DEFINITION OF RECOVERY TIMES AND EXPECTED LOSS OF FUNCTIONALITY FOR THE EVALUATION OF SEISMIC RESILIENCE IN PUBLIC SCHOOLS IN MEXICO
DOI:
https://doi.org/10.18867/ris.112.636Keywords:
Seismic resilience, Structural Design, Vulnerability, Functionality, Recovery timesAbstract
Recent concerns regarding prolonged downtimes and functionality losses observed after seismic events have made it clear that seismic design is heading towards a resilience-based approach. However, currently there is still no clear consensus on how to quantify resilience, or the parameters that defining it (functionality and downtimes) nor there is an established criterion to interpret a given resilience value. In this document a probabilistic approach to estimate recovery times and functionality loss in buildings is presented, which allows to estimate seismic resilience, at the same time delay times and nonstructural elements are taken into consideration. To do so, simple models to associate structural response and the resilience parameters (recovery time and functionality) are defined. A database for public school buildings in Puebla City, created by an internal work group, was then used to obtain the expected times and expected functionality, allowing for resilience quantification. Additionally, a classification of resilience, recovery times and functionality is presented, based on target values obtained with a cost/benefit analysis, this helped the identification of weak elements in the educative Mexican infrastructure. The results showed that the inclusion of delay times and non-structural elements in the resilience quantification is mandatory to not incur in an overestimation of resilience, at the same time, according to the categorization proposed, it was found that a significant portion of school buildings in Puebla City are underprepared in a resilience context.
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