Pipeline structural analysis is a well-developed topic in engineering and research practice. Since water, oil or gas pipeline systems are a key part of modern development, therefore, it is important to ensure an appropriate behavior under seismic action. In this paper, the seismic response of buried pipelines is numerically simulated using a three-dimensional (3D) parametric model of soil-pipeline interaction. The role of several parameters on both soil and pipeline are incorporated into a 2D-1D space separated representation based on the Proper Generalized Decomposition (PGD) framework, which allows addressing 3D parametric problems while reducing the computational complexity of 1D and 2D characteristic problems. These results can be used for design, safety evaluation and protection of buried pipelines crossing seismic area and can be calculated in real time from the parametric solution of the associated problem within the PGD framework.

管道结构分析是工程和研究实践中一个非常发达的主题。由于水，石油或天然气管道系统是现代发展的关键部分，因此重要的是确保地震作用下的适当行为。在本文中，使用土-管相互作用的三维（3D）参数模型对埋入式管道的地震响应进行了数值模拟。在适当的广义分解（PGD）框架的基础上，将几个参数在土壤和管道上的作用合并到2D-1D空间分隔表示中，该模型可以解决3D参数问题，同时降低1D和2D特征问题的计算复杂性。这些结果可用于设计，