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Date of Publication:2006-01-01

Journal:大连理工大学学报

Issue:6

Page Number:862-867

ISSN No.:1000-8608

Abstract:External bonding fiber reinforced polymer (FRP) has been increasingly used to repair the concrete structures. Tests are necessary for verifying the durability of the strengthened structures due to the short time application in repairing concrete structures. So the fast freeze-thaw test is adopted, and mechanical behavior of FRP, adhesive behavior and bond behavior between FRP and concrete after the freeze-thaw cycle are analyzed. In addition, the effects of the freeze-thaw cycle on the concrete columns strengthened with FRP are studied. Carbon fiber reinforced polymer (CFRP) specimens subjected to freeze-thaw cycle show good durability with no significant degradation in tensile strength and modulus. However, glass fiber reinforced polymer (GFRP) specimens exhibit a little bit decrease in mechanical properties after freeze-thaw cycle. The bond strength between FRP and concrete decreases obviously after freeze-thaw cycle.

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