An improved analytical approach for simulating the lateral kinematic distress of deepwater offshore pipelines |
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| Institution: | 1. School of Environmental Engineering, Technical University of Crete, Greece;2. School of Environmental Engineering, Technical University of Crete, Greece;3. School of Rural and Surveying Engineering, National Technical University of Athens, Greece;1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;2. Department of Civil, Environmental and Geomatic Engineering, University College London, London WC1E 6BT, UK;1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, 116024, China;2. School of Urban and Environmental Science, Liaoning Normal University, Dalian, 116029, China;3. Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Natural Resources, Qingdao, 266071, China;1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, 116024, China;2. Department of Geoscience, Shimane University, Matsue, Shimane, 690-8504, Japan;3. College of Civil Engineering, Fuzhou University, Fuzhou, 350108, China |
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| Abstract: | Offshore pipelines are critical infrastructures and any possible damage may have devastating financial and environmental consequences. Earthquake-related geohazards (such as strong ground motion, active seismic faults, submarine landslides and debris flows) consist crucial threats that an offshore pipeline has to overcome. The main aim of the current study is to examine analytically a seabed-laid offshore pipeline subjected to a lateral kinematic distress due to a submarine landslide or a debris flow. Extra emphasis is given on the impact of pipe-soil interaction on the pipe response, by the realistic representation of the soil resistance via a tri-linear model. Firstly, the proposed analytical model is validated with a numerical model utilizing the finite-element method. Subsequently, various combinations of soil parameters and loading conditions that affect the examined problem are investigated with realistic input data taken from the offshore section of the high-pressure natural-gas pipeline TAP (Trans Adriatic Pipeline) in the Adriatic Sea. Finally, useful conclusions are drawn regarding the applicability and the efficiency of the proposed approach. |
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| Keywords: | Offshore pipelines Submarine landslides Kinematic distress Pipe-soil interaction Analytical model |
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