Dynamic response of a porous seabed-pipeline interaction under wave loading

Soil-pipeline contact effects and inertial effects

M. Luan, P. Qu, D.-S. Jeng, Y. Guo, Q. Yang

    Research output: Contribution to journalArticle

    25 Citations (Scopus)

    Abstract

    The existing models for the pore pressure and internal stresses within the pipeline under wave loading have mainly based on the assumption of no-slip boundary condition at the interface between pipeline and soil particles. In this paper, soil-pipeline contact effects and inertial forces are considered in the new model. A comprehensive comparison between the experimental data available and the present model is performed and showing good agreements. Based on the numerical results, it is found that soil-pipeline contact effects significantly affect the internal stresses. The maximum difference of internal normal stress can reach 50 times of p. On the other hand, inclusion of inertial terms will only affect the pore pressure acting on the pipeline. Numerical examples also conclude that the difference of internal normal stresses between the present model (with contact effects and inertial terms) and previous work (without contact effects and inertial terms) increases as the depth (s) of the trench layer decreases, but as the width of the trench layer (l) increases. Finally, we compare three different types of trench shapes, rectangle, trapezoid and triangle trench layers, and found that triangle trench layer will reduce the pore pressure, but increase the internal stresses.
    Original languageEnglish
    Pages (from-to)173-186
    Number of pages14
    JournalComputers and Geotechnics
    Volume35
    Issue number2
    DOIs
    Publication statusPublished - 1 Mar 2008

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    dynamic response
    Dynamic response
    trench
    Pipelines
    Pore pressure
    Soils
    pore pressure
    Residual stresses
    soil
    boundary condition
    soil loading
    effect
    Boundary conditions

    Cite this

    @article{aa37c0a78f5b4e86bf11396bb1dd99fc,
    title = "Dynamic response of a porous seabed-pipeline interaction under wave loading: Soil-pipeline contact effects and inertial effects",
    abstract = "The existing models for the pore pressure and internal stresses within the pipeline under wave loading have mainly based on the assumption of no-slip boundary condition at the interface between pipeline and soil particles. In this paper, soil-pipeline contact effects and inertial forces are considered in the new model. A comprehensive comparison between the experimental data available and the present model is performed and showing good agreements. Based on the numerical results, it is found that soil-pipeline contact effects significantly affect the internal stresses. The maximum difference of internal normal stress can reach 50 times of p. On the other hand, inclusion of inertial terms will only affect the pore pressure acting on the pipeline. Numerical examples also conclude that the difference of internal normal stresses between the present model (with contact effects and inertial terms) and previous work (without contact effects and inertial terms) increases as the depth (s) of the trench layer decreases, but as the width of the trench layer (l) increases. Finally, we compare three different types of trench shapes, rectangle, trapezoid and triangle trench layers, and found that triangle trench layer will reduce the pore pressure, but increase the internal stresses.",
    author = "M. Luan and P. Qu and D.-S. Jeng and Y. Guo and Q. Yang",
    note = "Copyright 2008 Elsevier B.V., All rights reserved.",
    year = "2008",
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    doi = "10.1016/j.compgeo.2007.05.004",
    language = "English",
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    Dynamic response of a porous seabed-pipeline interaction under wave loading : Soil-pipeline contact effects and inertial effects. / Luan, M.; Qu, P.; Jeng, D.-S.; Guo, Y.; Yang, Q.

    In: Computers and Geotechnics, Vol. 35, No. 2, 01.03.2008, p. 173-186.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Dynamic response of a porous seabed-pipeline interaction under wave loading

    T2 - Soil-pipeline contact effects and inertial effects

    AU - Luan, M.

    AU - Qu, P.

    AU - Jeng, D.-S.

    AU - Guo, Y.

    AU - Yang, Q.

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    PY - 2008/3/1

    Y1 - 2008/3/1

    N2 - The existing models for the pore pressure and internal stresses within the pipeline under wave loading have mainly based on the assumption of no-slip boundary condition at the interface between pipeline and soil particles. In this paper, soil-pipeline contact effects and inertial forces are considered in the new model. A comprehensive comparison between the experimental data available and the present model is performed and showing good agreements. Based on the numerical results, it is found that soil-pipeline contact effects significantly affect the internal stresses. The maximum difference of internal normal stress can reach 50 times of p. On the other hand, inclusion of inertial terms will only affect the pore pressure acting on the pipeline. Numerical examples also conclude that the difference of internal normal stresses between the present model (with contact effects and inertial terms) and previous work (without contact effects and inertial terms) increases as the depth (s) of the trench layer decreases, but as the width of the trench layer (l) increases. Finally, we compare three different types of trench shapes, rectangle, trapezoid and triangle trench layers, and found that triangle trench layer will reduce the pore pressure, but increase the internal stresses.

    AB - The existing models for the pore pressure and internal stresses within the pipeline under wave loading have mainly based on the assumption of no-slip boundary condition at the interface between pipeline and soil particles. In this paper, soil-pipeline contact effects and inertial forces are considered in the new model. A comprehensive comparison between the experimental data available and the present model is performed and showing good agreements. Based on the numerical results, it is found that soil-pipeline contact effects significantly affect the internal stresses. The maximum difference of internal normal stress can reach 50 times of p. On the other hand, inclusion of inertial terms will only affect the pore pressure acting on the pipeline. Numerical examples also conclude that the difference of internal normal stresses between the present model (with contact effects and inertial terms) and previous work (without contact effects and inertial terms) increases as the depth (s) of the trench layer decreases, but as the width of the trench layer (l) increases. Finally, we compare three different types of trench shapes, rectangle, trapezoid and triangle trench layers, and found that triangle trench layer will reduce the pore pressure, but increase the internal stresses.

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