Development of Optimal Design Method for Steel Double-Beam Floor System Considering Rotational Constraints

Under high gravity loads, steel double-beam floor systems need to be reinforced by beam-end concrete panels reduce the material quantity since rotational constraints from panel can decrease moment demand inducing a negative at ends of beams. However, optimal design process for beams requires time-consuming iterative analysis entire system while especially keeping in consideration composite connections between and This study aimed develop an method with LM (Length-Moment) index minimize without process. The is indicator that select minimum cross-section flexural strength lateral-torsional buckling. To verify proposed method, quantities code-based methods were compared various loads. successfully optimized simply choosing objective function satisfying safety-related constraint conditions. In particular, under was superb providing quantity-optimized option. Thus, alternative designing system.