Abstract
The effect of hydrodynamic loads from ocean waves on the strength of horizontal brace structures in semi-submersible platforms was studied. Fifteen different wave loads were considered, including seven used by the classification societies the American Bureau of Shipping and Det Norske Veritas. The results indicate that the torsional moments and shearing forces generated by the waves are the main loads affecting the strength of horizontal brace structures. The eight wave loads not used by the classification societies were found to have a significant effect on the strength of the brace structures and thus need to be considered when designing such structures.
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