Please use this identifier to cite or link to this item: https://doi.org/10.1139/cgj-2019-0408
Title: Pipe–soil interaction on free-span shoulder subject to vortex-induced vibration
Authors: Zhang, Z 
Leung, CF 
Chow, YK 
Issue Date: 1-Jan-2020
Publisher: Canadian Science Publishing
Citation: Zhang, Z, Leung, CF, Chow, YK (2020-01-01). Pipe–soil interaction on free-span shoulder subject to vortex-induced vibration. Canadian Geotechnical Journal 57 (11) : 1704-1718. ScholarBank@NUS Repository. https://doi.org/10.1139/cgj-2019-0408
Abstract: Free span refers to a subsea pipeline section that is suspended over the seabed. Such a pipe section is vulnerable to vortex-induced vibration leading to possible fatigue pipe damage. Existing studies on pipe–soil interaction on a free-span shoulder are limited and the methods provided in the commonly used design guidelines appear to rely on either plausible assumptions or simplified conditions that warrant further investigations. In this study, a centrifuge model study has been carried out to evaluate pipe–soil interaction of an embedded pipe subject to cyclic motions. Parametric studies involving effects of pipeline motion amplitude and initial embedment on pipe–soil interaction are conducted. The test results reveal that the degradation in soil stiffness can be correlated with pipeline motion cycle and amplitude. Simplified methods are then proposed for the preliminary evaluation of equivalent soil stiffness.
Source Title: Canadian Geotechnical Journal
URI: https://scholarbank.nus.edu.sg/handle/10635/210480
ISSN: 00083674
12086010
DOI: 10.1139/cgj-2019-0408
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