A framework to quantify the impact of deterioration on the seismic resilience of structures

The seismic resilience (SR) of civil structures has become an important concept for structural engineering in the last two decades. Ageing and deterioration effects must be considered during SR assessments. This paper proposes a framework that implements deterioration inside the assessment of SR for structures by developing hazard-specific fragility models to estimate the loss. Deterioration affects the rapidity of the recovery process, and several levels of deterioration were considered by performing a probability-based assessment. The results in terms of maximum longitudinal drift ratio were developed with analytical fragility curves. These outcomes were applied to calculate the SR of the structures demonstrating that the impact of deterioration may significantly reduce the seismic resilience. The SR was calculated for a benchmark low-rise building performed with advanced numerical simulations with OpenSees. Deterioration was implemented on the losses of the building and on the recovery process by implementing two rates of recovery.