Abstract
A probabilistic framework is presented to evaluate the load effects of wind-waves and seaquakes on a large floating island at a specific offshore site. Both long-term and short-term descriptions of loading are constructed. The long-term description of loading is given by the occurrence rates of each load intensity. On the other hand, the short-term description of loading is given by the spectral density functions in terms of each load intensity. For each load intensity, the stochastic response analysis of a large floating island is carried out on the basis of a wet-mode superposition approach and stationary random vibration theory. The site-specific responses which are conditional on the corresponding return periods are calculated. Numerical examples are presented to discuss the load effects of wind-waves and seaquakes on the large floating island with mooring system at different offshore sites.
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