Arup, a global sustainable development consultancy, and the NHERI SimCenter, an NSF-funded center dedicated to accelerating innovation and technology transfer in natural hazards engineering, have aligned efforts to advance the field of post-earthquake functional recovery simulation with the release of the Resilience-Based Design Initiative (REDi™) Seismic Downtime Model. The release is made through PyREDi, an open-source Python package that implements the latest version of Arup’s REDi Seismic Downtime Model, which is available at Arup’s GitHub repository. It is also accessible in an updated version of the SimCenter’s Performance-Based Engineering (PBE) Application, marking a significant contribution to the engineering and disaster resilience communities.
The REDi guidelines were developed by Arup to provide owners, architects, and engineers a framework for resilience-based design for earthquakes, extreme storms, and flooding. This launch provides open access to the official REDi Seismic Downtime Model, allowing practitioners to evaluate the resilience of their building designs, and enabling researchers to better understand and simulate the recovery of buildings and communities after earthquakes. The REDi Seismic Downtime Model can be employed for risk assessment due to its inherent probabilistic nature, making it well-suited for integration into various risk frameworks. By making the model publicly available, the developers foster feedback from the community, and they are committed to provide subsequent updates to ensure that the REDi Seismic Downtime Model continues to represent the state of the art in resilient design and downtime recovery modeling.