Reliability Calibration ofComposite Beam Section Based on European Standard

The necessary safety factor ofcomposite beam section in an ultimate limitstate (ULS) was investigated for the goal reliability indexβ= 4. 7. A composite beam section designed according to European standard EC 4 (Euro code 4) was calibrated and its actual safety factor in the ultimate limit statewas obtained. Comparison between the necessary safety factor and the actual safety factor shows that an additional safety factor is necessary for a composite beam section to ensure the reliability level demanded byEuropean standard EC 1 (Euro code 1).