ABSTRACT
Ageing reinforced concrete (RC) structures were observed to be much more vulnerable to progressive collapse than newly constructed ones. Deterioration due to severe reinforcement corrosion can significantly affect progressive collapse resistances of the RC structures. Hence, this contribution aims at numerically investigating the progressive collapse behavior of the deteriorated RC frame structures subjected to uniform reinforcement corrosion. Both static and dynamic progressive collapse analyses in relation to a deteriorated RC frame subjected to a middle column removal scenario are carried out. It is observed that both static and dynamic progressive collapse resistances significantly decrease with increasing corrosion level. The reinforcement corrosion is found to be the predominant cause to the deterioration of the progressive collapse resistances, while the effect of concrete deterioration has limited influence. Reinforcement corrosion in the beams in the bays directly above the removed column controls the structural progressive collapse performance, while the reinforcement corrosion in other locations has little influence. The dynamic resistances are found to decrease larger in percentage than the static resistances with increasing corrosion level.
