Elastic lateral buckling of simply supported LiteSteel beams subject to transverse loading

Kurniawan, Cyrilus Winatama; Mahendran, Mahen

doi:10.1016/j.tws.2008.05.012

Cited by 31 publications

(17 citation statements)

References 8 publications

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“…In these regions, the buckling analysis results indicate that they are associated with a lateral distortional buckling (LDB) mode as shown in Figure 8(b), which may indicate that the limitation in the benefits is due to the web distortion effect. This is different compared to the case of simply supported beams with a transverse load where the unfavourable web distortion effect generally starts at lower K e values of about 0.3 (Kurniawan and Mahendran, 2008).…”

Section: Non-uniform Moment Distribution Effect Of Transverse Loadingmentioning

confidence: 61%

“…A finite element model of cantilever LSB was developed using ABAQUS (HKS, 2005), which was a modification of the earlier model developed by Kurniawan and Mahendran (2008) This element is a thin, shear flexible, isoparametric quadrilateral shell with four nodes and five degrees of freedom per node, utilizing reduced integration and bilinear interpolation schemes. An element size of 5 mm x 10 mm was used to provide adequate accuracy based on convergence studies (Figures 3 and 4).…”

Section: Finite Element Model Of Cantilever Lsbsmentioning

confidence: 99%

“…Kurniawan and Mahendran (2008) used a similar finite element model to investigate the lateral buckling behaviour of simply supported LSBs. They verified the accuracy of the finite element model by comparing their elastic buckling analysis results of LSBs subject to a uniform moment with the solutions obtained from finite strip analyses based on Thin-Wall (Hancock and Papangelis, 1994), and the elastic lateral distortional buckling moment equation (Eq.…”

Section: Validation Of the Finite Element Modelmentioning

confidence: 99%

“…The applicability of these factors for the cold-formed mono-symmetric LSBs subject to lateral distortional buckling is not known. Therefore Kurniawan and Mahendran (2008) investigated the moment distribution and load height effects of transverse loading for LSBs, and the suitability of the current steel design code methods.…”

Section: Introductionmentioning

confidence: 99%

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Elastic lateral buckling of cantilever Litesteel Beams under transverse loading

Kurniawan

Mahendran

2011

Int J Steel Struct

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ABSTRACT:The LiteSteel Beam (LSB) is a new hollow flange channel section developed by OneSteel Australian Tube Mills using its patented dual electric resistance welding and automated continuous roll-forming technologies. The LSB has a unique geometry consisting of torsionally rigid rectangular hollow flanges and a relatively slender web. Its flexural strength for intermediate spans is governed by lateral distortional buckling characterised by simultaneous lateral deflection, twist and web distortion. Recent research on LSBs has mainly focussed on their lateral distortional buckling behaviour under uniform moment conditions. However, in practice, LSB flexural members are subjected to non-uniform moment distributions and load height effects as they are often under transverse loads applied above or below their shear centre. These loading conditions are known to have significant effects on the lateral buckling strength of beams. Many steel design codes have adopted equivalent uniform moment distribution and load height factors based on data for conventional hot-rolled, doubly symmetric I-beams subject to lateral torsional buckling. The non-uniform moment distribution and load height effects of transverse loading on cantilever LSBs, and the suitability of the current design modification factors to include such effects are not known. This paper presents a numerical study based on finite element analyses of the elastic lateral buckling strength of cantilever LSBs subject to transverse loading, and the results. The applicability of the design modification factors from various steel design codes was reviewed, and suitable recommendations are presented for cantilever LSBs subject to transverse loading.

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Section: Non-uniform Moment Distribution Effect Of Transverse Loadingmentioning

confidence: 61%

Section: Finite Element Model Of Cantilever Lsbsmentioning

confidence: 99%

Section: Validation Of the Finite Element Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Elastic lateral buckling of cantilever Litesteel Beams under transverse loading

Kurniawan

Mahendran

2011

Int J Steel Struct

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“…Kurniawan and Mahendran [17] also used a similar finite element model to investigate the effect of transverse loads on the elastic buckling capacity of LSBs.…”

Section: Description Of Finite Element Model and Parametric Studymentioning

confidence: 99%

Improved design rules for hollow flange sections subject to lateral distortional buckling

Anapayan

Mahendran

2012

Thin-Walled Structures

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Abstract:The LiteSteel Beam (LSB) is a new hollow flange section with a unique geometry consisting of torsionally rigid rectangular hollow flanges and a relatively slender web. It is subjected to lateral distortional buckling when used as flexural members, which reduces its member moment capacity. An investigation into the flexural behaviour of LSBs using experiments and numerical analyses led to the development of new design rules for LSBs subject to lateral distortional buckling. However, the comparison of moment capacity results with the new design rules showed that they were conservative for some LSB sections while slightly unconservative for others due to the effects of section geometry. It is also unknown whether these design rules are applicable to other hollow flange sections such as hollow flange beams (HFB). This paper presents the details of a study into the lateral distortional buckling behaviour of hollow flange sections such as LSBs, HFBs and their variations. A geometrical parameter defined as the ratio of flange torsional rigidity to the major axis flexural rigidity of the web (GJ f /EI xweb ) was found to be a critical parameter in evaluating the lateral distortional buckling behaviour and moment capacities of hollow flange sections. New design rules were therefore developed by using a member slenderness parameter modified by K, where K is a function of GJ f /EI xweb . The new design rules based on the modified slenderness parameter were found to be accurate in calculating the moment capacities of not only LSBs and HFBs, but also other types of hollow flange sections.

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