The Calculation of Ice Forces on Arctic Structures

by W. Mark Bohon, ARCO Oil & Gas Co, Dallas, TX, USA,
Jean S. Weingarten, ARCO Oil & Gas Co, Dallas, TX, USA,



Document Type: Proceeding Paper

Part of: Civil Engineering in the Arctic Offshore

Abstract:

Results of tests conducted to determine the relationship between uniaxial compressive strength of ice and crushing force are presented. A plot of normalized uniaxial compressive strength versus strain rate is given which can be used to predict the uniaxial compressive strength of any ice, at any strain rate, from a single strength measurement. The traditional definition of characteristic strain rate for an ice-structure interaction is shown to be incomplete; the complete definition is given. Using this definition, the dependence of indentation force on uniaxial ice strength is given by an equation of the same form as the Korzhavin equation; indentation factor and contact factor are quantified. The results, together with loading considerations, indicate that, for large structures, ice forces are significantly lower than previously estimated. Field data and observations support the results.

Subject Headings: Compressive strength | Ice | Offshore structures | Terminology and definition | Structural strength | Strain rates | Strain | Arctic

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