CFRP 보강공법에 따른 RC보의 휨성능 개선효과

Development of Flexural Capacity of RC Beam by CFRP Strengthening Methods

Experimental research was conducted to investigate the characteristic of various CFRP strengthening methods. A total of 4 specimens of 3.3m length were tested in four point bending after strengthening them with externally bonded CFRP plates. The CFRP plates were bonded without prestress or with prestress levels of CFRP plate strain $0.5\%$. The non-prestressed specimen without anchor plate failed by separation of the plate from the beam due to premature debonding while the non-prestressed specimen with anchor plate failed by CFRP fracture and showed the significant increase of ductility capacity. In addition, the prestressed specimens failed by concrete compression failure. The maximum load and ductility capacity were most significantly increased.