Coupled CFD-FE analysis of a long-span truss beam exposed to spreading fires

• Fire simulations show a five-stage fire development in two different spread scenarios. A longer path increases the variability of temperature field space and time. Computationally efficient coupling enables analyses large frames complex The response frame is sensitive to its orientation with respect path. Coverage elevated temperatures along girders leads their load-bearing failures. This paper presents unidirectional methodology for combining simulation based on computational fluid dynamics (CFD) finite element (FE) analysis study long-span steel truss beams exposed non-uniform distributions. Dynamics Simulator (FDS) was used simulate scenarios, Abaqus FE analyses. Adiabatic surface from were transferred model using tool called FDS2FEM. validated experimental studies, it then analyse beam inside warehouse building travelling scenarios (fire perpendicular or beams) building. showed that load arrangement, ignition location distance ventilation opening determined severity thermal field, heterogeneity behaviour. efficiency scheme enabled structural large-scale structure under highly time- space-dependent exposure. indicated direction if either vertical lateral displacement at mid-span girder dominant. also long fields exhibits variety responses like bowing, oscillations, redistribution, local deformations, global failure.