As the recommended standard method by the American Petroleum Institute(API),the p-y curve method has been widely used in the calculation and analysis of horizontally loaded piles.With the increase in the size of offshore single pile foundations,the applicability of the API standard p-y curves derived based on flexible long piles has been increasingly questioned.Taking the horizontal static load test of a large-diameter single pile foundation in a certain offshore wind farm in China as the engineering background,this paper analyzes the horizontal load-deformation characteristics of the test piles.Based on the measured data,the calculation effects of four commonly used p-y curve methods are compared.Combined with the three-dimensional finite element simulation,the influence of foundation size on the form of the p-y curves is analyzed,and the applicable working conditions of the above p-y curves are discussed.The results show that the API method is not suitable for the analysis and calculation of large-diameter piles.Among the four methods,the predicted values of the Sullivan method are most consistent with the measured values.Based on the results of field tests and finite element analysis,a modified p-y curve calculation method is proposed.The research results of this paper can provide a certain reference for the design of the horizontal bearing and deformation characteristics of large-diameter single piles in similar sea areas.
offshore wind powerlarge-diameter single pilefield pile testp-y curve
维普
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