Dynamic p-y analysis method based on cone penetration test results for monopiles in sand

In this study, a CPT-based dynamic p-y analysis method was proposed for the seismic design of piles in sand. The proposed method is aimed at establishing an effective seismic design method for monopiles by directly incorporating in-situ test results into the design process. For this purpose, the continuous and in-situ soil profiling capability of CPT is utilized, which can further enhance the seismic design of monopiles by minimizing uncertainties involved in soil characterization process based on sampling and lab testing procedure. The proposed method was established based on the pseudo-static analysis with the dynamic p-y curve and equivalent static load. The CPT-based p-y curve was formulated as a function of the cone resistance considering damping effect. The load responses of dynamic load test were compared with results obtained from the proposed method and the finite element analysis. It was shown that the proposed CPT-based dynamic p-y method was effective for the seismic design of monopiles.