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Author:

Deng, Zongcai (Deng, Zongcai.) (Scholars:邓宗才) | Wan, Cao (Wan, Cao.)

Indexed by:

EI Scopus PKU CSCD

Abstract:

A total of 96 test specimens with embedded reinforcing bars were strengthened by two layer of transverse CFRP (carbon fiber sheets) after accelerated corrosion. Pullout tests on the specimens were conducted to study the effect of CFRP confinement on the bond behavior between corroded reinforcement and steel fibrous concrete, considering the contributions of different elements, including reinforcing bar types, cover depths, corrosion rates, CFRP confinements, and steel fiber. The failure mechanisms were studied. The test results show that CFRP confinements can make the failure mode of deformed reinforcing bar specimens change from steel fibrous concrete splitting to bar pull-out. The main influencing factors of the ultimate bond strength are reinforcement bar types and cover depths, the ultimate bond strength of deformed reinforcement bar specimens is twice as large as that of plain reinforcement bar specimens, and the ultimate bond strength increases when the cover depth changes from 40mm to 60mm. CFRP is effective on slowing down the bond stress reduction rate and maintaining the bond strength. When the corrosion rate is less than 5%, the ultimate bond strength of corroded steel fibrous concrete specimens increases gradually along with the rise of corrosion rate, and decreases when the corrosion rate is higher than 5%. The steel fiber can increase the bond strength of reinforcement and steel fibrous concrete effectively, and make the descending branch of bond-slip curves much smoother.

Keyword:

Corrosion Steel corrosion Steel testing Bars (metal) Concretes Bond strength (materials) Steel fibers Reinforcement Carbon fibers Corrosion rate Failure (mechanical) Carbon fiber reinforced plastics Concrete testing

Author Community:

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

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Source :

China Civil Engineering Journal

ISSN: 1000-131X

Year: 2012

Issue: 8

Volume: 45

Page: 41-47

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 10

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