Numerical and Experimental Evaluation of the Lateral-Torsional Buckling Response of Welded Girders

Dr. Driver, Dr. Imanpour

Sheldon Twizell

M.Sc.

Sheldon graduated from the University of Alberta with a B.Sc. in Civil Engineering and began his M.Sc. program in September of 2018. His research aims to validate the performance of the current Canadian steel design standards for lateral-torsional buckling. The current design methodology was empirically developed through an analysis of Dibley’s (1969) experimental tests on rolled I-sections. Since 1969, minimal testing has been conducted due to the complexity of lateral-torsional buckling. Recently, numerical analyses investigating the stability behaviour of steel girders have suggested that the current design standards may be underperforming in some cases. It is theorized that the existing methodologies do not accurately reflect the influence of modern welding and fabrication procedures. Subsequently, the performance of our design standards is unclear. For this reason, a large scale experimental test program was developed to expand the database of lateral-torsional buckling results and, ultimately, asses the performance of our current design methodologies. The research conducted by Sheldon is a continuation of the on-going testing program and was expanded to include a rigorous numerical analysis and experimental testing of heat straightened girders.

Donadeo Innovation Centre for Engineering

University of Alberta

Edmonton, AB, Canada

info@steelcentre.ca