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作者:

Deng, Zongcai (Deng, Zongcai.) (学者:邓宗才) | Wan, Cao (Wan, Cao.) | Li, Jianhui (Li, Jianhui.)

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摘要:

Right evaluation of the bond behavior between corroded reinforcement and concrete wrapped with FRP is a chief problem to confirm the effect of FRP confinement. 96 test specimens with embedded reinforcing bars were strengthened by two layers of transverse CFRP after accelerated corrosion. The pullout tests on the test specimens were conducted to study the bond behavior between corroded reinforcing bars and concrete, considering the contribution of different elements including reinforcing bar types, cover depths, corrosion rates, and CFRP confinements. The failure mechanisms were studied. The test results showed that CFRP confinements can make the failure mode of deformed reinforcing bar specimens changed from concrete splitting to bar pull-out. The main influencing factors of the ultimate bond strength were reinforcing bar types and cover depths, and the ultimate bond strength of deformed reinforcing bar specimens was one time larger than that of plain reinforcing bar specimens. When the corrosion rate was less than 5%, CFRP confinement had less contribution on increasing the ultimate bond strength, but it was effective on slowing down the bond stress's descending speed and maintaining the bond strength. When the corrosion rate was higher than 5%, the ultimate bond strength of corroded specimens drops gradually along with the rise of corrosion rate.

关键词:

Strengthening (metal) Concrete testing Bond strength (materials) Concrete reinforcements Bars (metal) Carbon fibers Reinforced concrete Corrosion Corrosion rate Failure (mechanical) Concretes Carbon fiber reinforced plastics

作者机构:

  • [ 1 ] [Deng, Zongcai]The Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing 100124, China
  • [ 2 ] [Wan, Cao]The Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing 100124, China
  • [ 3 ] [Li, Jianhui]The Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing 100124, China

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来源 :

Journal of Basic Science and Engineering

ISSN: 1005-0930

年份: 2012

期: 1

卷: 20

页码: 83-92

被引次数:

WoS核心集被引频次: 0

SCOPUS被引频次: 7

ESI高被引论文在榜: 0 展开所有

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