Browse > Article
http://dx.doi.org/10.5762/KAIS.2013.14.7.3495

A Numerical Study on Inelastic lateral Torsional Buckling Strength of Doubly Stepped and Singly Symmetric I-Beam Subjected to Uniform Moment  

Park, Yi Seul (Department of Civil Engineering, College of Engineering, Sangmyung University)
Park, Jong Sup (Department of Civil Engineering, College of Engineering, Sangmyung University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.14, no.7, 2013 , pp. 3495-3501 More about this Journal
Abstract
The cross-sections of continuous multi-span beams are sometimes suddenly increased or stepped at the interior supports of continuous beams to resist high negative moments. This paper investigates inelastic lateral-torsional buckling of monosymmetric stepped I-beams subjected to pure bending. A three-dimensional finite-element program ABAQUS and a regression program were used to analytically develop new design equation. The flange thickness ratio, flange width ratio and stepped length ratio were considered as parameters of this study. The combined effects of residual stresses and geometric imperfection on inelastic lateral-torsional buckling of beams are considered. The proposed solution can be easily used to calculation for inelastic lateral torsional buckling strengths of monosymmetric beams with doubly stepped cross sections and to develop new design equations for inelastic lateral-torsional buckling resistances of stepped beams.
Keywords
Beam design; Doubly stepped beam; Inelastic buckling; Monosymmetric beam;
Citations & Related Records
연도 인용수 순위
  • Reference
1 American Institute of Steel Construction Load and Resistance Factor Design Specifications, 14th Edition, Chicago, Illinois. 2011.
2 S.P. Timoshenko and J.M. Gere, Theory of Elastic Stability, McGraw-Hill, New Youk, NY, 1961.
3 J.S. Park and J.M. Stallings, Lateral-Torsional Buckling of Stepped Beams, Journal of structural Engineering, Vol. 129, pp. 1457-1465, 2003. DOI: http://dx.doi.org/10.1061/(ASCE)0733-9445(2003)129:11(1457)   DOI   ScienceOn
4 ABAQUS, Standard User's Manual (Ver.6.7-2), Hibbit, Karlsson and Sorensen, Inc., 2007.
5 Y.L. Pi and N.S. Trahair, "Inelastic Torsion of Steel I-Beams," ASCE, Journal of structural Engineering, Vol. 121, pp. 609-620, 1995. DOI: http://dx.doi.org/10.1061/(ASCE)0733-9445(1995)121:4(609)   DOI   ScienceOn
6 J.W. Chang, S.J. Kim, J.S. Park, Y.J. Kang, "Study on Ultimate Behavior of Steel Tranmission Tower with Residual Stress and Initial Imperfection" Korean Sociaty of Steel Construction Journal, Vol.20, No.3, pp. 421-436, 2008.
7 Hyundai Steel, Allowable Imperfection(KS D 3502), 2006.
8 MINITAP 14 Korean, Statistic, Minitap Inc., 2006