Numerical investigation of structural behavior of steel frames under fire load

This thesis deal with numerical investication of structural behavior of steel frames under fire load. In order to examine the fire resistance of the most widely used trusses (portal frame, truss frame) in industrial structures, two industrial structures belonging to different types of trusses were designed under static and dynamic loads in SAP2000 program first. As a result of the analysis, sections were determined and subjected to fire effect according to ISO 834 standard in this WIZARD program.Trusses systems were modeled using GID interface program and fire analyses were performed in The SAFIR program. In this way, the resistance stipulated against fire of different types of trusses used in industrial structures was obtained and necessary comparisons were made. Key Words: Steel frames, Yield stress, Resistance time, Fire load, Collapse period.