Author(s): G. W. Timco
Linked Author(s):
Keywords: No Keywords
Abstract: A test program has been performed in the laboratory to simulate the Hans Island experiments. A small transparent model was used to represent the Island. A small underwater video camera was set to photograph through the model. Floating sheets of freshwater ice impacted the model and the resulting loads were measured. The video camera gave information on the contact area, so the pressures could be determined. The results are compared to those from Hans Island, and other ice impact events on bridge piers. For the case where the kinetic energy of an impacting ice floe is limited, an analysis of the data shows that there is a strong functional dependence between the peak pressure and the time-tofailure and average stress-rate to failure. This dependence offers a realistic explanation of the so-called "size-effect" in ice. The analysis shows that the peak global pressure has the same rate sensitivity as the mechanical properties of ice.
Year: 1992