OPTIMUM RESTORATION MODEL CONSIDERING INTERACTIONS AMONG LIFELINE SYSTEMS-INTERACTIONS AMONG RESTORATION ACTIVITIES OF LIFELINE UTILITIES

摘要

With urbanization, interdependency of urban functions has been getting larger and larger. Once a disaster occurs in urban areas, its influence causes not only structural damage, but also functional damage to various lifeline systems and affects the lives of the people in damaged areas. It is, therefore, important for many related fields/organizations to collaborate with each other for developing an integrated earthquake disaster reduction system. The objective of this research is to propose an optimum recovery model considering interactions among related organizations. At the first step, we have collected the data on actual recovery activities of each lifeline utility after the 1995 Kobe earthquake and analyzed them from the viewpoint of both time and space domains. Based on the real data, we found that there were several problems raised during lifeline restoration activities. From the results of this study, we can say that there are severe problems/obstacles that can not be solved appropriately by individual lifeline utility with independent measures and integrated approach is very important for decreasing the total negative impact due to a disaster.