Author(s): M. M. Winkler R. P. Nordgren
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Keywords: No Keywords
Abstract: A model is presented for the calculation of the force on a conical structure during the ride-up of an ice ridge. The ridge is modeled as an elastic beam in point contact with the rigid structure. The ridge rotates through large angles about its centerline as it is pushed up the cone by the surrounding ice. A plane analysis of equilibrium determines distributed forces acting on the ridge at specific stages of the ride-up process. Flexural failure of the ridge is considered using beam theory. The force on the structure depends on ridge size and reaches a maximum at a particular rotation angle during the ride-up. A critical ridge length is determined which maximizes the structural force for a given flexural strength. Results show that critical ridge lengths on the order of 200-400 feet produce the maximum force on the structure. These short ridges are capable of loading the structure above the waterline.
Year: 1986