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Modeling of Ice Rubble on the Sloping Structure

Author(s): L. Li; W. Zhao; K. N. Shkhinek

Linked Author(s): Wei Zhao, Longqiang Li

Keywords: No Keywords

Abstract: In cold environment, ice rubble can encroach on gravel islands and other structures, and potentially damage the facilities contained thereon. Ice movement events can drive the ice onto a structure, riding directly up a sloping face or existing rubble accumulation, or piling up and tumbling onto the structure. For large footprint structures, design considerations include the necessary width of encroachment or buffer zones, island freeboard requirements and the need for protective walls. For drilling and other smaller structures, the height of protective walls and ice deflectors is an important design concern. The height of the protective walls and the ice deflectors is related to the height of rubble piles on wide sloping structures. A very important factor in both Croasdale’s and Ralston’s solutions is the height of rubble piles on wide sloping structures. In order to determine the height of rubble piles on sloping surface, this paper proposes a theoretical model of ice rubble on the sloping surface based on theory of a semi-infinite elastic beam on an elastic foundation. The failure model of ice beam, together with the maximum height of rubble piles are analyzed in detail in the process of the interaction between ice and the sloping structure. The maximum height of rubble piles that obtained by the proposed model is compared with those from finite element analysis and empirical formula and the results demonstrate the proposed model. Furthermore, the effect of the angel of the sloping structure on the height of the ice rubble is determined based on the proposed model.


Year: 2016

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