Theoretical assessment of progressive collapse capacity of reinforced concrete structures

The progressive collapse behaviour of reinforced concrete (RC) structures requires consideration of material and\udgeometric non-linearity, concrete crushing and rebar fracture. Compressive arch action (CAA) and catenary action\ud(CTA) are the main resisting mechanisms against progressive collapse following a column loss. Hence, many studies\udhave concentrated on the development of CAA and CTA in RC beams, but without considering the effect of bar\udfracture and the reduction in beam effective depth due to concrete crushing. Taking these additional factors into\udaccount, an analytical model to predict the structural behaviour of RC beams under a column removal scenario was\uddeveloped. The proposed model was evaluated and validated with the available experimental results. The evaluation\udand validation indicate that the proposed model can provide a reliable assessment of RC beam capacity against\udprogressive collapse