Simplified analytical method for lateral torsional buckling assessment of RHS beams with web openings

Structures ◽  
2021 ◽  
Vol 34 ◽  
pp. 2848-2860
Author(s):  
Abdelkader Saoula ◽  
Mahmoud M. Selim ◽  
Sid Ahmed Meftah ◽  
Abdelrahmane Bekaddour Benyamina ◽  
Abdelouahed Tounsi
Keyword(s):  
Analytical Method ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Web Openings

Analytical Solutions of Lateral–Torsional Buckling of Castellated Beams

2016 ◽  
Vol 16 (08) ◽  
pp. 1550044 ◽  
Author(s):  
Boksun Kim ◽  
Long-Yuan Li ◽  
Ashley Edmonds
Keyword(s):  
Analytical Solutions ◽  
Bottom Flange ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Element Analysis ◽  
Web Openings ◽  
Total Potential ◽  
Numerical Studies ◽  
Shear Buckling ◽  
Critical Moments

The majority of the existing literature on the lateral stability of castellated beams deals with experimental and/or numerical studies. This paper presents a comprehensive analytical study of the lateral–torsional buckling of simply supported castellated beams subject to pure bending and/or a uniformly distributed load. Using the principle of total potential energy, analytical expressions for the critical buckling moments and loads are derived and applied for various beam lengths. The three different locations of the applied load are used: At the top flange, shear center and bottom flange. The results show that the influence of web openings on the critical buckling moments and loads are mainly due to the reduction of the torsional constant caused by the web openings. Web shear effects and web shear buckling become important only when the beam is short and the flange is wide. The critical moments and loads will be overestimated or underestimated if the full or reduced section properties are used. The accurate critical moment or load should be calculated based on the average torsional constant of the full and reduced sections rather than simply taking the average of the critical moments or loads calculated from the full and reduced section properties. The present analytical solutions are verified using 3D finite element analysis results.

Design rules for lateral torsional buckling of channel sections subject to web loading

Stahlbau ◽  
2008 ◽  
Vol 77 (4) ◽  
pp. 247-256 ◽  
Author(s):  
H.H. (Bert) Snijder ◽  
J.C.D. (Hans) Hoenderkamp ◽  
M.C.M. (Monique) Bakker ◽  
H.M.G.M. (Henri) Steenbergen ◽  
C.H.M. (Karin) de Louw
Keyword(s):  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Design Rules
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