An expeditious framework for assessing the seismic resilience (SR) of structural configurations

The assessment of the Seismic Resilience (SR) has become a fundamental issue in Structural Engineering to ensure rapid and efficient recovery to earthquake scenarios. Even if there are methodologies that assess SR, most of them are significantly time-consuming. In this paper, a framework for simplified assessments of SR is proposed based on the existing literature. The probability-based method of fragility curves is applied to estimate the losses and a novel definition of the recovery model is herein proposed. A case study is discussed to apply the proposed framework to two configurations: a fixed-base and a base-isolated structural system. The state-of-the-art platform Opensees has been applied to calculate the non-linear performance of the structures. The longitudinal drift ratio was chosen as the representative parameter to develop fragility curves and thus to quantify SR. The response of the 200 analyses (100 for each system) shows the benefit of applying base isolation technique in terms of SR, used as a comprehensive parameter to compare the two solutions. The proposed approach may be helpful for many stakeholders and decision makers for pre- and post-earthquake assessments.