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.

本研究旨在提出一种方法来研究受同心载荷的纤维增强聚合物(FRP)约束的钢筋混凝土(RC) 柱的可靠性水平。一、模型误差、FRP应变效率因子（FSE因子）、轴向阻力等随机变量的统计特性列进行了调查。然后针对变量之间存在的相关性和广泛收集的数据库，提出了模型误差、FSE因子和RC柱抗压强度的合适概率模型。此外，通过可靠性分析，研究了活死荷载比、配筋率和约束水平对FRP约束柱可靠性的影响。此外，根据现有研究，计算了各种限制级别的可靠性指标。最后，给出了ACI 440.2R-17指南的安全系数和矩形截面形状系数的校准分析。