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Title |
Retrofit Capacity of Near-Surface-Mounted RC Beam by using FRP Plate
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Keywords |
FRP ; 표면매입 보강 ; 표면부착 보강 ; 철근콘크리트 보 ; 휨보강 FRP ; Near-Surface-Mounted retrofit ; Surface-Bonding retrofit ; Reinforced concrete beam ; Flexural retrofit |
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Abstract |
Recently, research about Near-Surface-Mounted Rertofit (NSMR) method has been being widely performed as a method for retrofit of RC structure using FRP. This method requires additional work to make grooves during retrofit but makes it possible to improve retrofit effect and reduce the attack by environment. In this paper, the retrofit effect of NSMR method, especially the method using FRP plate instead of bar is investigated through experiment. Six RC beams were made and retrofitted using by FRP plate following the planned methods; Surface-Bonding Retrofit (SBR), NSMR without debonding region and NSMR with debonding region. Flexural capacity of all specimens was evaluated by beam test with simple support condition. As a result, NSMR method with FRP plate had more improved structural capacity than SBR method. The calculation process of ACI 440-2R can be used to predict the member retrofitted by NSMR with FRP plate with consideration on the three anchorage failure mechanism.
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