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Variable prestressing of CFRP sheets for strengthening reinforced concrete.

机译：CFRP板的可变预应力，用于增强钢筋混凝土。

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摘要

Fibre reinforced polymers (FRP) are gaining acceptance in the civil engineering community for the rehabilitation and strengthening of reinforced concrete structures. Recently, several studies have been conducted to determine the feasibility of prestressing carbon FRP (CFRP) sheets or plates. Several systems have been developed, but generally, permanent anchors are still required. The anchors are prone to corrosion; they reduce clearances, and are not aesthetically pleasing. In order to remove the anchors, the level of prestress at the ends of the CFRP sheets needs to be sufficiently low to prevent the premature debonding of the CFRP sheets. This can be achieved by varying the level of prestress along the length of the CFRP sheets from a constant force at the location of maximum moment to a force of zero at the ends. The change can be accomplished by gradually varying the level of prestress using increments.; The development and the application of the variable prestressing method using CFRP sheets were investigated during the experimental program. The best method to accelerate the curing of the epoxy by heating was determined and the strength of the epoxy bond after heat curing verified was verified by the initial tests. (Abstract shortened by UMI.)
机译：纤维增强聚合物（FRP）在土木工程界获得了修复和增强钢筋混凝土结构的认可。近来，已经进行了一些研究以确定预应力碳纤维增强塑料（CFRP）板或板的可行性。已经开发了几种系统，但是通常仍然需要永久锚。锚杆容易腐蚀；它们减少间隙，并且在美学上不令人满意。为了移除锚，CFRP片材的端部的预应力水平必须足够低以防止CFRP片材的过早剥离。这可以通过沿着CFRP板的长度改变预应力的大小来实现，即从最大力矩位置处的恒定力变为两端的零力。这种改变可以通过使用增量逐渐改变预应力的水平来实现。在实验程序中研究了使用CFRP板的可变预应力方法的发展和应用。确定了通过加热加速环氧树脂固化的最佳方法，并通过初始测试验证了热固化后环氧键的强度。 （摘要由UMI缩短。）

著录项

  • 作者

    Sauve, Francois.;

  • 作者单位

    Royal Military College of Canada (Canada).;

  • 授予单位 Royal Military College of Canada (Canada).;
  • 学科 Engineering Civil.
  • 学位 M.A.Sc.
  • 年度 2004
  • 页码 173 p.
  • 总页数 173
  • 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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