This article provides a comprehensive evaluation of ductile iron (DI) pipeline response to earthquake-induced ground deformation through the results of a large-scale testing program and a fault rupture test on a 150-mm DI pipeline with restrained axial slip joints. The test is used to validate a two-dimensional finite element (FE) model that accounts for soil–pipeline interaction with axial slip, pullout resistance, and rotation of pipe joints. The maximum strike-slip fault offset sustained by push-on, restrained, and restrained axial slip joints is presented as a function of the pipeline/fault crossing angle. DI pipeline performance is controlled by one of the following limit states; tensile, compressive, rotational joint capacity, or local buckling in the pipe barrel. A systematic FE assessment shows that pipelines with restrained axial slip joints accommodate 2–9 and 2–10 times as much fault offset as pipelines with push-on and restrained joints, respectively, for most intersection angles. The results of this work can be used for simplified design and to quantify the relative earthquake performance of different DI pipelines.

中文翻译：

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球墨铸铁管道对地震引起的地面破裂的响应

本文通过大型测试计划和 150 毫米带约束轴向滑动接头的 DI 管道的断层破裂测试的结果，对球墨铸铁 (DI) 管道对地震引起的地面变形的响应进行了综合评估。该测试用于验证二维有限元 (FE) 模型，该模型考虑了土壤-管道与轴向滑动、拉拔阻力和管接头旋转的相互作用。推入式、约束式和约束式轴向滑动节理所承受的最大走滑断层偏移量表示为管道/断层交叉角的函数。DI 管道性能由以下极限状态之一控制；管筒中的拉伸、压缩、旋转接头容量或局部屈曲。系统的有限元评估表明，对于大多数交叉角度，具有约束轴向滑动接头的管道分别容纳 2-9 倍和 2-10 倍的断层偏移量，分别是带有推入式和约束接头的管道。这项工作的结果可用于简化设计和量化不同 DI 管道的相对抗震性能。