S-FRAME Webinar: Lateral Torsional Buckling Design by Advanced Analysis in S-STEEL
Lateral torsional buckling (LTB) is a key failure mode that typically governs the capacity of long-span laterally unsupported beams. Given that LTB provisions in design standards have several limitations, a family of advanced beam buckling elements was developed at the University of Ottawa to determine the elastic critical moments for beams under general loading and boundary conditions. The solutions capture span interaction, load height effects, bracing types, bracing height effects, etc., while keeping the modeling effort to a minimum. Some of these advanced elements were recently implemented into an advanced LTB design module in S-Steel and integrated with LTB design provisions to characterize the factored resistance of beams.