Abstract Pipeline walking induced by heat-up and cool-down cyclic loadings during shutdown and restart cycles is a challenge in the design of relatively short pipelines exposed on seabeds. A major source of uncertainty in the analysis of pipeline walking is the pipe-soil response, which has a significant influence on pipeline walking. To investigate the pipe-soil response during pipeline walking, a set of large-scale model tests are conducted on Bohai sand, and they involve axially moving pipelines with different speeds and cycles. Based on these test results, bi-linear pipe-soil interaction models with normalization of the pipe weight and diameter are proposed for Bohai Bay sand. Subsequently, a comparison of the model test data to existing pipe-soil interaction models is performed, and the existing pipe-soil interaction models are calibrated with site-specific soil properties of Bohai Bay sand. Finally, the application of the site-specific pipe-soil interaction models for a pipeline-walking analysis of pipeline placed on Bohai Bay sand is performed with the finite element method to study how pipeline walking is influenced by these pipe-soil interaction models. Combined with the influence mechanisms, a design model is proposed that considers the potential risks of pipeline walking in pipeline design to reduce costs without compromising reliability.

中文翻译：

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渤海沙上管道走行分析中的轴向管土相互作用

摘要 在关闭和重启循环期间由加热和冷却循环载荷引起的管道行走是设计暴露在海床上的相对较短管道的挑战。管道行走分析中不确定性的一个主要来源是管土响应，它对管道行走有显着影响。为了研究管道行走过程中的管土响应，在渤海砂上进行了一组大型模型试验，它们涉及不同速度和周期的轴向移动管道。基于这些测试结果，提出了对渤海湾砂进行管道重量和直径标准化的双线性管土相互作用模型。随后，将模型测试数据与现有的管土相互作用模型进行比较，现有的管土相互作用模型是用渤海湾沙子的特定场地土壤特性校准的。最后，利用有限元方法，将特定场地的管土相互作用模型应用于渤海湾沙上管道的管道行走分析，研究这些管土相互作用模型如何影响管道行走。结合影响机制，提出了一种在管道设计中考虑管道行走潜在风险的设计模型，以在不影响可靠性的情况下降低成本。应用现场特定的管土相互作用模型对渤海湾沙上的管道进行管道行走分析，通过有限元方法研究管道行走如何受这些管土相互作用模型的影响。结合影响机制，提出了一种在管道设计中考虑管道行走潜在风险的设计模型，以在不影响可靠性的情况下降低成本。应用现场特定的管土相互作用模型对渤海湾沙上的管道进行管道行走分析，通过有限元方法研究管道行走如何受这些管土相互作用模型的影响。结合影响机制，提出了一种在管道设计中考虑管道行走潜在风险的设计模型，以在不影响可靠性的情况下降低成本。