Author(s): Aleksey Marchenko; E. Karulin; M. Karulina; A. Sakharov; P. Chistyakov; D. Sodhi; A. Sliusarenko
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Abstract: Full-scale tests were conducted to determine compressive strength of in-situ ice beams by loading them horizontally over their entire thickness by a hydraulically operated loading platen with a capacity of exerting a maximum force of 60 tons (0.6 MN). The force and displacement signals from two hydraulic cylinders during ice compression were monitored and recorded at a sampling rate of 50 Hz. The tests were performed on sea ice in Spitsbergen region since 2013. The ice thickness during the tests ranged from 30 to 70 cm. Sea ice temperature and salinity were measured during and after each test. Small-scale, compressive-strength tests were performed on horizontal ice cores taken from the same ice. The ice strength from small-scale tests agrees reasonably well with existing data in the literature on ice strength. We found that the mean values of small-scale compressive strength and the full-scale compressive strength are in the same range of values for similar values of temperature and salinity averaged over the ice thickness. Uniaxial compressive strength obtained from full-scale tests with fixed-ends beams is greater by about two times the strength found from full-scale tests with short cantilever beams. Analysis of thin sections of ice is performed to analyze changes of the ice granular structure after the tests.
Year: 2018