Numerical Study of Lateral – Torsion Stability of Thin – wall Beams with Cut–out in Web

Document Type : Research Article

Authors

Abstract

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.
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.

Keywords

References

[1]Redwood, R.G. & Uenoya, M., "Critical Loads for Webs with Holes", Journal of the Structural Division,ASCE, VOL. 105, No.ST10, Proc. Paper14925, Oct.,1979, pp.2053-2067
[2]Coul, A. & Alvarez, M.C., "Lateral Buckling of Beams Containing Openings", Thesis presented to the University of Strathclyde, at Glasgow, Scotland,1978, in partial fulfillment of the requirements for the degree of master of science
[3]Thevendran, V. & Shunmugam, N.E., "Lateral Buckling of Narrow Rectangular Beams Containing openings", Journal of Computers and Structures, V0l.43, No. 2, 1992, pp. 247-254
[4]Chen, W.F. and Lui, E.M., "Structural Stability, Theory and Implementation", 1st Edition, Elsevier,1987
[5]Tong, G. and Zhang, L., "A new derivation of the buckling theory of thin walled beams", Journal of Advances in Stell Structures, ICASS, 2002,pp129-137
[6]Chu, X. and Rickard, J. and Li, L., "Influence of lateral restrain on lateral tortional buckling of cold formed steel purlins", Journal of Thin-Walled Structures, V. 43, Issue 5, 2005, pp800-810
Amirkabir Journal of Civil Engineering
Volume 41, Issue 2 - Serial Number 2
February 2009
Pages 63-71

Files

Share

How to cite

Statistics