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首页> 外文学位 >Accelerated testing for bond reliability of fiber-reinforced polymers (FRP) to concrete and steel in aggressive environments.
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Accelerated testing for bond reliability of fiber-reinforced polymers (FRP) to concrete and steel in aggressive environments.

机译：在侵蚀性环境下，加快了纤维增强聚合物（FRP）与混凝土和钢之间粘结可靠性的测试。

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摘要

The contents of this dissertation present five submitted journal papers corresponding to experiments and prediction analysis of the bonding characteristics of fiber-reinforced-polymers (FRP) to concrete and steel. The papers are submitted to the American Society of Civil Engineers (ASCE) Journal of Structural Engineering and the American Concrete Institute (ACI) Journal of Composites for Construction.; The first paper provides the background on the importance of resin systems in composites, particularly, for retrofitting and rehabilitating of existing structures. The paper provides a general understanding of the structure and important characteristics of epoxies for civil engineers involved in research and the application of FRP in construction. This paper also presents an overview of studies conducted on the durability of epoxy bonded joints in moist environments.; The second and third paper provide the results of a comprehensive study on evaluation of bond strength of fiber-reinforced-plastics (FRP) to concrete and steel in simulated aggressive environments. The severity of bond deterioration varies in different environments and is quantified in this study. Fracture toughness is evaluated at the initiation of cracking and during the propagation of cracking. The environments consist of high temperature (120°F), acidic (pH = 3), alkaline (pH = 12), seawater (pH = 8.3), and high humidity 100%. The experiments consist of testing in shear 728 unidirectional carbon FRP coupons bonded to concrete and steel blocks. The lap shear tests evaluate the bond strength and fracture toughness of the FRP/substrate interface as related to different exposure times in different environments.; The last two papers focus on accelerated degradation testing techniques, and discuss the lifetime prediction on the bond of carbon (FRP) to concrete and steel. Fick's law of diffusion is used to model the moisture penetrating through the FRP and into the bonded joint. A reliability analysis is developed to predict the fracture toughness at any relative humidity and temperature, based on the 100% relative humidity conditions at ambient temperature. The results in this study generally show an excellent durability for the FRP bonded to either concrete or steel, even in the most severe environments.
机译：本论文的内容是针对纤维增强聚合物（FRP）与混凝土和钢之间的粘结特性的实验和预测分析，提出了五篇提交的期刊论文。这些论文被提交给美国土木工程师学会（ASCE）结构工程杂志和美国混凝土研究所（ACI）建筑复合材料杂志。第一篇论文提供了树脂体系在复合材料中的重要性的背景，特别是对于现有结构的翻新和修复。本文为参与研究的土木工程师以及FRP在建筑中的应用提供了对环氧树脂结构和重要特性的一般理解。本文还概述了在潮湿环境中对环氧粘合接头的耐久性进行的研究。第二篇和第三篇文章提供了在模拟侵蚀性环境下评估纤维增强塑料（FRP）与混凝土和钢的粘结强度的综合研究结果。键变质的严重程度在不同的环境中有所不同，并在本研究中进行了量化。在裂纹开始时和裂纹扩展过程中评估断裂韧性。环境包括高温（120°F），酸性（pH = 3），碱性（pH = 12），海水（pH = 8.3）和高湿度<100％。实验包括在728个剪切的单向碳FRP试块中粘结到混凝土和钢块上的测试。搭接剪切测试评估FRP /基材界面的粘合强度和断裂韧性，这与在不同环境中的不同暴露时间有关。最后两篇论文集中于加速降解测试技术，并讨论了碳（FRP）与混凝土和钢之间的粘结寿命预测。菲克扩散定律用于模拟通过FRP渗入粘结接头的水分。基于环境温度下100％的相对湿度条件，进行可靠性分析以预测在任何相对湿度和温度下的断裂韧性。这项研究的结果通常表明，即使在最恶劣的环境下，FRP粘结到混凝土或钢上的耐久性也极好。

著录项

  • 作者

    Woods, Jonathan Michael.;

  • 作者单位

    The University of Arizona.;

  • 授予单位 The University of Arizona.;
  • 学科 Engineering Civil.
  • 学位 Ph.D.
  • 年度 2003
  • 页码 213 p.
  • 总页数 213
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

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