Resilience assessment of community building portfolios

Abstract

The resilience of a community is determined by its ability to withstand and recover from disruptions due to natural or manmade hazards. While a consensus has developed in disaster-related research in recent years that community’s infrastructure should be designed and regulated to achieve community-specific resilience goals, there is currently no integrated source of quantitative tools and measurement technologies to support risk mitigation decisions of different community stakeholders in a coordinated and risk-informed manner. This work contributes to the state of the art of resilience assessment of community building portfolios in several aspects. First, a new building portfolio functionality metric (BPFM) is proposed, which is a measureable, scalable, and actionable indicator as it enables a building portfolio’s resilience to be assessed on a consistent measure at various spatial scales and throughout the time domain of interest. Second, a building portfolio functionality loss estimation (BPLE) framework is developed, which provides a probabilistic and spatial loss assessment, measured by the BPFM, across an entire community immediately following a hazard event. Third, a novel stochastic post-disaster building portfolio recovery model (BPRM) is formulated, which characterizes the spatial and temporal evolution of a building portfolio’s recovery following a hazard event, resulting in the building portfolio recovery trajectory and recovery time, as well as the spatial variation of the recovery outcome within the community.