Behavior of monopile foundations under cyclic lateral load |
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| Authors: | Martin Achmus Yu-Shu KuoKhalid Abdel-Rahman |
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| Institution: | Institute of Soil Mechanics, Foundation Engineering and Waterpower Engineering, Leibniz University of Hannover, Appelstr. 9A, Hannover 30167, Germany |
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| Abstract: | This paper describes the development and application of design charts for monopile foundations of offshore wind turbines in sandy soil under long-term cyclic lateral load. It outlines a numerical model, working with a numerical concept, which makes the calculation of accumulated displacements based on cyclic triaxial test results possible, and it describes important factors affecting the deformation response of a monopile to cyclic lateral loads. The effects of pile length, diameter and loading state on the accumulation rate of lateral deformation are presented and design charts are given, in which a normalized ultimate lateral resistance of a pile is used. For monopiles with very large diameter, the suitability of the “zero-toe-kick” and “vertical tangent” design critera for determining the required embedded length is discussed. |
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| Keywords: | Monopile Offshore wind turbine Cyclic load Lateral deformation Sand |
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