Probabilistic Estimation of Offshore Jacket Type Platforms Capacity Using Incremental Random Wave Analysis (IRWA)

based assessment of offshore jacket type platforms against wave loading. This approach can be employed to obtain a more realistic estimate for the ultimate capacity of offshore platforms, in comparison to the commonly used push-over analysis. On the other hand, ocean and sea waves are both random; they are irregular in shape, height, speed, period and directions. Therefore, one of the most important uncertainties in the offshore field loading is the stochastic nature of the waves. In this paper a probabilistic method has been proposed in order to estimate the ultimate capacity of offshore platforms subjected to random waves using IWA. To this end, a sufficient number of long-term simulations (3hours) and constrained simulations (using Constrained NewWave methodology) have been carried out.