Reference : A new proposal of a simple model for the lateral-torsional buckling of unrestrained stee...
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/41065
A new proposal of a simple model for the lateral-torsional buckling of unrestrained steel I-beams in case of fire: experimental and numerical validation
English
Vila Real, Paolo mailto [> >]
Piloto, Paolo mailto [> > > >]
Franssen, Jean-Marc mailto [Université de Liège - ULg > Département Argenco : Secteur SE > Ingénierie du feu >]
Feb-2003
Journal of Constructional Steel Research
Elsevier Sci Ltd
59
2
179-199
Yes (verified by ORBi)
International
0143-974X
Oxford
[en] steel beams ; lateral-torsional buckling ; fire ; new proposal ; numerical and experimental validation
[en] The behaviour of Steel I-Beams exhibiting lateral-torsional buckling at elevated temperature has been studied by means of experimental and numerical analysis. The authors in an earlier paper have presented an analytical formula for the buckling resistance moment in the fire design situation. This new proposal, different from the actual proposal of the Eurocode 3 Part 1.2 has been validated in this work by comparison with the results from a set of 120 experimental and numerical tests performed on IPE 100 beams, submitted to temperatures varying from room temperature to 600 degreesC. The numerical simulations have been based on the measured geometrical dimensions of the cross-sections, the longitudinal imperfections, i.e. the out of straightness of the beams, the residual stresses and the yield strength. The Eurocode simple model promotes ultimate loads that depend mainly on the non-dimensional slenderness of the beams. The analytical results provided by the Eurocode 3, for a certain range of the slenderness, appear to be unsafe when compared with the numerical and experimental results. It is shown that the new proposal is safer than the Eurocode 3 formulas. (C) 2002 Elsevier Science Ltd. All rights reserved.
Researchers ; Professionals
http://hdl.handle.net/2268/41065
10.1016/S0143-974X(02)00023-8
(C) 2002 Elsevier Science Ltd. All rights reserved.

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