Benyettou, SabrinaKada, AbdelhakLamri, B.Mesquita, L.M.R.2020-04-062020-04-062019Benyettou, S.; Kada, A.; Lamri, B.; Mesquita, L.M.R. (2019). Numerical analysis of lateral torsional buckling of steel i-beams with and without web-openings under fire. In 5º CILASCI – Congresso Ibero-Latino-Americano sobre Segurança contra Incêndio. Porto, Portugal978-989-97210-4-3http://hdl.handle.net/10198/21520During 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.engCellular beamImperfectionsLateral torsional bucklingFinite element modelFireconference object