Pile supported offshore platforms in seismically active areas should be designed to survive severe earthquake excitations with no global structural failure. It is often required to perform nonlinear seismic analysis of offshore platforms that accounts for soil nonlinearity, discontinuity condition at pile soil interfaces, energy dissipation through soil radiation damping and structural nonlinear behaviours of the piles. In this study a BNWF (Beam on Nonlinear Winkler Foundation) model is incorporated into a finite element program (ANSYS) and it is used to compute the lateral response of piles subjected to seismic loading. The soil stiffness is established using the P-Y curve. The results of equivalent linear earthquake free field ground motion analyses are used as the input excitations at support nodes of the model. The components and advantages of this practical ANSYS model in seismic pile soil structure interaction analyses are discussed and addressed in detail. Computed responses compared well with the experimental test results. Sensitivity of the results to model parameters and site response calculations are evaluated.
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ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering
June 20–25, 2004
Vancouver, British Columbia, Canada
Conference Sponsors:
- Ocean, Offshore, and Arctic Engineering Division
ISBN:
0-7918-3743-2
PROCEEDINGS PAPER
Non Linear Seismic Pile Soil Structure Interaction Analysis of Piles in Offshore Platforms
Mehrdad Kimiaei,
Mehrdad Kimiaei
Iran University of Science and Technology, Tehran, Iran
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Mohsen Ali Shayanfar,
Mohsen Ali Shayanfar
Iran University of Science and Technology, Tehran, Iran
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M. Hesham El Naggar,
M. Hesham El Naggar
University of Western Ontario, London, ON, Canada
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Ali Akbar Aghakouchak
Ali Akbar Aghakouchak
Tarbiat Modarres University, Tehran, Iran
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Mehrdad Kimiaei
Iran University of Science and Technology, Tehran, Iran
Mohsen Ali Shayanfar
Iran University of Science and Technology, Tehran, Iran
M. Hesham El Naggar
University of Western Ontario, London, ON, Canada
Ali Akbar Aghakouchak
Tarbiat Modarres University, Tehran, Iran
Paper No:
OMAE2004-51006, pp. 9-16; 8 pages
Published Online:
December 22, 2008
Citation
Kimiaei, M, Shayanfar, MA, El Naggar, MH, & Aghakouchak, AA. "Non Linear Seismic Pile Soil Structure Interaction Analysis of Piles in Offshore Platforms." Proceedings of the ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering. 23rd International Conference on Offshore Mechanics and Arctic Engineering, Volume 1, Parts A and B. Vancouver, British Columbia, Canada. June 20–25, 2004. pp. 9-16. ASME. https://doi.org/10.1115/OMAE2004-51006
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