ABSTRACT
The interactions among the infrastructure systems have been labeled as "interdependencies." The simplest characterization is that interdependencies represent relationships among the various systems of the infrastructure. For engineering models, the numerical simulation of the performance of the various subsystems provides a framework for assessing and evaluating the inherent correlations. This chapter considers the resiliency models as a means to characterize the interdependent relationships and discusses the infrastructure resiliency models. Infrastructure is comprised of “human,” “green,” and “gray” systems. All aspects of the civil infrastructure systems must be examined to provide a complete picture of community resilience. Community resiliency models may be derived using network theory, geo-spatial statistical systems theory, time series analysis, input–output models, or combinations of the approaches. The interdependent behavior of infrastructure during and after extreme events has received the most attention by the research community.
