Experiments on the Buckling Behavior of Ring-Stiffened Pipelines under Hydrostatic Pressure
Publication: Journal of Engineering Mechanics
Volume 136, Issue 4
Abstract
Submarine pipelines are deemed as thin-walled structures in which relative external pressure may be created in some cases of fluid transmission. The certain effect of this type of loading is local buckling and its propagation along the considerable length of the line. In this study, an experimental program has been performed, in which the influence of ring stiffeners on the buckling strength of pipelines is investigated. In the tests, only hydrostatic pressure is considered as the major loading case, and the effect of further loads is neglected. The modes of initial buckling, buckling propagation, postbuckling, and development of yield lines and the final collapse of the pipeline have been closely appraised. It is verified that the buckling threshold highly hikes up by attaching some light ring stiffeners. By decreasing the ring spacing, the difference between buckling and failure loads is diminished and torsion-type yield lines at failure mode occur on the pipe skin.
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Acknowledgments
The work depicted herein was carried out in collaboration with the Structural Research Center at Urmia University. We would like to put across gratitude in particular to M.Sc. Engineer Mr. Behnam Golzan for his enthusiasm and professionalism in conducting the probes and revising the contents of the paper. The writers are extremely appreciative to him for his great favors in providing commentaries and presenting his constitutive remarks regarding this research.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 136 • Issue 4 • April 2010
Pages: 464 - 471
Copyright
© 2010 ASCE.
History
Received: Aug 22, 2008
Accepted: Aug 17, 2009
Published online: Aug 22, 2009
Published in print: Apr 2010
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