Abstract:In order to analyze the reliability of circular hollow concrete filled steel tube short column under axial compression, the experimental results as well as the data sets from literatures were collected. The model errors were taken into consideration via Normal, Lognormal, Weibull, Gamma distribution assumptions. Reliability analysis was carried out based on Technical Code of Concrete Filled Steel Tube Structure and the modified formula presented by the authors. Monte Carlo sampling was also performed and the calculated reliabilities satisfy the target reliability index. The reliability index of the code formula is greater than that of the modified formula within 5%. As the concrete strength and loading ratio increase, the reliability index increases. The reliability index decreases with the reduced steel ratio. The hollow ratio and steel strength have marginal influence on the reliability index. Parameter analysis was also carried out in considering the influence of model error distribution types, which indicated that mode error and live load type have less significant influence on partial factor of resistance, than the safety levels and the loading ratio. The partial factor of resistance under different loading ratios should be 1.21, 1.32 and 1.41, respectively.