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OTO 2001/035

Interpretation of full-scale monitoring data from a jack-up rig

Summarises a study undertaken to determine the foundation fixity of the Maersk Endurer jack-up rig from measured data. This particular jack-up does not have spudcan skirts, therefore the results complement earlier studies on jack-ups having skirts. Several sea states from two storms were examined so that conclusions could be drawn on the possibility of foundation softening occurring during a storm. Foundation fixity was inferred from the observed natural period of the structure. Comparisons of measured maximum displacement with predicted values using the inferred fixity levels were also made. The conclusions are not necessarily valid for other structures or other locations.

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Updated 2010-03-19