Ice jamming occurs when ice fills the space between the legs of a multi-legged structure. The jammed ice often has sufficient strength and size not easily to clear away from the legs, and the legs and the jammed ice may then act as a single structural unit. There are many analogous phenomena in the flow of fragmented solids through gaps. Relationships between ice jamming, leg dimension and leg-leg spacing are discussed in ISO 19906. The choice of leg diameter and leg spacing is an important design decision that affects the commercial value of the structure. The primary objective of the present study is to develop a deeper understanding of ice jamming events, in order better to formulate design loads on a multi-leg structure.
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