Author(s): Basile Bonnemaire; Morten Bjerkas
Linked Author(s):
Keywords: No Keywords
Abstract: This paper addresses the interaction between first-year ice ridges and an instrumented lighthouse in brackish water. Altogether 33 interactions with relatively small ice ridges were selected and studied in detail. The deepest keel was 3.34 m and the highest sail 1.65 m. From 12 of the 33 selected ridges, the thickness of the consolidated layer was predicted based on loads on a vertically segmented panel. A ridge factor representing the thickness ratio between the consolidated layer and the parent ice sheet is found to be on average 1.45. Ice ridge – structure interaction is a complex process; it presents several failure modes such as crushing, bending, splitting and failure on rubble wedges. Snow cover does not seem to influence the ice loads significantly. Crushing failure seems to give the highest loads during interaction with ice ridges. Rubble wedge buildups tend to save the structure from the highest ice loads.
Year: 2004