Comparison of Simplified and Advanced Design of Steel Structures in Fire


Article Preview

This paper presents the possible deviations between “realistic” (performance-based) calculations of fire resistance of steel structures and corresponding calculations made by one of the often used simplified (prescriptive) procedures of EN 1993-1-2 i.e. the method of critical temperature (MCT). The comparison is done for a case of an assembly consisting of a steel beam and a steel girder connected to each other by a bolted fin-plate connection. For such structure the MCT method suggests that the structural fire resistance is 50 minutes. However, the realistic fire resistance calculated by an advanced performance-based procedure is evaluated to 44 minutes. Although the discrepancy between the results of both methods is not significant in the presented case, this finding implies that MCT can be on the unsafe side for some cases. More future debates and clarifications are therefore encouraged regarding the actual limits of the applicability of the simplified procedures.



Edited by:

Prof. Mosbeh Kaloop




J. Kolšek and A. Rebec, "Comparison of Simplified and Advanced Design of Steel Structures in Fire", Advanced Materials Research, Vol. 1147, pp. 24-29, 2018

Online since:

May 2018




* - Corresponding Author

[1] EN 1993-1-2, Design of steel structures, Structural fire design. European Committee for Standardization; (2004).

[2] F. Wald, L. S. da Silva, D. B. Moore, T. Lennon, M. Chladna, A. Santiago, et al. Experimental behaviour of a steel structure under natural fire. Fire. Saf. J. 41 (2006) 509–522.


[3] J. Kolšek, P. Češarek, Performance-based fire modelling of intumescent painted steel structures and comparison to EC3, J. Constr. Steel. Res. 104 (2015) 91–103.


[4] M. E. Garlock, S. Selamet, Modeling and behavior of steel plate connections subject to various fire scenarios. J. Struct. Eng. 136 (2010) 897–906.


[5] ABAQUS version 2016; Documentation, DS-Simulia. Providence, R.I.: AISC. (2016).

[6] Kirby B.R. The behavior of high-strength grade 8.8 bolts in fire. J. Constr. Steel. Res. 33 (1995) 3–38.

[7] EN 1363-1, Fire Resistance Tests, Part 1: General Requirements, European Committee for Standardization. (2012).

Fetching data from Crossref.
This may take some time to load.