Urban Earthquake Hazards Reduction with an Emphasis on Lifeline System Interactions

1.对地震应急下生命线损伤的系统相互作用和社会影响进行了研究。(1)提出了系统相互作用下生命线地震危险性评估的分析方法。(2)提出了一种基于神经网络的地下管道地震损伤影响因素评估方法。(3)根据9119号台风的报道，研究了生命线损伤与社会影响的相互作用。(4)从1989年洛马普里塔地震的损伤数据中明确了生命线损伤对建筑结构的影响。具体工作如下：(1)基于大阪市供水系统构建的系统模型，在供水和供电系统相互作用下进行了地震风险评估。(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疏散模拟问题。在上述研究成果的基础上，对地震下生命线系统的相互作用和地震对策框架进行了全面的探讨。

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.