The presentation will review classical approaches for linear and nonlinear behavior of foundations in offshore wind turbines on mono-piles. The traditional solution of p-y and extension to cyclic loading is briefly presented, and more recent macro-element models for mono-piles are discussed and their performance against field test data are demonstrated. Also addressed is handling of foundation damping which has been found to have a considerable effect on the fatigue lifetime of offshore wind turbines. Integrated soil-structure interaction analyses are discussed and their use in fatigue computations are illustrated.
Amir Kaynia has 30 years of experience in geotechnical, structural and earthquake engineering through research, teaching and consulting practice. Major fields of work include dynamic soil-structure interaction, geotechnical earthquake engineering, and vibration from high-speed railway lines. He received his MSc and PhD from MIT on dynamic soil-structure interaction, and is currently Technical Expert on Vibration and Earthquake Engineering at NGI. He is also Adjunct Prof. of structural engineering at Norwegian Univ. of Science and Technology (NTNU).Amir Kaynia has delivered numerous invited lectures at international conferences and is author/co-author of more than 160 technical papers in peer-reviewed journals and conference proceedings. He has taught undergraduate and graduate courses including earthquake engineering, soil and structural dynamics, and has supervised numerous MSc and PhD thesis researches. He is member of European committee on revision of Eurocode 8, Part 5, and is on the Editorial Board of journals of Soils Dyn. & Earthquake Eng. and Transportation Geotechnics.