Reliability of steel flexural members according to EC in serviceability limit state

To achieve a relatively consistent probability of failure for structural elements, most design codes apply reliability based code calibration process. Such approaches commonly focus on the ultimate strength of the structural members, which is related to the ultimate limit state (ULS). In the design of steel beams the performance of the structural elements is often limited by the serviceability requirements, which are related to the serviceability limit state (SLS) using different load combinations than those applied in the ultimate limit state. The current study aims to investigate the reliability for serviceability design for flexural steel members according to the specifications of the Eurocode. Second-order reliability method (SORM) is applied to determine the reliability index for different load ratios.