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, the authors 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.
Deformation behavior and limit state of high-grade induction bend pipes subjected to large ground deformation
Verformungsverhalten und Endzustand von hochwertigen induktionsgebogenen Rohrleitungen bei großen Erdbewegungen
2008
8 Seiten, 17 Bilder, 4 Tabellen, 8 Quellen
Conference paper
Storage medium
English
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