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首页> 外文学位 >Development of Vacuum Assisted Resin Transfer Molding (VARTM) method for the repair and strengthening of concrete structures.
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Development of Vacuum Assisted Resin Transfer Molding (VARTM) method for the repair and strengthening of concrete structures.

机译：真空辅助树脂传递模塑（VARTM）方法的开发，用于混凝土结构的修复和加固。

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摘要

Resin infusion, a method of fabricating fiber reinforced polymer (FRP), has been shown to produce a stronger FRP of more consistent quality than other methods. It is a preferred method of fabrication in industries like automotive, aerospace, and boat build-ing. In infrastructure, however, FRP is commonly applied by the hand layup method. Hand layup is known to produce FRP of questionable quality.;Vacuum Assisted Resin Transfer Molding (VARTM), a form of resin infusion, can be used to apply externally bonded FRP to infrastructure to increase structural ca-pacity. Based on experience and knowledge in other industries, VARTM is expected to produce a better FRP than that currently used in infrastructure. This body of work aims to facilitate the transfer of a proven technology for the benefit of this industry.;Lack of knowledge about VARTM in infrastructure is an impediment to the adop-tion of an application method which could produce a better final product. This research sets out to determine VARTM's benefits or drawbacks compared to hand layup for infra-structure applications. Shear and flexural ultimate strength and ultimate strain are tested and compared to verify the assumption that VARTM can produce a better FRP.;Gap analysis, including that of the American Concrete Institute (ACI) 440R, has identified FRP durability as one of the main areas where further research is needed for externally bonded FRP. This research does a thorough analysis of the performance of both VARTM and hand layup FRP durability. Temperature and humidity have been identified as the principal drivers of environmental degradation. Accelerated condition-ing protocols (ACP) for both temperature extremes are applied.;Having analyzed VARTM FRP strength and durability, this research will also test a modification to improve the VARTM application process on concrete structures. Grooves sawed into concrete are believed to be able to accelerate the VARTM applica-tion time without diminishing the capacity of the final product. Both of these assump-tions are tested and verified.;Having proven VARTM performance and having found a way to improve the original application process, it is hoped that this research has facilitated the implementa-tion of VARTM FRP.
机译：树脂灌注是一种制造纤维增强聚合物（FRP）的方法，已显示出比其他方法可产生质量更高，质量更稳定的FRP。它是汽车，航空航天和造船业等行业中的首选制造方法。但是，在基础架构中，FRP通常通过手工敷设法来应用。手工叠层可生产出质量可疑的玻璃钢。真空辅助树脂传递成型（VARTM）是一种树脂灌注形式，可用于将外部粘合的玻璃钢应用于基础设施以增加结构性能。根据其他行业的经验和知识，VARTM有望产生比当前基础设施更好的FRP。这项工作旨在促进为该行业的利益转让已验证的技术。；对基础架构中VARTM的了解不足，阻碍了采用可能会产生更好最终产品的应用方法。这项研究着手确定VARTM与用于基础结构应用的手糊相比的优缺点。测试并比较了抗剪和弯曲极限强度和极限应变，以验证VARTM可以产生更好的FRP的假设。间隙分析（包括美国混凝土协会（ACI）440R的分析）已将FRP耐久性确定为主要领域之一需要对外部粘结的FRP进行进一步研究的地方。这项研究对VARTM和手糊FRP耐久性的性能进行了透彻的分析。温度和湿度已被确定为环境退化的主要驱动力。两种温度都适用加速条件处理协议（ACP）。分析了VARTM FRP的强度和耐久性后，本研究还将测试一种改进方法，以改善VARTM在混凝土结构上的应用过程。据信，切成混凝土的沟槽可以加快VARTM应用时间，而不会降低最终产品的生产能力。这两个假设都经过了测试和验证。具有成熟的VARTM性能并找到了改进原始应用程序的方法，希望这项研究有助于VARTM FRP的实现。

著录项

  • 作者

    Ramos, Luis P.;

  • 作者单位

    The University of Alabama at Birmingham.;

  • 授予单位 The University of Alabama at Birmingham.;
  • 学科 Engineering Civil.
  • 学位 Ph.D.
  • 年度 2013
  • 页码 123 p.
  • 总页数 123
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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