Author(s): Tuomo Karna; Erkki Jarvinen
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Keywords: No Keywords
Abstract: This paper addresses problems in evaluating the global ice load on a wide offshore structure. Emphasis is placed on the processes of dynamic unloading and extended strucrural swing-back displacement, which contribute to the spatial correlation of local ice forces. First, force and response records of indentation tests are considered to get detailed information on the physical phenomena involved. Second, a zonal model is developed for the unloading phase of the ice-structure interaction by considering relative displacement parameters and local forces involved in ice extrusion. Third, the new model of unloading is incorporated in a special-purpose computer program for dynamic soil-structure-ice interaction. Sample calculations are then performed to evaluate how the ice failure phenomena considered contribute 10 the global ice force on a wide offshore structure.
Year: 1994