Fire design of steel members with welded ot hot-rolled class 4 cross-section (FIDESC4) : final report

The main aim of the current project was to develop accurate, practical and economic simple design rules for fire resistance assessment of class 4 cross-section steel members through enhanced scientific findings on the basis of both experimental and numerical investigations. In the scope of this project, the following main outcomes have been acquired: Experimental investigation of class 4 cross-section steel members under various loading conditions, such as simple bending, bending subject to lateral torsional buckling, axial compression subjected to buckling and combined compression and bending; Development and validation investigation of numerical models against fire tests and conduct of extensive numerical parametric studies; Development of new simple design rules to assess the fire resistance of class 4 cross-section steel members under different loading conditions on the basis of the results derived from both experimental investigation and numerical parametric studies as well as the detailed correlation investigation of these design rules; Development of a user-friendly software so that all above simple design rules can be applied cost-effectively by design engineers; Elaboration of a numerical guidance dealing with the global structural analysis under fire situation of steel structures composed of class 4 crosssection steel members on the basis of cost-effective numerical approach; Establishment of a common database comprising all the necessary information relative to the experimental investigation and numerical parametric studies for future exploitation by any other researchers The principal information of above outcomes is provided in the main part of this report and all the important details are explained in several separate deliverables.