A PRELIMINARY ANALYSIS OF MOLIKPAQ LOCAL ICE PRESSURES AND ICE FORCES AT AMAULIGAK I-65

摘要

The Amauligak I-65 deployment of the Molikpaq for the winter of 1985/86 provides a good source of local pressure data and a basis for estimating global loads on a wide structure. Data including Medof panel pressures and hourly ice conditions at Molikpaq have been extracted from the "Catalogue of Local Ice Pressures" (CLIP) database. Pressures as high as 10 MPa were experienced on small areas; on areas greater than 3 m~2, peak pressures are less than 2 MPa. A method is presented for the calculation of peak loads on the north and east faces, using local ice loads to obtain estimates of global face loads. Extreme values of global ice loads were of the order of 200 MN, with most ice forces during the season being much lower. Thicker ice generally corresponds to higher ice loads on both the east and north faces. However for the thickest ice, lower than expected forces were calculated for the faces of the structure. This could be due to less ice drift (and lower exposure) for very thick ice.