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Keywords = HP/HT unburied subsea pipelines

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14 pages, 2568 KiB  
Article
The Role of Soil Structure Interaction in the Fragility Assessment of HP/HT Unburied Subsea Pipelines
by Davide Forcellini, Daniele Mina and Hassan Karampour
J. Mar. Sci. Eng. 2022, 10(1), 110; https://doi.org/10.3390/jmse10010110 - 14 Jan 2022
Cited by 5 | Viewed by 2401
Abstract
Subsea high pressure/high temperature (HP/HT) pipelines may be significantly affected by the effects of soil structure interaction (SSI) when subjected to earthquakes. Numerical simulations are herein applied to assess the role of soil deformability on the seismic vulnerability of an unburied pipeline. Overcoming [...] Read more.
Subsea high pressure/high temperature (HP/HT) pipelines may be significantly affected by the effects of soil structure interaction (SSI) when subjected to earthquakes. Numerical simulations are herein applied to assess the role of soil deformability on the seismic vulnerability of an unburied pipeline. Overcoming most of the contributions existing in the literature, this paper proposes a comprehensive 3D model of the system (soil + pipeline) by performing OpenSees that allows the representation of non-linear mechanisms of the soil and may realistically assess the induced damage caused by the mutual interaction of buckling and seismic loads. Analytical fragility curves are herein derived to evaluate the role of soil structure interaction in the assessment of the vulnerability of a benchmark HP/HT unburied subsea pipeline. The probability of exceeding selected limit states was based on the definition of credited failure criteria. Full article
(This article belongs to the Special Issue Subsea System Design)
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