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Author(s):	Seidel, Marc; Coronel, Maria Carmen
Title:	A new approach for assessing offshore piles subjected to cyclic axial loading
Abstract:	A new requirement of the BSH (Bundesamt für Seeschifffahrt und Hydrographie, the regulatory authority for offshore wind farms in Germany), is the assessment of the effect of cyclic loading on the capacity of foundations supporting offshore wind turbines. There are few practical design methods until now. This paper presents a new approach for assessing offshore piles subjected to cyclic axial loading, which combines two known methods, the approach for static loading as developed by the Imperial College of London (termed ICP approach) and a load-transfer-approach as incorporated in software “RATZ” for cyclic loading. Results using this method are compared against tests performed for the Health & Safety Executive (HSE) in Dunkirk and very good agreement is found. Ein neuer Ansatz für die Bemessung axial-zyklisch belasteter Pfähle von Offshore-Konstruktionen. Es ist eine Anforderung des BSH, dass die Wirkung zyklischer Belastung auf die Tragfähigkeit von Fundamenten von Offshore-Windenergieanlagen beurteilt wird. Bisher sind praktisch anwendbare Bemessungsmethoden selten. In diesem Beitrag wird ein neuer Ansatz vorgestellt, der zwei bekannte Methoden kombiniert, die ICP-Methode für die statische Belastung und ein Ansatz über Last-Verschiebungskurven für zyklische Belastung. Ergebnisse, die mit dieser Methode erzielt werden, werden mit Versuchen verglichen, die für die HSE in Dünkirchen durchgeführt wurden, und eine sehr gute Übereinstimmung wird festgestellt.
Source:	geotechnik 34 (2011), No. 4
Page/s:	276-284
Language of Publication:	German

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