Lateral-Torsional Buckling of Beams Elastically Restrained and Loaded with Concentrated Moments at Supports

摘要

The study presents the results of theoretical investigations into lateral-torsional buckling(LTB)of free supported bi-symetric I-beams,elastically restrained against warping at supports.Beams with loaded by moments focused at supports(with a variable the ratio of moments)and with different types of ribs were taken into account.To determine the critical moment(Mcr)of LTB of beams,the Mltb.el program [7] and proposed in this article formula were used.The obtained results were compared with the results received from approximation formulas [6] and with FEM(LTBeam,Abaqus).