A fragility-oriented approach for seismic retrofit design

This study proposes a practical fragility-oriented approach for the seismic retrofit design of case-study structures. relies on mapping increase global displacement-based ratio capacity to life-safety demand ( CDR LS ) building-level fragility reduction. Specifically, due retrofitting is correlated with corresponding shift in median values multiple structure-specific damage states, observing that pseudo-linear trend appropriate under certain conditions. Accordingly, proposed fit such (structure-specific) linear and then use it by first specifying desired subsequently finding target value must be achieved through design. The validity illustrated an archetype reinforced concrete (RC) structure not conforming modern requirements, which has been retrofitted using various techniques, namely, fiber-reinforced polymers wrapping columns joints, RC jacketing, steel jacketing.