This paper investigates the interaction of a managed ice floe with a downward breaking conical structure. The floe considered has width on the order of the structure’s waterline diameter. The investigation was motivated by the authors’ observations that peak loads in managed ice interaction model tests result from flexural breaking of the floes. The flexural failure load is determined analytically using a beam on an elastic foundation modified for the effects of a finite beam length corresponding to the floe size. This is compared to other limit states of floe rotation and ridge-building pressure to determine the controlling mechanism leading to a design load. Results are verified through comparison to model test data from experiments carried out by the authors at the Institute for Ocean Technology’s ice model test basin in St. John’s, Newfoundland.

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