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长输埋地管道是运输石油类能源最为重要的一种方式。对于埋地管线来说,由地震断层引起的走滑断层位移是影响管道完整性及安全运行的主要威胁之一。本文利用ABAQUS有限元软件通过模拟跨断层埋地管道在走滑断层位移下的变形屈曲响应,考虑了钢材和土体的非线性因素,并探讨了断层错动量、径厚比、内压、不同钢级材料等参数的影响。结果表明:走滑断层作用下管道的危险区域位于距断层面4m~6m左右处,而非断面与管道交汇处,并且管道内压在一定程度上缓解了管道局部屈曲现象,为跨断层埋地输气管道的设计和维护运营提供一些参考。
Long-term buried pipeline is the most important way to transport oil-based energy. For buried pipelines, the strike-slip fault displacement caused by seismic fault is one of the major threats to pipeline integrity and safe operation. In this paper, ABAQUS finite element software is used to simulate the deformation buckling response of the cross-section buried pipeline under the strike-slip fault displacement. The nonlinear factors of steel and soil are taken into account and the fault movement, diameter-thickness ratio, internal pressure and different Steel grade materials and other parameters. The results show that the dangerous zone of the pipeline under the strike-slip fault is located at a distance of 4m ~ 6m away from the fault plane and not at the intersection of the pipeline and the section, and the pipeline internal pressure relieves the local buckling of the pipeline to a certain extent, Gas pipeline design and maintenance operations to provide some reference.