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Title |
Bond Behavior between Near-Surface-Mounted Fiber Reinforced Polymer Plates and Concrete in Structural Strengthening
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Keywords |
표면매입보강 ; FRP 판 ; 부착 실험 ; 매입 길이 ; 전단키 ; 할렬 파괴 ; 인발강도 near-surface-mounted rertofit(NSMR) ; FRP plate ; bond test ; embedment length ; shear key |
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Abstract |
Recently, in retrofit of RC structures using FRP (Fiber Reinforced Polymer), researches about Near-Surface-Mounted Rertofit (NSMR) method have been widely performed. In NSMR, FRP bar is normally inserted in the slit formed in the cover concrete and then bonded by using epoxy mortar. In this paper, the bond characteristic of NSMR using FRP plate instead of bar was studied experimentally. Fracture behavior is observed from bond test using the parameters of embedment length, shear key, and FRP plate layer. In addition, an equation to predict the splitting strength of NSMR using FRP is proposed using the test result. The results showed that when the longer embedment length and more layers of FRP are used, the higher bond strength is achieved. There was a good co-relationship between the test and calculated results using the proposed equation.
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