LAUSR

Abstract This study aims to present an approach to investigate the reliability levels of reinforced concrete (RC) columns confined by Fiber Reinforced Polymers (FRP) subjected to concentric loading. First, the statistical properties of random variables such as model error, FRP strain efficiency factor (FSE factor) and axial resistance of columns are investigated. Then in respect to the existing correlation between variables and extensive collected database, an appropriate probabilistic model for model error, FSE factor and compressive resistance of RC column is proposed. In addition, the effects of live-to-dead load ratio, reinforcement ratio and the confinement levels on the reliability of FRP-confined columns are studied through a reliability analysis. Furthermore, based on existing studies, reliability indices for various levels of confinement are calculated. Finally, a calibration analysis on safety factors of ACI 440.2R-17 guideline and shape factor of rectangular cross-section is presented.