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Polymers 2016, 8(6), 211;

Monotonic and Cyclic Bond Behavior of Deformed CFRP Bars in High Strength Concrete

Institute of Science and Technologie, Istanbul Technical University, 34469 Istanbul, Turkey
Department of Architecture, Istanbul Technical University, 34437 Istanbul, Turkey
Department of Civil Engineering, Bogazici University, 34342 Istanbul, Turkey
Department of Civil Engineering, Istanbul Technical University, 34469 Istanbul, Turkey
Author to whom correspondence should be addressed.
Academic Editor: Jorge de Brito
Received: 31 March 2016 / Revised: 8 May 2016 / Accepted: 19 May 2016 / Published: 31 May 2016
(This article belongs to the Special Issue Selected Papers from “SMAR 2015”)
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Composite reinforcing bars (rebars) that are used in concrete members with high performance (strength and durability) properties could have beneficial effects on the behavior of these members. This is especially vital when a building is constructed in an aggressive environment, for instance a corrosive environment. Although tension capacity/weight (or volume) ratios in composite rebars (carbon fiber reinforced polymer (CFRP), glass fiber reinforced polymer (GFRP), etc.) are very high when compared to steel rebars, major weaknesses in concrete members reinforced with these composite rebars may be the potential consequences of relatively poor bonding capacity. This may even be more crucial when the member is subjected to cyclic loading. Although monotonic bond tests are available in the literature, only limited experimental studies exist on bond characteristics under cyclic loading conditions. In order to fill this gap and propose preliminary design recommendations, 10 specimens of 10-mm-diameter ribbed CFRP rebars embedded in specially designed high strength concrete (fc = 70 MPa) blocks were subjected to monotonic and cyclic pullout tests. The experimental results showed that cyclically loaded CFRP rebars had less bond strength than those companion specimens loaded monotonically. View Full-Text
Keywords: bond strength; CFRP; cyclic; pullout; high strength concrete bond strength; CFRP; cyclic; pullout; high strength concrete

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Akbas, T.T.; Celik, O.C.; Yalcin, C.; Ilki, A. Monotonic and Cyclic Bond Behavior of Deformed CFRP Bars in High Strength Concrete. Polymers 2016, 8, 211.

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