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Abstract:	Pfahlgründungen sind eine weitverbreitete Gründungsvariante für Offshore-Windenergieanlagen (OWEA) und sind in diesem Anwendungsgebiet erheblichen horizontalen Lasten ausgesetzt. Diese Belastung variiert in ihrer Amplitude, Frequenz sowie Richtung und ist naturgemäß sehr schwierig zu prognostizieren. Bereits existierende Ergebnisse von Modellversuchen berücksichtigen bislang keine Änderung der Lastrichtung und sind daher nur für eindimensionale Belastungen applikabel. Untersuchungen konnten zeigen, dass eine richtungsveränderliche zyklische Belastung zu größeren Verschiebungen führen kann als eine äquivalente eindimensionale zyklische Belastung. In diesem Beitrag wird das Phänomen anhand von Modellvorstellungen erläutert und anhand der Ergebnisse von Modellversuchen quantitativ betrachtet. On the deformation behavior of laterally loaded piles with cyclic loading from a varying direction. Pile foundations are a common foundation for offshore wind energy converters. In this application area they are subjected to large lateral loading. This loading varies in amplitude, frequency and direction and is difficult to predict. Currently available analytical design methods derived from model tests do not consider a change in loading direction and are therefore applicable for one-dimensional loading only. Investigations have shown that a change in loading direction results in higher displacements compared to an equivalent one-dimensional cyclic loading. In this article models are presented to explain the increasing displacements and to be compared against results from physical modeling.
Source:	geotechnik 36 (2013), No. 2
Page/s:	90-95
Language of Publication:	German

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