scholarly journals Lateral-torsional Buckling Moment of Simply Supported Unrestrained Monosymmetric Beams

2019 ◽  
Vol 471 ◽  
pp. 032074
Author(s):  
Roman Bijak
Keyword(s):  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Simply Supported

Lateral torsional buckling of welded wide flange beams under constant moment

2018 ◽  
Vol 45 (9) ◽  
pp. 766-779 ◽  
Author(s):  
Imran Kabir ◽  
Anjan K. Bhowmick
Keyword(s):  
Fe Analysis ◽  
Lateral Torsional Buckling ◽  
Design Specification ◽  
Torsional Buckling ◽  
Simply Supported ◽  
Lehigh University ◽  
Current Design ◽  
Flange Beams ◽  
Constant Moment ◽  
Steel Design

The structural steel design specification in Canada, CSA S16-14, uses the same equations for the design of rolled and welded shape beams for lateral torsional buckling (LTB). A recent study has shown that the current design equations might overestimate the capacity of welded wide flange (WWF) beams. This paper evaluates the performance of the current design equations in providing LTB capacities of welded I-shape beams (WWF beams). An extensive finite element (FE) analysis is performed for simply supported WWF beams subjected to constant moment. In total, 256 FE models are analyzed and it is observed that both CSA and AISC overestimate the LTB capacity of welded I-shape beams by as much as 37%, particularly when residual stress measured at Lehigh University is used in the analysis. Also, the Eurocode is found to be conservative and the proposed equation by MacPhedran and Grondin in 2011 provides better predictions of LTB strengths of WWF shapes than the current CSA approach.

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