TY - GEN
T1 - Suitability of a pile group foundation for an offshore wind turbine
AU - Kuo, Y. S.
AU - Abdel-Rahman, K.
AU - Wu, K. T.
AU - Huang, T. Y.
AU - Achmus, M.
PY - 2014
Y1 - 2014
N2 - Monopile, tripod and jacket structures are the most popular foundations adopted in offshore wind farms in Europe. Piles with diameters mostly larger than 2 m are usually installed for these foundations. More than 500 offshore wind turbines shall be installed in the Taiwan Strait in the next 20 years. However, due to limited pile driving capacity of the marine engineering industry in Taiwan, the pile group foundation with pile diameters of maximum D = 1.6 m is considered as foundation for offshore wind turbines and a research platform. This paper aims to investigate the behavior of multi-pile-soil system under monotonic lateral load. A three-dimensional finite element model with non-linear material behavior of the subsoil was established. The deformation responses of a pile group platform foundation calculated with FEM under monotonic lateral load are compared with the results calculated with a simplified approach based on the p-y-curves method. The bearing behavior of the pile group platform foundation cannot adequately considered by the simplified approach. To evaluate the suitability of group pile platform foundation, the deformation responses of a typical monopile are considered as reference values. The investigated pile group foundation is more flexible than the monopile, i.e the lateral deformations of the piles are much larger than the deformation of the monopile. However, due to the great stiffness of the platform plate the rotation of the platform is within the usual tolerance for offshore wind turbines and even smaller than the inclination of monopile.
AB - Monopile, tripod and jacket structures are the most popular foundations adopted in offshore wind farms in Europe. Piles with diameters mostly larger than 2 m are usually installed for these foundations. More than 500 offshore wind turbines shall be installed in the Taiwan Strait in the next 20 years. However, due to limited pile driving capacity of the marine engineering industry in Taiwan, the pile group foundation with pile diameters of maximum D = 1.6 m is considered as foundation for offshore wind turbines and a research platform. This paper aims to investigate the behavior of multi-pile-soil system under monotonic lateral load. A three-dimensional finite element model with non-linear material behavior of the subsoil was established. The deformation responses of a pile group platform foundation calculated with FEM under monotonic lateral load are compared with the results calculated with a simplified approach based on the p-y-curves method. The bearing behavior of the pile group platform foundation cannot adequately considered by the simplified approach. To evaluate the suitability of group pile platform foundation, the deformation responses of a typical monopile are considered as reference values. The investigated pile group foundation is more flexible than the monopile, i.e the lateral deformations of the piles are much larger than the deformation of the monopile. However, due to the great stiffness of the platform plate the rotation of the platform is within the usual tolerance for offshore wind turbines and even smaller than the inclination of monopile.
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M3 - Conference contribution
AN - SCOPUS:84906911024
SN - 9781880653913
T3 - Proceedings of the International Offshore and Polar Engineering Conference
SP - 222
EP - 226
BT - Proceedings of the 24th International Ocean and Polar Engineering Conference, ISOPE Busan
PB - International Society of Offshore and Polar Engineers
T2 - 24th International Ocean and Polar Engineering Conference, ISOPE 2014 Busan
Y2 - 15 June 2014 through 20 June 2014
ER -