Lateral behaviour of large-diameter pile based on p-y curve and solid FEM method
[Objective]With the rapid increasing of offshore wind power in China,monopiles with diameters exceeding 2 m are widely used.As these piles are subjected to lateral loads caused by wind,wave,and current,the designs of the pile foundations supporting offshore wind turbines are significantly influenced by their lateral behaviors.In order to research the current problems in the design of large-diameter monopiles and provide the reference for the design of offshore wind turbine foundations,[Meth-ods]field tests of largest-diameter monopiles on the sea and additional analysis based on FEM and p-y curves are carried out,to reveal the response of monopiles subjected to lateral loads.[Results]The results revealed that the p-y curves proposed by API code for clay showed much"softer"response,which resulted in the conservative design of the piles;Solid FEM relied heavily on the choosing of used parameters.At relatively small deflections,the solid FEM presented reasonable result as compared with the tests,which however was supposed to over-estimate the ultimate capacity of the piles.[Conclusion]The results also indicated the importance of the influence of pile-soil gap and the application of parameter analysis to achieve the relatively conservative result,if the solid FEM is adopted in the design.
offshore wind powerfield testmonopilelateral loadp-y curvesolid finite element method
万方数据
维普
