This paper presents an assessment case study on several segments of buried natural gas pipeline constructed in 1936 with 'bell-bell-chill ring' (BBCR) style girth weld joints, and currently operating in a seismically active region of North America. Seismic vulnerability was evaluated in terms of girth weld fracture and plastic collapse probabilities for specified hazards of varying severity and likelihood. Monte Carlo simulations performed in NESSUS provided failure probability estimates from distributed inputs based on PIPLIN deformation analyses, nondestructive and destructive flaw sizing, residual stress measurements, weld metal tensile and CTOD tests, and limit state functions based on published stress intensity and collapse solutions.
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机译：本文介绍了1936年建造的埋藏天然气管道的几个段的评估案例研究，其中“Bell-Bell-Chill Ring Ring”（BBCR）样式围绕焊接接头，目前在北美的地震活动地区经营。在周长焊接骨折和塑料坍塌概率方面评估了地震脆弱性，针对特定严重程度和可能性的特定危害。在Nessus中进行的蒙特卡罗模拟提供了基于Piplin变形分析，非破坏性和破坏性缺陷，残余应力测量，焊接金属拉伸和CTOD测试的分布式输入的故障概率估计，以及基于发布的应力强度和塌陷解决方案的限制状态功能。
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