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首页> 外文期刊>Tunnelling and underground space technology >A critical review on the vulnerability assessment of natural gas pipelines subjected to seismic wave propagation. Part 1: Fragility relations and implemented seismic intensity measures
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A critical review on the vulnerability assessment of natural gas pipelines subjected to seismic wave propagation. Part 1: Fragility relations and implemented seismic intensity measures

机译：对遭受地震波传播的天然气管道脆弱性评估的严格审查。第1部分：脆弱性关系和已实施的地震烈度测度

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摘要

Natural gas (NG) pipeline networks constitute a critical means of energy transportation, playing a vital role in the economic development of modern societies. The associated socio-economic and environmental impact, in case of seismically-induced severe damage, highlights the importance of a rational assessment of the structural integrity of this infrastructure against seismic hazards. Up to date, this assessment is mainly performed by implementing empirical fragility relations, which associate the repair rate, i.e. the number of repairs/damages per unit length of the pipeline, with a seismic intensity measure. A limited number of analytical fragility curves that compute probabilities of failure for various levels of predefined damage states have also been proposed, recently. In the first part of this paper, a thorough critical review of available fragility relations for the vulnerability assessment of buried NG pipelines is presented. The paper focuses on the assessment against seismically-induced transient ground deformations, which, under certain circumstances, may induce non-negligible deformations and strains on buried NG pipelines, especially in cases of pipelines crossing heterogeneous soil sites. Particular emphasis is placed on the efficiency of implemented seismic intensity measures to be evaluated or measured in the field and, more importantly, to correlate with observed structural damage on buried NG pipelines. In the second part of this paper, alternative methods for the analytical evaluation of the fragility of steel NG pipelines under seismically-induced transient ground deformations are presented. Through the discussion, recent advancements in the field are highlighted, whilst acknowledged gaps are identified, providing recommendations for future research.
机译：天然气（NG）管道网络是能源运输的重要手段，在现代社会的经济发展中发挥着至关重要的作用。在地震引起的严重破坏的情况下，相关的社会经济和环境影响突显了合理评估该基础设施抗地震危害的结构完整性的重要性。迄今为止，该评估主要是通过实现经验脆弱性关系来进行的，该关系将修复率（即每单位管道长度的修复/损坏次数）与地震烈度度量联系起来。最近，已经提出了有限数量的分析易碎性曲线，该易碎性易碎性曲线计算了针对各种级别的预定损坏状态的失效概率。在本文的第一部分中，对埋藏式天然气管道的脆弱性评估中​​可用的脆弱性关系进行了全面的批判性评论。本文主要针对地震引起的瞬时地面变形进行评估，在某些情况下，地下天然气管道可能会引起不可忽略的变形和应变，特别是在管道穿越异质土壤现场的情况下。特别强调的是要在现场进行评估或测量的已实施地震烈度测量的效率，更重要的是，它与地下天然气管道上观察到的结构破坏相关。在本文的第二部分中，提出了在地震引起的瞬态地面变形下分析天然气NG管道脆性的替代方法。通过讨论，重点介绍了该领域的最新进展，同时发现了公认的差距，为未来的研究提供了建议。

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