Urban Earthquake Hazards Reduction with an Emphasis on Lifeline System Interactions

1.研究结果表明，地震应急条件下生命线破坏的系统相互作用和社会影响。(1)建立了系统相互作用下生命线地震危险性评价的分析方法。提出了评价系统性能的指标，为该分析方法的应用提供了依据。(2)提出了一种利用神经网络方法对影响埋地管道地震损伤的因素进行评估的方法。(3)以9119号台风的新闻报道为基础，研究了生命线损失与社会影响的相互作用。(4)1989年洛马普列塔地震的损坏数据清楚地表明了生命线损坏对建筑结构的影响。就案例研究开展了以下工作。(1)根据大坂市供水系统构建的系统模型，在供水和供电系统之间的相互作用下进行地震风险评估。(2)以金泽市为例，进行了考虑地震灾害相互作用的区域风险评估。(3)探讨了地下活动空间安全设计中的人员疏散模拟问题.在此基础上，对地震作用下生命线的系统相互作用和地震对策框架进行了综合探讨。

1. Following results have been obtained regarding the system interactions and societal impacts of lifeline damage under earthquake emergency.(1) An analytical method have been developed for seismic risk assessment of lifelines under system interactions. Indices for evaluation of system performance were proposed to be used in application of the analytical method.(2) A method has been developed for evaluation of factors affecting the seismic damage of buried pipelines by means of a neural network approach.(3) Interactions of lifeline damage and its societal impact was investigated on the basis of the reported news on the Typhoon 9119.(4) Implications of lifeline damage with building structures were made clear from the damage data on the 1989 Loma Prieta Earthquake.2. Following works were conducted regarding case studies.(1) Seismic risk assessment was performed under the interactions between water supply and power supply systems on the basis of a system model constructed from the water supply system for Osaka City.(2) A case study was performed on regional risk assessment with earthquake disaster interactions applied to Kanazawa City.(3) Issues of evacuation simulation were discussed for safety design of underground activity spaces.3. Based on the foregoing accomplishments, comprehensive discussion was made on the system interactions of lifelines under earthquakes and on the framework of earthquake countermeasures.