Nonlinear seismic soil-pile-structure interaction analysis of fixed offshore platforms
A nonlinear seismic soil-pile-structure interaction (SSPSI) analysis of fixed offshore platforms constructed on pile foundations including both vertical and battered piles is presented. The analysis is carried out in time domain and the effects of soil nonlinearity, discontinuity at pile soil interf...
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ftqueensland:oai:eprints.qut.edu.au:232244 2024-02-04T09:56:21+01:00 Nonlinear seismic soil-pile-structure interaction analysis of fixed offshore platforms Zargar, Ehssan Aghakouchak, Ali Akbar Gholami, Maziar 2009 https://eprints.qut.edu.au/232244/ unknown American Society of Mechanical Engineers (ASME) doi:10.1115/OMAE2009-80153 Zargar, Ehssan, Aghakouchak, Ali Akbar, & Gholami, Maziar (2009) Nonlinear seismic soil-pile-structure interaction analysis of fixed offshore platforms. In Proceedings of the 28th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2009). American Society of Mechanical Engineers (ASME), United States of America, pp. 851-859. https://eprints.qut.edu.au/232244/ 2009 ASME This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au Proceedings of the 28th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2009) Chapter in Book, Report or Conference volume 2009 ftqueensland https://doi.org/10.1115/OMAE2009-80153 2024-01-09T00:08:09Z A nonlinear seismic soil-pile-structure interaction (SSPSI) analysis of fixed offshore platforms constructed on pile foundations including both vertical and battered piles is presented. The analysis is carried out in time domain and the effects of soil nonlinearity, discontinuity at pile soil interfaces, energy dissipation through soil radiation damping, formation of soil layers on bed rock, structural material nonlinearity and geometrical nonlinearity are considered. A combination of FEM approach and BNWF approach is used in modeling pile (substructure), platform structure (superstructure) and soil media. Gapping in clay is modeled by a special connector configuration. To find out the ground motion of soil layers caused by earthquake excitations at bed rock, a nonlinear site response analysis is performed. The effects of soil-pile-structure interaction on nonlinear seismic analysis of offshore platforms are discussed. A comparison of SSPSI model and pile stub modeling is investigated and it is generally concluded that considering soil-pile-structure interaction causes higher deflections and lower stresses in the platform elements due to soil flexibility, nonlinearity and radiation damping and leads to a more feasible and realistic platform design. The sequence of generation of plastic zones in the structure and their distribution are also investigated. Results show that this nonlinear behavior is started at brace elements and then propagated to leg elements as earthquake last. Book Part Arctic Queensland University of Technology: QUT ePrints Volume 1: Offshore Technology 851 859 |
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Open Polar |
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Queensland University of Technology: QUT ePrints |
op_collection_id |
ftqueensland |
language |
unknown |
description |
A nonlinear seismic soil-pile-structure interaction (SSPSI) analysis of fixed offshore platforms constructed on pile foundations including both vertical and battered piles is presented. The analysis is carried out in time domain and the effects of soil nonlinearity, discontinuity at pile soil interfaces, energy dissipation through soil radiation damping, formation of soil layers on bed rock, structural material nonlinearity and geometrical nonlinearity are considered. A combination of FEM approach and BNWF approach is used in modeling pile (substructure), platform structure (superstructure) and soil media. Gapping in clay is modeled by a special connector configuration. To find out the ground motion of soil layers caused by earthquake excitations at bed rock, a nonlinear site response analysis is performed. The effects of soil-pile-structure interaction on nonlinear seismic analysis of offshore platforms are discussed. A comparison of SSPSI model and pile stub modeling is investigated and it is generally concluded that considering soil-pile-structure interaction causes higher deflections and lower stresses in the platform elements due to soil flexibility, nonlinearity and radiation damping and leads to a more feasible and realistic platform design. The sequence of generation of plastic zones in the structure and their distribution are also investigated. Results show that this nonlinear behavior is started at brace elements and then propagated to leg elements as earthquake last. |
format |
Book Part |
author |
Zargar, Ehssan Aghakouchak, Ali Akbar Gholami, Maziar |
spellingShingle |
Zargar, Ehssan Aghakouchak, Ali Akbar Gholami, Maziar Nonlinear seismic soil-pile-structure interaction analysis of fixed offshore platforms |
author_facet |
Zargar, Ehssan Aghakouchak, Ali Akbar Gholami, Maziar |
author_sort |
Zargar, Ehssan |
title |
Nonlinear seismic soil-pile-structure interaction analysis of fixed offshore platforms |
title_short |
Nonlinear seismic soil-pile-structure interaction analysis of fixed offshore platforms |
title_full |
Nonlinear seismic soil-pile-structure interaction analysis of fixed offshore platforms |
title_fullStr |
Nonlinear seismic soil-pile-structure interaction analysis of fixed offshore platforms |
title_full_unstemmed |
Nonlinear seismic soil-pile-structure interaction analysis of fixed offshore platforms |
title_sort |
nonlinear seismic soil-pile-structure interaction analysis of fixed offshore platforms |
publisher |
American Society of Mechanical Engineers (ASME) |
publishDate |
2009 |
url |
https://eprints.qut.edu.au/232244/ |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Proceedings of the 28th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2009) |
op_relation |
doi:10.1115/OMAE2009-80153 Zargar, Ehssan, Aghakouchak, Ali Akbar, & Gholami, Maziar (2009) Nonlinear seismic soil-pile-structure interaction analysis of fixed offshore platforms. In Proceedings of the 28th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2009). American Society of Mechanical Engineers (ASME), United States of America, pp. 851-859. https://eprints.qut.edu.au/232244/ |
op_rights |
2009 ASME This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au |
op_doi |
https://doi.org/10.1115/OMAE2009-80153 |
container_title |
Volume 1: Offshore Technology |
container_start_page |
851 |
op_container_end_page |
859 |
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1789960900359225344 |