Author(s)

P.A.G. Piloto, P.M.M. Vila Real, J-M. Franssen

Abstract

Numerical and experimental evaluation of lateral torsional buckling of beams at elevated temperatures P.A.G. Piloto', P.M.M. Vila Real*, J.-M. Franssen' * Mechanical Department, Polytechnic of Bragan^a, Portugal *Civil Department, University of Aveiro, Portugal * Civil Department, University of Liege, Belgium. Abstract When a beam is bent about its greatest flexural resistance axis it may twist and move laterally, before it reaches its strength limit. Although this problem of lateral torsional buckling of steel beams at room temperature is well known, the same problem at elevated temperature is not. This paper summarises the results obtained in the scope of a research project entitled "Lateral buckling of steel I beams under fire conditions", where a set of 120 experimental and numerical tests were performed on IPE100 beams, submitted to temperatures varying from 20 °C to 600 °C, to validate a new proposal for the buckling resistance moment of a laterally unrestrained be

Keywords