Rubble Height Prediction Based on a Rubble Mass Conservation Model

The ice load resulting from level ice moving against a sloping structure can be determined using ISO 19906 (2010). In the design equations, the rubble height has a significant influence on the ice load prediction. In this presentation, a rubble mass conservation model is proposed to provide guidance on the rubble height for upward conical structures. The proposed rubble mass conservation model considers the rubble mass supply and clearance rates into and out of an identified region surrounding the conical structure. Some simplifying assumptions are adopted such that the rubble mass supply and clearance rates can be written in terms of the structure waterline width and ice feature properties. Considering a fully developed rubble at steady state, the balance between rubble mass supply and clearance rates thus enables the determination of the rubble height. The model is finally benchmarked against field data from the Confederation Bridge.


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  • Accession Number: 01745185
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 6 2020 12:42PM