损失，但外粘结FRP可以用于加固建筑物的混凝土结构构件，如果合适的话在FRP加强系统上提供了防火系统。

著录项

  • 作者

    Chowdhury, Ershad Ullah.;

  • 作者单位

    Queen's University (Canada).;

  • 授予单位 Queen's University (Canada).;
  • 学科 Engineering Civil.Engineering Materials Science.
  • 学位 Ph.D.
  • 年度 2010
  • 页码 260 p.
  • 总页数 260
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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