RELIABILITY ANALYSIS FOR SUCTION BUCKET AND GRAVITY-BASED FOUNDATIONS FOR OFFSHORE WIND TURBINES

Abstract

In this study, the reliability analysis is carried out for two different fixed-type offshore wind foundations, i.e. suction bucket and concrete gravity-based foundations considering the uncertainties in soil and structural parameters. In reliability analysis on concrete gravity-based foundations, vertical resistance, basement sliding, vertical and horizontal displacements, rocking and torsional rotations are defined as base limit states, while the vertical and horizontalresistances are utilized as limit state for the suction bucket foundations. The case studies are carried out using the preliminarily designed foundations at the Jeju Island sea and Southwest sea area of Korea respectively.