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The Effects of Free Field Ground Motion Analysis on Seismic Response of Offshore Piles

[+] Author Affiliations
Mehrdad Kimiaei

Petropars, Ltd., Tehran, Iran

Mohsen Ali Shayandar

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. OMAE2005-67344, pp. 681-688; 8 pages
doi:10.1115/OMAE2005-67344
From:
  • ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering
  • 24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 1, Parts A and B
  • Halkidiki, Greece, June 12–17, 2005
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 0-7918-4195-2 | eISBN: 0-7918-3759-9
  • Copyright © 2005 by ASME

abstract

Nonlinear response of piles is the most important source of potentially nonlinear behavior of pile-supported offshore platforms due to earthquake excitations. Earthquake design of offshore platforms is one of the main parts in offshore platforms design on which seismic soil pile structure interaction could be the main concern. In this paper, seismic response of offshore piles embedded in layered soil deposits is determined using a BNWF model (Beam on Nonlinear Winkler Foundation). Results of the free field ground motion analyses using equivalent-linear or nonlinear approaches are applied as input seismic excitations to the support nodes of BNWF model. Sensitivity of the results to input ground motions are discussed and addressed in this paper. Computed responses are also compared with centrifuge test results.

Copyright © 2005 by ASME

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