Mechanics of debonding in FRP-plated RC beams
Mechanics of debonding in FRP-plated RC beams
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DOI：
10.1680/stbu.2009.162.5.335
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发表时间：
2009-10
期刊：
影响因子：
--
通讯作者：
J. Teng;Jian fei Chen
中科院分区：
文献类型：
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作者：
J. Teng;Jian fei Chen
钢筋混凝土（RC）梁的抗弯和抗剪强度都可以通过使用外部粘合纤维增强聚合物（FRP）以板/条/板（简称板）的形式来大幅提高。这种FRP涂覆RC梁的破坏通常是由于FRP板在许多不同的模式下从RC梁上剥离而发生的。本文主要基于作者及其同事的研究，总结了目前对frp涂层RC梁脱粘破坏机制的理解。在简要概述了常用加固方法后，对可能的脱粘破坏模式进行了系统分类。然后讨论FRP和混凝土之间的界面应力和粘结行为，然后检查脱粘失效的机制和过程。在此基础上，提出了关键脱粘破坏模式的先进强度模型。论文最后对未来的研究需求进行了简要的讨论。
Both the flexural and shear strengths of reinforced concrete (RC) beams can be substantially increased using externally bonded fibre-reinforced polymer (FRP) reinforcement in the forms of sheets/strips/plates (all referred to as plates for brevity). Failures of such FRP-plated RC beams often occur by debonding of the FRP plate from the RC beam in a number of distinct modes. This paper provides a summary of the current understanding of the mechanics of debonding failures in FRP-plated RC beams largely based on the research of the authors and their co-workers. A systematic classification of possible debonding failure modes is presented following a brief outline of the common strengthening methods. The interfacial stresses and bond behaviour between FRP and concrete are then discussed before the mechanisms and processes of debonding failures are examined. Furthermore, advanced strength models for the key debonding failure modes are presented. The paper concludes with a brief discussion of future research needs.