ON-BOTTOM STABILITY DESIGN OF SUBMARINE PIPELINES-A PROBABILISTIC APPROACH

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AMLASHI HADI

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Journal Paper

Paper Information

Journal: International Journal of Coastal, Offshore and Environmental Engineering Year:2017 | Volume:1 | Issue:3 Page(s): 29-40

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Title

ON-BOTTOM STABILITY DESIGN OF SUBMARINE PIPELINES-A PROBABILISTIC APPROACH

Author(s)

AMLASHI HADI | Issue Writer Certificate

Keywords

SUBMARINE PIPELINES

ON-BOTTOM LATERAL STABILITY

SERVICEABILITY LIMIT STATE (SLS)

DNV-OS-F101

DNV-RP-F109

MONTE CARLO SIMULATION (MCS)

WAVE

CURRENT

SOIL PASSIVE RESISTANCE

Abstract

Un-trenched SUBMARINE PIPELINES will experience the WAVE and CURRENT loads during their design lifetime which potentially tend to destabilize the pipeline both horizontally and vertically. These forces are resisted by the interaction of the pipe with the surrounding soil. Due to the uncertainties involved in the WAVEs, CURRENTs and soil conditions, there will be a complex interaction between the WAVE/current, pipeline and seabed that needs to be properly accounted for. The design of SUBMARINE PIPELINES against excessive displacements due to hydrodynamic loads (DNV-RP-F109) is defined as a Serviceability Limit State (SLS) with the target safety levels as given in DNVOS-F101 (2013). In this paper, uncertainties associated with the on-bottom stability design of SUBMARINE PIPELINES are investigated. Monte Carlo Simulations (MCS) are performed as the basis for the probabilistic assessment of the lateral stability of the pipeline located on the seabed. Application of the method is illustrated through case studies varying several design parameters to illustrate the importance of each design parameter for exceeding a given threshold of the SLS criterion. Uncertainties in the significant WAVE height and spectral peak period are found to be important parameters in describing the Utilization Ratio (UR) distribution. Type of the soil has also an impact on the distribution of UR, i.e. how the passive soil resistance in the pipe-soil interaction model is accounted for. Therefore, the definition of characteristic values of both loads and resistance variables are important for the UR.

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APA: Copy

AMLASHI, HADI. (2017). ON-BOTTOM STABILITY DESIGN OF SUBMARINE PIPELINES-A PROBABILISTIC APPROACH. INTERNATIONAL JOURNAL OF COASTAL, OFFSHORE AND ENVIRONMENTAL ENGINEERING, 1(3), 29-40. SID. https://sid.ir/paper/352389/en

Vancouver: Copy

AMLASHI HADI. ON-BOTTOM STABILITY DESIGN OF SUBMARINE PIPELINES-A PROBABILISTIC APPROACH. INTERNATIONAL JOURNAL OF COASTAL, OFFSHORE AND ENVIRONMENTAL ENGINEERING[Internet]. 2017;1(3):29-40. Available from: https://sid.ir/paper/352389/en

IEEE: Copy

HADI AMLASHI, “ON-BOTTOM STABILITY DESIGN OF SUBMARINE PIPELINES-A PROBABILISTIC APPROACH,” INTERNATIONAL JOURNAL OF COASTAL, OFFSHORE AND ENVIRONMENTAL ENGINEERING, vol. 1, no. 3, pp. 29–40, 2017, [Online]. Available: https://sid.ir/paper/352389/en

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