Abstract Dependency of urban life and modern industries on civil infrastructure and lifelines urges the stake-holders and authorities to consider the resilience of lifeline systems as a crucial decision-making factor. In this paper, the performance of a complex urban gas distribution network, under the effects of wave propagation, in a city with more than 12 million residents is assessed. In the first phase, the inputs for soil-pipe interaction analysis in the Greater Tehran Area (GTA) are identified and quantified. Finite element models of the GTA pipelines are developed and the performance of the network is investigated. The second phase of the study consists of an experimental program, aimed at further studying the performance of buried pipelines in wave propagation and verification of the numerical models. Previous studies are consulted to define limit states and develop fragility curves for the steel buried pipeline network in the Greater Tehran Area. A damage distribution map is produced for the GTA buried gas distribution steel pipelines by synchronization of different performance assessment inputs, identified in the study, over the GTA area. The study also provides fragility distribution maps for steel buried pipelines in the GTA for use as a decision-making tool. Countermeasures are proposed for mitigation of wave propagation-induced damage and risks on the gas distribution network. The framework used in the presented study can be adopted for performance assessment and risk mitigations for similar urban infrastructure and lifelines.

中文翻译：

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地震波传播下城市生命线的数值、实验和脆弱性分析：大德黑兰地区输气管道研究

摘要 城市生活和现代工业对民用基础设施和生命线的依赖促使利益相关者和当局将生命线系统的弹性视为关键的决策因素。在本文中，评估了在波传播的影响下，在一个拥有超过 1200 万居民的城市中的复杂城市燃气分配网络的性能。在第一阶段，确定和量化大德黑兰地区 (GTA) 土壤-管道相互作用分析的输入。开发了 GTA 管道的有限元模型并研究了网络的性能。研究的第二阶段包括一个实验计划，旨在进一步研究埋地管道在波传播中的性能和数值模型的验证。参考以前的研究来定义大德黑兰地区钢埋管网的极限状态并制定脆性曲线。通过同步研究中确定的 GTA 地区不同性能评估输入，为 GTA 埋地气体分配钢管道生成损坏分布图。该研究还提供了大多伦多地区钢埋管道的脆性分布图，用作决策工具。提出了减轻波传播引起的对天然气分配网络的损害和风险的对策。本研究中使用的框架可用于类似城市基础设施和生命线的绩效评估和风险缓解。通过同步研究中确定的 GTA 地区不同性能评估输入，为 GTA 埋地气体分配钢管道生成损坏分布图。该研究还提供了大多伦多地区钢埋管道的脆性分布图，用作决策工具。提出了减轻波传播引起的对天然气分配网络的损害和风险的对策。本研究中使用的框架可用于类似城市基础设施和生命线的绩效评估和风险缓解。通过同步研究中确定的 GTA 地区不同性能评估输入，为 GTA 埋地气体分配钢管道生成损坏分布图。该研究还提供了大多伦多地区钢埋管道的脆性分布图，用作决策工具。提出了减轻波传播引起的对天然气分配网络的损害和风险的对策。本研究中使用的框架可用于类似城市基础设施和生命线的绩效评估和风险缓解。该研究还提供了大多伦多地区钢埋管道的脆性分布图，用作决策工具。提出了减轻波传播引起的对天然气分配网络的损害和风险的对策。本研究中使用的框架可用于类似城市基础设施和生命线的绩效评估和风险缓解。该研究还提供了大多伦多地区钢埋管道的脆性分布图，用作决策工具。提出了减轻波传播引起的对天然气分配网络的损害和风险的对策。本研究中使用的框架可用于类似城市基础设施和生命线的绩效评估和风险缓解。