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Title |
Reinforcement Effect of Reinforced Concrete Beams Strengthened with Grid-type Carbon Fiber Plastics
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Keywords |
탄소격자섬유; 보강효과; 박리파괴; 앵커볼트효과; 보강설계; carbon grid fiber; strengthening effect; separation failure; anchor bolt effect; strengthening design |
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Abstract |
Flexural characteristics of the R.C beams strengthened with newly-developed grid-type carbon fiber plastics(CFRP-GRIDS) were investigated. The tests were conducted under the four-points load to the failure to investigate the strengthening effects of CFRP-GRIDS on the beams. 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 appropriate 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
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