Blar i Norwegian Geotechnical Institute (NGI) Digital Archive på forfatter "Skau, Kristoffer Skjolden"
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A macro-element for integrated time domain analyses representing bucket foundations for offshore wind turbines
Skau, Kristoffer Skjolden; Grimstad, Gustav; Page, Ana M.; Eiksund, Gudmund Reidar; Jostad, Hans Petter (Peer reviewed; Journal article, 2018)The paper presents a macro-element model for bucket foundations to be used in integrated time domain analyses of offshore wind turbines. The macro-element has been formulated in the multi-surface plasticity framework, and ... -
A New Foundation Model for Integrated Analyses of Monopile-based Offshore Wind Turbines
Page, Ana M.; Skau, Kristoffer Skjolden; Jostad, Hans Petter; Eiksund, Gudmund Reidar (Peer reviewed; Journal article, 2017)Offshore wind turbines are highly dynamic and tightly coupled systems subjected to variable cyclic loads. Designing and optimizing the support structure is a complex task, where several load scenarios have to be analysed ... -
A numerical study of capacity and stiffness of circular skirted foundations in clay subjected to combined static and cyclic general loading
Skau, Kristoffer Skjolden; Chen, Ying; Jostad, Hans Petter (Peer reviewed; Journal article, 2017)Skirted foundations have been widely applied as offshore foundations for several decades. In design, the use of failure envelopes is convenient for assessing stability under combined loading. A large number of studies on ... -
Effect of foundation modelling on the fatigue lifetime of a monopile-based offshore wind turbine
Aasen, Steffen; Page, Ana M.; Skau, Kristoffer Skjolden; Nygaard, Tor Anders (Peer reviewed; Journal article, 2017) -
Foundation model 1 - 1D an 3D parallel coupled models
Skau, Kristoffer Skjolden (NGI Rapport;20150014-04-R, Report, 2017-01-20)The report presents a macro elements model developed to calculate p-y soil and foundation response during cyclic loading. The concept of parallel coupling of linear elastic perfectly plastic sub-models. One is model ... -
Modelling of soil-structure-interaction for flexible caissons for offshore wind turbines
Skau, Kristoffer Skjolden; Jostad, Hans Petter; Eiksund, Gudmund Reidar; Sturm, Hendrik (Peer reviewed; Journal article, 2018)Published foundation models and procedures for calculation of caisson foundation response typically assume a rigid caisson in deformable soil. However, recent published measurement data from a prototype suction bucket ... -
REDWIN – REDucing cost in offshore WINd by integrated structural and geotechnical design
Skau, Kristoffer Skjolden; Page, Ana M.; Kaynia, Amir M.; Løvholt, Finn; Norén-Cosgriff, Karin; Sturm, Hendrik; Andersen, H.S.; Nygaard, Tor Anders; Jostad, Hans Petter; Eiksund, Gudmund Reidar; Havmøller, O.; Strøm, P.; Eichler, D. (Peer reviewed; Journal article, 2018)The cost of offshore wind energy production has to be reduced continuously to improve its competitiveness compared to other energy sources. To contribute to this goal, a 4- year research project REDWIN – REDucing cost of ... -
Response of lightly over-consolidated clay under irregular cyclic loading and comparison with predictions from the strain accumulation procedure
Skau, Kristoffer Skjolden; Dahl, Birgitte Misund; Jostad, Hans Petter; Suzuki, Yusuke; Sordi, Jerome De; Havmoller, Ole (Peer reviewed; Journal article, 2022)