FEM Study of a Steel Corrugated Web Plate Girder Subjected to Fire

Abstract The main aim of this work is a computational nonlinear analysis high strength steel corrugated-web plate girder with very detailed and realistic mesh including vertical ribs, all the fillet welds supporting areas. carried out to verify mechanical structural response under transient fire temperature conditions accounting for an efficiency accuracy three various coupled thermo-elastic models. All resulting stress distributions, deformation modes their time variations, critical loads eigenfrequencies as well failure times are compared in these Nonlinearities include material, geometrical contact phenomena up fluctuations together temperature-dependent constitutive relations steel. They result partially from steady state experimental tests or additional designing rules included Eurocodes. A scenario includes application normative gas curve on bottom flange entire period 180 minutes. It computed using sequentially Finite Element Method analyses. These account heat conductivity, radiation convection. FEM model consists combination 3D hexahedral tetrahedral solid finite elements uses material physical parameters, whose values taken after experiments presented Numerical results here demonstrate fundamental role lower carrying according show contribution ribs structure.