재하상태를 고려한 탄소섬유 보강공법의 전단 보강 효과

Shear Strengthening Effect of Pre-loaded RC Beams Strengthened by CFS

This paper was aimed to investigate the shear strengthening effect of the pre-loaded reinforced concrete beams strengthened by carbon fiber sheet (CFS). Main tet parameters was the magnitude of pre-loading at the time of the retrofit and the strengthening method of carbon fiber sheet. A series of nine specimens was tested to evaluate the corresponding effect of each parameters such as maximum load capacity, load-deflection relationship, and failure mode. The results of this study showed that the failure mode is bonding failure between the concrete and the CFS before the tensile failure strain of the CFS is reached.