비부착 방식으로 CFRP 판을 외부 긴장하여 보강한 R.C. 보의 보강성능 해석

F.E. Analysis of R.C. Beams Strengthened by Prestressed CFRP Plate with Unbonded System

Strengthening by bonded CFRP sheet/plate onto the surface has been generally used for the R.C. beams. The strengthening efficiency of this system depends on the performance of the adhesive interlace between the beam and the CFRP, and the interlace often causes unexpected failure. In this paper, an unbonding system is proposed with prestressed CFRP. Finite element analysis has been conducted using DIANA for the R.C. beams strengthened by prestressing the unbonded CFRP plate. The results of analysis were compared with those of experiment.