Deformation Behavior And Limit State of High-grade Induction Bend Pipes Subjected to Large Ground Deformation
Deformation Behavior And Limit State of High-grade Induction Bend Pipes Subjected to Large Ground Deformation
复制标题
高等级感应弯管在地面大变形下的变形行为及极限状态
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
Y. Hashimoto
中科院分区：
文献类型：
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作者：
Masaki Mitsuya;T. Sakanoue;H. Yatabe;Y. Hashimoto
在易发生液化的地震区安装高等级管线，必须保证管线的变形不超过极限。通过对API5LX80感应弯管的弯曲试验，研究了管道的变形行为和泄漏限值。通过高精度的有限元分析，模拟了这些试验的大变形行为。在此基础上，对弯管的泄漏量进行了估算，并通过其他弯管试验验证了该方法的准确性。结合已有的埋地管道变形分析，提出了弯管在地面大变形作用下的评估方法。例如，通过模拟土体液化引起的地面侧向变形情况下埋地管道的变形行为，证明了对于外径614.4 mm、壁厚14.5 mm的管道，管道的变形不会超过本文所给出的极限状态。
For installing high-grade line pipes in a seismic area concerned about soil liquefaction, it is essential to ensure that the deformation of the pipeline does not surpass their limit. In this study, the bending experiments of the API 5L X80 induction bend pipes were performed to clarify the deformation behavior and limit for leakage of the pipes. The large deformation behaviors of these experiments were simulated by a high precision Finite Element (FE) analysis. Based on this analysis, we were able to estimate the leakage of the bend pipes, and the precision of this method was verified by other bending experiments. In combination with the existing deformation analysis for buried pipelines, an evaluation method of bend pipes subjected to a large ground deformation was presented. For instance, by simulating the deformation behavior of the buried pipeline in the case of the lateral ground deformation caused by soil liquefaction, it was demonstrated that the deformation of the pipelines would not surpass their limit state obtained in this study for a pipeline with an outer diameter of 614.4 mm and wall thickness of 14.5 mm.