Steel Buildings in Europe

Part 7: Fire Engineering 7 - 10 4 GUIDANCE ON APPROPRIATE FIRE ENGINEERING SOLUTIONS 4.1 Field of application of different design methods The following table shows the field of application of the available fire design methods, considering either design according to prescriptive requirements based on the standard fire or a performance-based fire design [11] . Table 4.1 Field of application of different design methods Approach Tools Thermal actions Thermal modelling Structural modelling Pre-engineered data from standard fire tests (Data from manufacturers) Tabulated data from EN 1994-1-2 EN 1994-1-2, §4.2 Steel EN 1993-1-2 §4.2.5 Steel EN 1993-1-2 §4.2.3 §4.2.4 Simplified calculation models given in Eurocodes Composite EN 1994-1-2 §4.3 Steel and composite Prescriptive approach (Standard fire design) Advanced calculation models Standard ISO curve EN 1991-1-2 FEA* or FDA** FEA* Simplified calculation models Fully engulfed fire (Parametric fire, standard ISO curve***) Localized fire Steel EN 1993-1-2 §4.2.5 Steel EN 1993-1-2 §4.2.3 §4.2.4 Specific rules based on fully engulfed fire §5.4 Steel and composite Performance based approach (natural fire design) Advanced calculation models Zone models Field models FEA* or FDA** FEA* *FEA : Finite element Analysis **FDA : Finite Difference analysis *** Collapse of single-storey buildings usually occurs when the building structure (a part of it or the whole structure) is fully engulfed in fire. In such fire condition, because the gas temperature rise has no significant effect on the failure mode of the building structure, a performance-based approach referring to thermal actions based on standard fire curve is appropriate to investigate the fire behaviour of single-storey buildings. This approach can be used to demonstrate the non-progressive collapse and the failure inwards of the building structure.