Author(s): Denis Blanchet; Archie Churcher; John Fitzpatrick; Paulette Badra-Blanchet
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Keywords: No Keywords
Abstract: Ice loads on structures can be better estimated if the modes controlling the failure of the ice are well understood. This paper analyses ice failure mode data collected during 380 laboratory studies and more than 100 indentation tests conducted at Eagle lake near Calgary, Alberta, Canada. The analysis also includes 15 years of lighthouse and Cook Inlet platform interactions with first-year ice ridges and sheets and 7 years of wide arctic structure interactions with both first-year and multi-yea r ice ridges and sheets. This paper also describes several technical terms and introduces definitions of failure modes. A theoretical analysis of failure modes based on classical strength of materials methods is presented and a theoretical failure map is developed. This is followed by a detailed description of the ice failure modes seen in the laboratory and the development of a small scale ice failure map based on penetration rate. These two maps are compared and the map derived from the classica l strength of material theories is used to examine the full scale data. Some apparent anomalies are then discussed in detail and the paper ends with a summary of conclusions.
Year: 1988