Dynamic response of a porous seabed around pipeline under three-dimensional wave loading

Xiaoling Zhang, D. S. Jeng, M. T. Luan

    Research output: Contribution to journalArticle

    21 Citations (Scopus)

    Abstract

    The evaluation of the wave-induced pore pressure around a buried pipeline is particularly important for pipeline engineers involved in the design of offshore pipelines. Most previous investigations of the wave-induced dynamic response around an offshore pipeline have limited to two-dimensional cases. In this paper, a three-dimensional model including buried pipeline is established, based on the existing DYNE3WAC models. Based on the proposed numerical model and poro-elastic soil material assumption, the effects of wave and soil characteristics, such as wave period, water depth, shear modulus and permeability, and configuration of pipelines, such as pipeline radius and pipeline buried depth, on the wave-induced excess pore pressure will be examined. Numerical results indicated that the normalized excess pore pressures versus z/h near the pipeline increase as the obliquity angle, wave period and water depth increase, and they decrease as the burial depth and radius of pipeline increase above the pipeline. Soil permeability has obvious influence on the wave-induced normalized excess pore pressure, and different soil material will result in distinct computation results.
    Original languageEnglish
    Pages (from-to)785-791
    Number of pages7
    JournalSoil Dynamics and Earthquake Engineering
    Volume31
    Issue number5-6
    DOIs
    Publication statusPublished - 2011

    Fingerprint

    dynamic response
    Dynamic response
    Pipelines
    Pore pressure
    pore pressure
    Offshore pipelines
    Soils
    water depth
    soil
    permeability
    Water waves
    obliquity
    shear modulus
    Numerical models
    engineers
    Elastic moduli
    shear stress
    Engineers
    water

    Keywords

    • Dynamic response
    • Porous seabed
    • Wave loading
    • Pipeline

    Cite this

    Zhang, Xiaoling ; Jeng, D. S. ; Luan, M. T. / Dynamic response of a porous seabed around pipeline under three-dimensional wave loading. In: Soil Dynamics and Earthquake Engineering. 2011 ; Vol. 31, No. 5-6. pp. 785-791.
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    title = "Dynamic response of a porous seabed around pipeline under three-dimensional wave loading",
    abstract = "The evaluation of the wave-induced pore pressure around a buried pipeline is particularly important for pipeline engineers involved in the design of offshore pipelines. Most previous investigations of the wave-induced dynamic response around an offshore pipeline have limited to two-dimensional cases. In this paper, a three-dimensional model including buried pipeline is established, based on the existing DYNE3WAC models. Based on the proposed numerical model and poro-elastic soil material assumption, the effects of wave and soil characteristics, such as wave period, water depth, shear modulus and permeability, and configuration of pipelines, such as pipeline radius and pipeline buried depth, on the wave-induced excess pore pressure will be examined. Numerical results indicated that the normalized excess pore pressures versus z/h near the pipeline increase as the obliquity angle, wave period and water depth increase, and they decrease as the burial depth and radius of pipeline increase above the pipeline. Soil permeability has obvious influence on the wave-induced normalized excess pore pressure, and different soil material will result in distinct computation results.",
    keywords = "Dynamic response, Porous seabed, Wave loading, Pipeline",
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    Dynamic response of a porous seabed around pipeline under three-dimensional wave loading. / Zhang, Xiaoling; Jeng, D. S.; Luan, M. T.

    In: Soil Dynamics and Earthquake Engineering, Vol. 31, No. 5-6, 2011, p. 785-791.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Dynamic response of a porous seabed around pipeline under three-dimensional wave loading

    AU - Zhang, Xiaoling

    AU - Jeng, D. S.

    AU - Luan, M. T.

    N1 - dc.publisher: Elsevier

    PY - 2011

    Y1 - 2011

    N2 - The evaluation of the wave-induced pore pressure around a buried pipeline is particularly important for pipeline engineers involved in the design of offshore pipelines. Most previous investigations of the wave-induced dynamic response around an offshore pipeline have limited to two-dimensional cases. In this paper, a three-dimensional model including buried pipeline is established, based on the existing DYNE3WAC models. Based on the proposed numerical model and poro-elastic soil material assumption, the effects of wave and soil characteristics, such as wave period, water depth, shear modulus and permeability, and configuration of pipelines, such as pipeline radius and pipeline buried depth, on the wave-induced excess pore pressure will be examined. Numerical results indicated that the normalized excess pore pressures versus z/h near the pipeline increase as the obliquity angle, wave period and water depth increase, and they decrease as the burial depth and radius of pipeline increase above the pipeline. Soil permeability has obvious influence on the wave-induced normalized excess pore pressure, and different soil material will result in distinct computation results.

    AB - The evaluation of the wave-induced pore pressure around a buried pipeline is particularly important for pipeline engineers involved in the design of offshore pipelines. Most previous investigations of the wave-induced dynamic response around an offshore pipeline have limited to two-dimensional cases. In this paper, a three-dimensional model including buried pipeline is established, based on the existing DYNE3WAC models. Based on the proposed numerical model and poro-elastic soil material assumption, the effects of wave and soil characteristics, such as wave period, water depth, shear modulus and permeability, and configuration of pipelines, such as pipeline radius and pipeline buried depth, on the wave-induced excess pore pressure will be examined. Numerical results indicated that the normalized excess pore pressures versus z/h near the pipeline increase as the obliquity angle, wave period and water depth increase, and they decrease as the burial depth and radius of pipeline increase above the pipeline. Soil permeability has obvious influence on the wave-induced normalized excess pore pressure, and different soil material will result in distinct computation results.

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    KW - Porous seabed

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