Seismic Risk Assessment of Urban Lifelines under System Interactions

研究结果总结如下：(1)研究了地震作用下生命线系统相互作用的实例。对其进行了分类，提出了城市生命线系统整体防护的主要问题。(2)提出了功能损伤扩展条件下复合生命线系统地震危险性分析方法。通过算例验证了该方法的有效性。(3)提出了一种大规模生命线网络地震危险性评估算法。将需求曲线(心理指标)和恢复曲线(工程指标)相结合，建立了生命线系统震后性能评价方案。(5)研究了居住空间地震安全性的基本问题，重点研究了生命线损伤及其与非结构构件失效和家具倾覆的关系。(6)研究了住宅建筑生命线损伤和地震可靠性的实例。运用交通流网络理论和模型选择理论分析了洛马普里塔地震对湾区交通系统的影响。重点研究了公路网和BART之间的相互作用。(8)作为生命线系统地震微区划的一种有效方法，发展了一种频率相关的线性化技术。

The results study are summarized as folloes.(1) Case histories of lifeline system interaction under carthquakes have been studies. Their categorization was performed, from which major issues for protection of entire urban lifeline systems were proposed.(2) Analytical procedure was developed for seismic risk assessment of compound lifeline systems under functional damage propagation. Its usefulness was demonstrated through a case study.(3) An algorithm was developed for seismic risk assessment of large-scale lifeline networks. A fuzzy logic methodology was added to the existing probabilistic model in order to incorporate non-numerical information.(4) An evaluation scheme was developed for the post-earthquake performance of lifeline systems by combining demand curves (psychological measure) and restoration curves (engineering measure).(5) basic aspects were investigated as to the seismic safety of habitat space with emphasis on the lifeline damage and its relation to the failure of non-structural elements and over-turn of furnitures.(6) Case history was investigated as to the lifeline damage and seismic reliability of residential buildings. The case of the Loma Prieta Earthquake was studied extensively.(7) The effects of the Loma Prieta Earthquake on the Bay Area transportation systems was analyzed by using a traffic-flow network theory and model choice theory. Emphasis was placed on the interaction between the highway network and BART.(8) As a useful method of seismic microzonation for lifeline systems, a frequency dependent linearization technique was developed.