DAMAGE PROPAGATION CAUSED BY INTERDEPENDENCY AMONG CRITICAL INFRASTRUCTURES
When critical infrastructures are damaged by the large-scale disaster such as a powerful earthquake, the damage interacts among infrastructures and increases especially in urban areas. The damage spreads society and economic function, possibly lead to enormous social loss. For mitigating such damage, it is necessary to understand the structure of interdependency, then planning suitable damage propagation prevention and restoration strategies. However, there has been insufficient research for interdependency among todays urban infrastructures. In this study, the effect of interdependency among critical infrastructures during earthquake disaster is analyzed qualitatively and quantitatively. First, interdependency among critical infrastructures such as electric power,waterworks, gas, transportation, telecommunication, finance, medical services, administrative services, etc. is investigated from past disasters, sorted out as matrices and analyzed by influence diagrams. Next, a propagation model is developed using interdependency structure matrices. Then, the influence of the interdependency is surveyed quantitatively through a case study of an anticipated earthquake disaster in the Tokyo metropolitan area. The results show that almost all the infrastructures are interdependent, and electric power,telecommunications, and highway systems have a greater influence on other infrastructures.
interdependency infrastructure damage propagation mitigation earthquake influence diagram
Mai TSURUTA Yozo GOTO Yasuhiro SHOJI Shojiro KATAOKA
Section Chief ,Regional and Metropolitan Planning Division,National and Regional Planning Bureau,Mi Senior Researcher,Institute of Environment and Disaster Research,Fuji Tokoha University,Shizuoka,Ja Head,Earthquake Disaster Prevention Division,National Institute for Land and Infrastructure Managem Senior Researcher,Earthquake Disaster Prevention Division,National Institute for Land and Infrastru
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）