Wave-induced dynamic response of a layered poroelastic seabed around an offshore pipeline

X.-L. Zhou, H.-J. Zhang, J.-S. Zhang

    Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

    Abstract

    The main objective of this paper is to investigate the wave-induced dynamic response of seabed around a pipeline in a multi-layered porous seabed. Biot's poro-elastic theory is employed to describe the phenomenon of wave-seabed-pipeline interaction in a layered porous seabed. To explore the mechanism of the pipeline instability, the partly dynamic model, u-p model is adopted, where the soil displacement (u) and the pore pressure (p) are the primary variables and it is capable of considering the acceleration of soil skeleton. A parametric study is carried out to examine the influences of various representative seabed and wave parameters. The influence of pipeline buried depth on seabed response is also investigated. The results show that the pore pressure decreases when permeability decreases. The pore pressure concentration reduces as the buried depth e increases, while the vertical stress on the pipeline surface increases as the buried depth increases.
    Original languageEnglish
    Title of host publicationProceedings of the International Offshore and Polar Engineering Conference
    Pages349-354
    Number of pages6
    Publication statusPublished - 2012
    Event22nd International Offshore and Polar Engineering Conference, - Rhodes, Greece
    Duration: 17 Jun 201222 Jun 2012
    http://www.isope.org/publications/proceedings/ISOPE/ISOPE%202012/start.htm

    Conference

    Conference22nd International Offshore and Polar Engineering Conference,
    Abbreviated titleISOPE-2012
    CountryGreece
    CityRhodes
    Period17/06/1222/06/12
    Internet address

    Fingerprint

    Offshore pipelines
    Dynamic response
    Pipelines
    Pore pressure
    Soils
    Dynamic models

    Cite this

    Zhou, X-L., Zhang, H-J., & Zhang, J-S. (2012). Wave-induced dynamic response of a layered poroelastic seabed around an offshore pipeline. In Proceedings of the International Offshore and Polar Engineering Conference (pp. 349-354)
    Zhou, X.-L. ; Zhang, H.-J. ; Zhang, J.-S. / Wave-induced dynamic response of a layered poroelastic seabed around an offshore pipeline. Proceedings of the International Offshore and Polar Engineering Conference. 2012. pp. 349-354
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    author = "X.-L. Zhou and H.-J. Zhang and J.-S. Zhang",
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    Zhou, X-L, Zhang, H-J & Zhang, J-S 2012, Wave-induced dynamic response of a layered poroelastic seabed around an offshore pipeline. in Proceedings of the International Offshore and Polar Engineering Conference. pp. 349-354, 22nd International Offshore and Polar Engineering Conference, , Rhodes, Greece, 17/06/12.

    Wave-induced dynamic response of a layered poroelastic seabed around an offshore pipeline. / Zhou, X.-L.; Zhang, H.-J.; Zhang, J.-S.

    Proceedings of the International Offshore and Polar Engineering Conference. 2012. p. 349-354.

    Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

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    AB - The main objective of this paper is to investigate the wave-induced dynamic response of seabed around a pipeline in a multi-layered porous seabed. Biot's poro-elastic theory is employed to describe the phenomenon of wave-seabed-pipeline interaction in a layered porous seabed. To explore the mechanism of the pipeline instability, the partly dynamic model, u-p model is adopted, where the soil displacement (u) and the pore pressure (p) are the primary variables and it is capable of considering the acceleration of soil skeleton. A parametric study is carried out to examine the influences of various representative seabed and wave parameters. The influence of pipeline buried depth on seabed response is also investigated. The results show that the pore pressure decreases when permeability decreases. The pore pressure concentration reduces as the buried depth e increases, while the vertical stress on the pipeline surface increases as the buried depth increases.

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    BT - Proceedings of the International Offshore and Polar Engineering Conference

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    Zhou X-L, Zhang H-J, Zhang J-S. Wave-induced dynamic response of a layered poroelastic seabed around an offshore pipeline. In Proceedings of the International Offshore and Polar Engineering Conference. 2012. p. 349-354