Seismic fragility assessment of reinforced concrete and post-tensioned slab-column connections - reliability-based formulations for storey drift limits

Many design codes, such as ACI 318−19, ACI 352.1R-11 and ASCE 41−17, offer deterministic inter-storey drift limit functions of the gravity shear ratios for flat slab floor systems acting as the primary lateral load-resisting system. However, such deterministic limits are not capable of capturing the inherent aleatory uncertainty in the damage capacities of slab-column connections, inducing unknown failure risks during seismic events. To address …