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http://dx.doi.org/10.4334/JKCI.2004.16.4.493

Analytical Research on Flexural Strengthened by FREP of RC Structure  

Kang Sung-Hoo (Dept. of Civil Engineering, Dongshin University)
Park Sun-Joon (Dept. of Civil Engineering, Dongshin University)
Kim Min-Sung (Dept. of Civil Engineering, Dongshin University)
Publication Information
Journal of the Korea Concrete Institute / v.16, no.4, 2004 , pp. 493-500 More about this Journal
Abstract
FREP(Fiber Reinforced Epoxy Panel) are used for strengthening the damaged RC beams due to its good tensile strength, low weight, resistance to corrosion, and easy applicability. This study sets up structure equation for FREP bending reinforcement before and during the usage of RC beam. It finds the difference and finds the mechanical characteristics of rip-off failure that is caused by stress concentration in reinforcement material cutting part to estimate the performance of bending reinforcement. The result of this research can be summarized as two main consequences. The main failure of FREP reinforced concrete beam is rip-off failure and it evaluated rip-off failure of RC reinforcing bean based on the test and analytical conditions of this study. It found that stress was concentrated due to rapid change of bending rigidity in reinforced cutting part as a result of excessive reinforcement thickness of FREP. It resulted in rip-off failure. It means that it should evaluate the rip-off failure when designing reinforcement. It analyzed the reinforcement effect according to reinforced period for FREP. It found that reinforcement effect of P-Type that was reinforced during the usage decreased compared to I-Type that was reinforced before the usage. So when reinforcing a existing structure that is being used, it should consider the stress that is produced due to the fixed load.
Keywords
FREP; flexural reinforcement; rip-off failure; reinforcement design algorithm;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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