• Approximate Analysis of Non-Uniform Torsion (No. R968) 

      Trahair, Nicholas S.; Papangelis, John
      Published 2021
      It is difficult to obtain closed form exact solutions for the non-uniform torsion of beams. Advanced finite element methods easily produce very accurate solutions, but simple programs are not widely available. One simple ...
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    • Behaviour of Single Angle Steel Beams (No. R884) 

      Trahair, Nicholas S.
      Published 2007
      A single angle steel beam is commonly loaded eccentrically in a plane inclined to the principal planes (Fig. 1), so that the beam undergoes primary bending and shear about both principal axes, torsion, and bearing at the ...
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    • Bending and Buckling of Tapered Steel Beam Structures (No. R939) 

      Trahair, Nicholas S.
      Published 2013
      This paper describes an efficient finite element method of analysing the elastic in-plane bending and out-ofplane buckling of indeterminate beam structures whose members may be tapered and of mono-symmetric I cross-section. ...
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    • Bending, Shear and Torsion Capacities of Steel Angle Sections (No. R810) 

      Trahair, Nicholas S.
      Published 2001-01-01
      Steel angle sections are commonly used as beams to support distributed loads which cause biaxial bending and torsion. However, many design codes do not have any design rules for torsion, while some recommendations are ...
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    • Biaxial Bending and Torsion of Steel Equal Angle Section Beams (No. R852) 

      Trahair, Nicholas S.
      Published 2005
      Although steel single angle sections are commonly used as beams to support distributed loads which cause biaxial bending and torsion, their behaviour may be extremely complicated, and the accurate prediction of their ...
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    • Biaxial Bending of Steel Angle Section Beams (No. R822) 

      Trahair, Nicholas S.
      Published 2002
      The loads applied to angle beams usually act out of the principal planes so that they cause simultaneous biaxial bending about both principal axes. The general practice for designing unbraced beams against biaxial bending ...
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    • Buckling Analysis Design of Steel Frames (No. R891) 

      Trahair, Nicholas S.
      Published 2008-01-01
      Steel design codes do not provide sufficient information for the efficient design of steel structures against out-of-plane failure, and what is provided is often overly conservative. The method of design by buckling ...
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    • Buckling and Torsion of Steel Angle Section Beams (No. R833) 

      Trahair, Nicholas S.
      Published 2003
      Although steel single angle sections are commonly used as beams to support distributed loads which cause biaxial bending and torsion, their behaviour may be extremely complicated, and the accurate prediction of their ...
      Open Access
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    • Design of Steel Equal Angle Lintels (No. R890) 

      Trahair, Nicholas S.
      Published 2008-01-01
      Single equal angle steel beams are often used as lintels to support eccentric loading acting normal to one flange. This loading causes combined biaxial bending and torsion, which is not allowed for in most steel design ...
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    • Distortional Buckling of Overhanging Monorails (No. R906) 

      Trahair, Nicholas S.
      Published 2009
      This paper is concerned with the elastic lateral-distortional (LD) buckling of overhanging steel monorail I-beams and its influence on their design strengths. Distortion of a slender web reduces the elastic buckling ...
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    • Exact and Approximate Solutions for the Flexural Buckling of Columns with Oblique Rotational End Restraints (No. R834) 

      Rasmussen, Kim J.R.; Trahair, Nicholas S.
      Published 2004
      This report is concerned with the elastic flexural buckling of doubly symmetric columns with oblique restraints under concentric loading. Oblique restraints cause coupling between the principal axis deflections and rotations, ...
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    • Finite Element Analysis of The Flexural Buckling of Columns with Oblique Restraints (No. R835) 

      Trahair, Nicholas S.; Rasmussen, Kim J.R.
      Published 2004
      This paper is concerned with the elastic flexural buckling of doubly symmetric columns with oblique restraints under concentric loading. Oblique restraints cause coupling between the principal axis deflections and rotations, ...
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    • Flexural-Torsional Buckling of Columns with Oblique Eccentric Restraints (No. R841) 

      Trahair, Nicholas S.; Rasmussen, Kim J.R.
      Published 2004
      This paper is concerned with the elastic flexural-torsional buckling of concentrically loaded columns with oblique eccentric restraints. Oblique flexural restraints may resist deflections as well as flexural rotations, ...
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    • In-Plane Behaviour of Mono-Symmetric Tapered Beams (No. R957) 

      Trahair, Nicholas S.; Ansourian, P.
      Published 2015
      Shear stress distributions in mono-symmetric tapered I-beams are incorrectly predicted by the conventional beam analysis method used for uniform beams. More accurate predictions are obtained by assuming that the normal ...
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    • In-Plane Behaviour of Web-Tapered Beams (No. R956) 

      Trahair, Nicholas S.; Ansourian, P.
      Published 2015
      Shear stress distributions in tapered web I-beams are incorrectly predicted by the conventional beam analysis method used for uniform beams. More accurate predictions are obtained by adopting the finding for wedges that ...
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    • Inelastic Buckling of Monosymmetric I-Beams (No. R920) 

      Trahair, Nicholas S.
      Published 2011
      Methods of designing steel monosymmetric I-beams against lateral buckling are not well supported by research. For this paper, the inelastic buckling of monosymmetric steel I-beams under moment gradient was studied and ...
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    • Interaction Buckling of Tapered Beams (No. R955) 

      Trahair, Nicholas S.
      Published 2013
      There have been comparatively few studies of the elastic lateral buckling of braced or continuous tapered beams, and these are limited in their application. Lateral buckling is affected by the separate effects of moment ...
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    • Lateral Buckling of Monorail Beams (No. R883) 

      Trahair, Nicholas S.
      Published 2007
      The resistances of steel I-section monorail beams to lateral buckling are difficult to assess because monorails are often not well restrained against twisting. Monorails are supported at intervals along the top flange, but ...
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    • Lateral Buckling Strengths of Steel Angle Section Beams (No. R812) 

      Trahair, Nicholas S.
      Published 2002
      The design of unbraced steel angle section beams against biaxial bending and torsion requires the ability to predict their lateral buckling strengths when bent about the major principal axis. Present design code formulations ...
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    • Lateral-Distortional Buckling of Monorails (No. R898) 

      Trahair, Nicholas S.
      Published 2009-01-01
      This paper is concerned with the elastic lateral-distortional (LD) buckling of single span steel monorail I-beams and its influence on their design strengths. The distortion of a slender web reduces the elastic buckling ...
      Open Access
      Report, Research