Author(s): Chris Petrich; Na Saether; Lennart Fransson; Bjornar Sand; Bard Arntsen
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Keywords: No Keywords
Abstract: Design standards for hydropower dams and other reservoir dams require ice loads to be considered. Ice stress measurements were performed in a small reservoir near Narvik, Norway in 2012/13 and 2013/14 in an effort to identify the signature of thermal ice stresses and distinguish them from mechanical stresses due, for example, to bending. Stresses observed could be related to temperature changes in the ice and indicated the combined action of thermal expansion and secondary creep. Both compressive and, to a limited extent, tensile stresses were recorded during warming and cooling periods, respectively. Stresses tended to be lowest at the periphery of the dam in 2012/13. Several events of mechanical loading were observed in Season 2013/14. It is concluded that current knowledge of ice loads in small reservoirs is limited and that several seasons of data are required to obtain an overview of processes, modes and magnitudes of loads.
Year: 2014