Disaster Risk Management of Interdependent Infrastructure Systems for Community Resilience Planning
We have developed models, metrics and decision frameworks for disaster risk management of interdependentinfrastructure systems to support community resilience planning. The overall research can be broadly divided into three parts: (1) developing a model to simulate the post-disaster performance of interdependent infrastructure systems; (2) developing a decision framework to support the pre-disaster risk mitigation of interdependent infrastructure systems, and (3) developing a decision framework to support the post-disaster recovery planning of the interdependent infrastructure systems towards higher resilience. First of all, the Dynamic Integrated Network (DIN) model is developed to simulate the performance of interdependent infrastructure systems over time following disruptive events. It can consider the physical, cyber and geospatial interdependencies at three different levels: system-to-system level, system-to-facility level and facility-to-facility level. The uncertainties in some of the modeling parameters are captured by probabilistic models. The DIN model can be applied to any infrastructure systems under any hazard/multi-hazards. Secondly, the Interdependent Infrastructure Risk Mitigation (IIRM) decision problem and the corresponding risk-informed decision framework are introduced to support the pre-disaster risk mitigation planning of several interdependent infrastructure systems. The outcome of the IIRM problem is useful for the decision makers to allocate limited risk mitigation budget or resources to the most critical infrastructure facilities in different systems to achieve greater community disaster resilience. Thirdly, the Interdependent Infrastructure Recovery Planning (IIRP) problem and the corresponding game theory-based IIRP decision framework are introduced. Solving the IIRP problem can help the decision makers optimizing the assignment and scheduling of the repair teams for an infrastructure system with considering the repair plan of the other infrastructure systems during the post-disaster recovery phase.