Flexural Behavior of Reinforced Concrete Beams Strengthened with Grid-typs Carbon Fiber Plastics

J. Ocean Eng. Technol. 2000;14(1):52-59.

탄소격자섬유로 보강한 철근 콘크리트보의 휨파괴 특성에 관한 연구

태기호

한양대학교 토목공학과

Keywords: Carbon gird fiber, Strengthening effect, Separation failure, Anchor bolt effect, Strengthening desigen

핵심용어: 탄소격자섬유, 보강효과, 계면파괴, 앵커볼트효과, 보강설계

Abstract

Flexural fracture characteristics of newly-developed Grid-type carbon fiber plastics in the deteriorated reinforced concrete structures were investigated by the four-points fracture test to verify the strengthening effects in the beam specimens.
Results
showed that initial cracks appeared in the boundary layers of fibers embedded in the newly-placed mortar concrete slowly progressed to the direction of supports and showed fracture of fiber plastics and brittle failure of concrete in compression in sequence after the yielding of steel reinforcement. Accordingly the reasonable area of Grid-type carbon-fiber plastics in the strengthening design of deteriorated RC structures should be limited and given based on the ultimate strength design method to avoid the brittle failure of concrete structures.