탄소섬유(炭素纖維)시트로 보강(補强)된 철근(鐵筋)콘크리트 기둥의 강도특성(强度特性)에 관한 연구(硏究)

A Study on the Strength Characteristics of Reinforced Concrete Columns Confined with Carbon Fiber Sheets

Lateral confinement pressure generate improvements in strength and ductility of confined concrete. Carbon fiber sheets have a lot of merits, such as light weight, high strength and ease for construction, when it is applied to the defected structural member for the strengthening of shear and flexure. The purpose of this experimental study is to evaluate the strength characteristics of the reinforced concrete column confined with carbon fiber sheets. The main variables in this test are concrete strength ($290kgf/cm^2$ called N type, $505kgf/cm^2$ called H type) and pre-loading. In the test, a total of twelve specimens, which were all $10{\times}10cm$ in size, 117 cm in length, have a 2.85 reinforcement ratio, have been used. The results indicate that the strength was enhanced 26%~30% in N type, 11%~16% in H type specimens which was confined with carbon fiber sheets.