Behavior of marine pipelines under seismic faults |
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Authors: | NY Kershenbaum SA Mebarkia HS Choi |
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Institution: | aMcDermott Engineering Houston, Houston, TX, USA;bDeptartment of Naval Architecture, Pusan National University, Pusan, South Korea |
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Abstract: | A new study investigates an unburied offshore “snaked” pipeline behavior under various types of seismic faults. The snaking of the pipeline is caused by the thermal/pressure expansion and soil friction. The snaking takes place at a certain distance from the pipeline's unrestrained end and gradually increases towards the restraint. It is shown that longitudinal seismic faults have less effect on a straight pipeline than a snaked pipeline. The new seismic analysis demonstrates that an increase of ground displacement causes a very small change in bending and longitudinal stresses. The new approach results in a safe, subsea pipeline construction and operation with a significant cost reduction. |
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Keywords: | Marine pipeline Seismic fault Snaking Pipeline expansion |
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