Effects of sample and boundary imperfections on calibration of monotonic and cyclic constitutive models in sand

Renseignements sur le financement
Natural Sciences and Engineering Research Council of Canada
  • Type de subvention: Programme de subventions d'engagement partenariat
  • Année: 2018/19
  • Financement total: $25,000
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Like many other fields of science and engineering, geotechnical engineers use laboratory testing to determine*the engineering properties of soils, so foundations, dams, tunnels and other structures can be designed and*constructed with, in, or on soils. Like all other laboratory tests, these tests have shortcomings, specifically in*the way boundaries of specimens interact with the soil and how this interaction affects the results.*However, all geotechnical engineering practice has assumed these tests are perfect in their boundary conditions.*Imperfections of specimens, such as non-uniformities, have been recognized but the solution has always been a*race towards creating ever more uniform specimens. Nobody knows how uniform is uniform enough, or has*quantified the effects of non-uniformity, or boundary conditions on the results.*This research will use analytical tools to estimate the effects of these non-perfections on the parameters*obtained from these tests, and will produce computational tools that account for the effects of these*imperfections on models that engineers create for design. The work is supported by RocScience, a Canadian*software company, giving them an advantage over other geotechnical engineering software companies that still*assume their input data come from perfect laboratory tests.