Improving Estimates of Earthquake-Induced Downtime in Individual Buildings Using the REDi Methodology

摘要

Earthquake-induced loss of functionality and downtime in individual buildings can cause major economic and societal impacts, ranging from displacement of individual families and businesses to disruption of emergency medical services and government functions. The ability to predict recovery times for buildings after an earthquake is a critical component in understanding and mitigating the seismic risks facing a community. The seismic performance assessment methodology proposed by FEMA P-58 created a framework that translated structural performance into metrics that would enable stakeholders to make risk-informed decisions. Upon that framework, the REDi downtime assessment methodology was created to convert repair times from a FEMA P-58 assessment into building downtime through realistic labor allocation, consideration of delays to initiation of repairs, and calculation of intermediate goals along the path to full recovery. Since its initial development in 2013, the REDi downtime assessment methodology has been implemented in several projects. From these project and research applications, further improvements have been made to the previously published methodology. These improvements, key takeaways, and remaining challenges are discussed.