- English
- فارسی
ABS Ilia
Repairing or strengthening of structural members is required in many cases to prevent damages caused by seismic loading. The application of fiber reinforced polymer (FRP) composites has been successfully promoted for external strengthening of reinforced concrete (RC) members such as RC columns. These jackets are commonly formed in a wet layup process for confinement of columns. It has been well established in recent studies that the rupture strains (or strengths) of FRP measured in tests on such FRP-confined RC columns fall substantially below those from flat coupon tensile tests. Furthermore, this problem is more important in rectilinear columns because of premature rupture of FRP at corners due to stress concentration at these parts. Up to now, numerous studies have been conducted on FRP confined rectangular columns to improve the efficiency of composite in confinement; such as rounding corners or using vertical strips as a local reinforcement at corners.
In this study, a new method was investigated as using CFRP strips at corners and CFRP battens at sides. In the method, FRP composite does not experience any curvature in confining section and the behavior of FRP is very close to flat coupons in tensile tests. For this purpose, twenty-five RC columns with
Key Words
Confinement, CFRP composite, Rectilinear RC column, Corner strip, FRP batten, Uniaxial compression.