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1- Ph.D, Faculty of Science and Technology, Civil Engineering Department, University of Tebessa, BP 02, route de Constantine, Tébessa 12000, Algeria. , bakerwael.abuteir@univ-tebessa.dz
2- Senior lecturer in steel structures, Faculty of Science and Technology, Civil Engineering Department, University of Tebessa, BP 02, route de Constantine, Tébessa 12000, Algeria.
Abstract:   (304 Views)
In this paper, a parametric numerical study is carried out to assess the performance to Lateral-torsional buckling (LTB) of several semi-compact beams: S1, S2 and S3. The carrying capacity of these beams predominantly loaded in bending is approached by elastic and inelastic buckling analyses. A series of parameters that are believed to influence the resistance to LTB of class 3 beams to (EC3) steel I-beams namely : bouandary conditions, flange thickness, load application level are investigataed. An eigenvalue analysis which predicts the theoretical buckling strength through 3D computational models of elastic beam is first conducted by means LTBEAM software and ABAQUS. A very good agreement in the prediction of Mcr was found. Then, a parmetric inelastuc buckling analysis is performed using Riks method implanted in ABAQUS. Results have shown the importance of the lateral restraint conditions and the transverse stiffeners to LTB resistance of compressive flange slendreness in accordance to EC3-1-1 for cross sections with a class 3 web and class 1 or 2 flange. In addition, an interaction of local buckling (LB) and LTB in the flanges was observed exclusively for restrained beams. The level of the applied load effects strongly the elastic and inelastic resistance of beams to LTB.
 
     
Type of Study: Research | Subject: General
Received: 2022/06/22 | Revised: 2022/10/23 | Accepted: 2022/10/31 | ePublished ahead of print: 2022/10/31

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