Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-39340 Buchkapitel Rücker, Werner; Cuéllar, Pablo; Georgi, Steven; Karabeliov, Krassimire; Baeßler, Matthias; Johnsen, Björn Durstewitz, M.; Lange, B. Please Avoid Tilting - Application-Oriented Design and Monitoring Model for Foundation Structures Subjected to Cyclic Loads A great deal is possible, even on the seabed. Together, wind and waves shake the foundations of the offshore wind turbines. "ere is also the "normal" current and ebb and #ow of the tides that are so distinctive in the North Sea. Pore water pressure can also occur on the seabed, loosening it. Where monopiles are involved, the worst case is that the stability of the whole turbine can be altered - even if such a monopile rammed into the seabed has a diameter of up to eight metres. Over half the planned offshore wind turbines in the North and Baltic Seas are to have monopile foundations, and over 40 % are to have multi-pile foundations, designed for example as a tripod. "is is why pile foundations and their loads deserve special attention. For one thing above all is to be avoided in plant operations, and that is the risk of turbine tilt. Springer 2017 Sea, Wind, Power 978-3-662-53178-5 53 59 10.1007/978-3-662-53179-2 2017-03-14 OPUS4-39341 Buchkapitel Baeßler, Matthias; Cuéllar, Pablo; Georgi, Steven; Karabeliov, Krassimire; Rücker, Werner; Johnsen, Björn Durstewitz, M.; Lange, B. Uncharted Territory on the Seabed - Monitoring Procedures and Assessment Model for the Foundations of Offshore Wind Turbines Offshore wind turbines enter unknown territory, especially where the foundations are concerned. This is because offshore wind power can only make use of the experience from the common offshore constructions used by the oil and gas industry to a limited extent. The offshore wind industry has tried to reduce foundation dimensions, especially the pile lengths, as much as possible compared with those of the oil and gas industry. This is because with the large number of wind turbines involved it can provide considerable economic advantages. On the other hand, the stability of the foundations is additionally at risk because due to the much larger number of cyclic loads they are subjected to it is very difficult to predict how they will behave. Since offshore wind farms are manufactured in series, every systematic fault in the foundation acts as a series fault for a large number of turbines. This calls for monitoring - and the right dimensions of pile foundation, the most common type of foundations used for wind turbines Springer 2017 Sea, Wind, Power 978-3-662-53178-5 61 67 10.1007/978-3-662-53179-2 2017-03-14