ABSTRACT
This paper aims to offer novel correlation between all 4 components of PISA soil reaction curves for monopile modelling and Cone Penetration Testing (CPT) data. This approach requires minimum user inputs and offers a consistent approach to develop site-specific soil reaction curves when CPT data are made available. The procedure developed by Igoe and Jalilvand was used to derive small-strain hardening (HS-small) soil model parameters from a range of CPT profile. HS-small parameters are then used to model the monopile response to static lateral loading in sand using Plaxis 3D. This procedure has been validated by the authors against a database of large-scale field tests including PISA tests in the Dunkirk marine sand. Soil reaction curves were directly extracted from the Plaxis models then applied into Timoshenko beam elements to match the 3D FE response and validated the extraction process. It is demonstrated that current CPT based correlations do not match the shape nor the ultimate reaction of 3D FE extracted soil reaction curves. It is also shown that all four components of soil reactions are required to accurately model monopiles which are short and rigid.
