2024 Volume 80 Issue 18 Article ID: 24-18026
Recently, monopile type foundation is popularly used for fixed foundation for offshore wind facilities and has tended to make the penetration length as short as possible, based on the JIP project "PISA" in Europe. In the PISA project onshore field tests are conducted and developed the enhanced 1D beam-spring models compared with 3D FEM analysis. In this project, monotonic loading tests were conducted on sandy and clay soils, and field loading tests are recommended, but field tests are not easy to conduct in terms of materials and measurement scale, such as using steel piles with a diameter of 1-2 m to simulate the prototype monopile.
Therefore, the model tests such as centrifuge tests may be applied. However, there are no examples of generalized scaling law for static behavior, while there are some studies on the dynamic response of structures, including soils, using generalized scaling law that combines the 1G field scaling law and the centrifugal field scaling law. In this paper the application of the generalized scaling law to monotonic loading tests using centrifuge loading tests is focused, where the scale of experiments is relatively small, to analyze the behavior of piles depending on the penetration length and to reproduce it using a beam spring model. As a result, the static response of the prototype with 3/β was reproduced by the application of generalized scaling law and as to 1/β and 2/β, more modified calculation method should be considered.
