Percorrer por autor "Benyettou, Sabrina"
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- Numerical analysis of lateral torsional buckling of steel i-beams with and without web-openings under firePublication . Benyettou, Sabrina; Kada, Abdelhak; Lamri, B.; Mesquita, L.M.R.During the last decade, there has been great concern about fire applied loading effect on structural steel frames and their elements, especially when instability phenomenon arises due to high temperatures [1].The objective of this paper is to study the fire behaviour of I-beam steel simply supported members with and without web openings under lateral torsional buckling accounting geometric imperfection and residual stress.
- Numerical analysis of lateral torsional buckling of steel i-beams with and without web-openings under firePublication . Benyettou, Sabrina; Kada, Abdelhak; Lamri, B.; Mesquita, L.M.R.Steel structures are being widely used in construction industry owing to their excellent structural flexibility and to their high ductility to withstand lateral forces. However, for the case of solid and cellular steel beams, high temperature effect may result in different fire response for each case due to a great reduction of yield stress and Young’s modulus. Moreover, when the beams are not restrained, lateral torsional bending phenomenon which are bound to take place is made worse in the case of fire. The aim of this study is to analyse the behaviour of steel beams with and without web openings when taking into account the effect of geometry and material imperfections. The results from the finite element models produced lateral and vertical displacements as well as the buckling moments.