Amirkabir University of Technology Amirkabir Journal of Civil Engineering 2588-297X 41 2 2010 01 21 Numerical Study of Lateral – Torsion Stability of Thin – wall Beams with Cut–out in Web Numerical Study of Lateral – Torsion Stability of Thin – wall Beams with Cut–out in Web 63 71 288 10.22060/ceej.2010.288 FA B. Poursartip M. Z. Kabir Journal Article 2014 03 17 One of the main challenges in designing of thin-walled open section beams is lateral-torsion buckling mode. Due to the access for piping, electrical and other devices, inserting cut-outs in web are inevitable. <br />This paper deals with the effects of different parameters in lateral-torsion buckling of plate girders. Lateral-torsion buckling loads of more than 700 plate girders are calculated with opening in different shapes, dimensions and locations by Ansys5.4 . The study is performed using numerical approach and the results are compared together. Three kinds of cut-outs including square, circular and hexagonal are selected. An extensive parametric studies is conducted to study the influence of cut-out dimensions, thickness, area, location and distribution along the beam length. Finally optimum scheme is obtained in order to have better estimation load carrying capacity of open-section beam. One of the main challenges in designing of thin-walled open section beams is lateral-torsion buckling mode. Due to the access for piping, electrical and other devices, inserting cut-outs in web are inevitable. <br />This paper deals with the effects of different parameters in lateral-torsion buckling of plate girders. Lateral-torsion buckling loads of more than 700 plate girders are calculated with opening in different shapes, dimensions and locations by Ansys5.4 . The study is performed using numerical approach and the results are compared together. Three kinds of cut-outs including square, circular and hexagonal are selected. An extensive parametric studies is conducted to study the influence of cut-out dimensions, thickness, area, location and distribution along the beam length. Finally optimum scheme is obtained in order to have better estimation load carrying capacity of open-section beam. https://ceej.aut.ac.ir/article_288_560139b367582d09a4525bf4264c156c.pdf