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ACP TR-2-2025
Cyclic Degradation in the Geotechnical Design of Wind Turbine Foundations Technical Report
This report reviews the behavior of foundation support geomaterials under cyclic loading for various onshore wind turbine foundation types, emphasizing the importance of design in limiting geomaterial degradation. It is motivated by the need to ensure satisfactory foundation performance throughout the service life, particularly when the foundation-geomaterial interface is subjected to frequent cycles between compression and zero loading. Load cases are presented with reference to the ACP 61400-6 standard. The report provides design recommendations for different foundation systems and soil types, along with general guidance on laboratory testing, numerical modeling, in-service monitoring, and issue mitigation.
American National Standards Institute [ansi]