Ice Loads on Structures With Compound Slopes

by Max D. Coon, Coon & Associates Inc, Seattle, WA, USA,
Barbara A. Pizzano, Coon & Associates Inc, Seattle, WA, USA,



Document Type: Proceeding Paper

Part of: Civil Engineering in the Arctic Offshore

Abstract:

Many of the offshore drilling structures proposed for use in the Arctic have sides with multiple slopes. Sloping walls are used at the waterline to cause the ice sheet to fail in bending because bending failures of ice require smaller forces than crushing failures against vertical walls. Vertical upper walls are desirable in order to reduce the chance of ice rideup and to maximize the working surface with respect to the base diameter. The loads associated with the failure and rideup of ice sheets are investigated. Mechanisms by which the ice can clear around a change in slope on a structure are identified and the resulting additional global and local loads are determined for several examples.

Subject Headings: Ice loads | Offshore structures | Offshore drilling | Slopes | Failure loads | Failure analysis | Walls | Arctic

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