Numerical modeling of stress-strain behavior of sand under cyclic loading

Created by W.Langdon from gp-bibliography.bib Revision:1.4549

  author =       "Habib Shahnazari and Yasser Dehnavi and 
                 Amir Hossein Alavi",
  title =        "Numerical modeling of stress-strain behavior of sand
                 under cyclic loading",
  journal =      "Engineering Geology",
  year =         "2010",
  volume =       "116",
  number =       "1-2",
  pages =        "53--72",
  month =        "27 " # oct,
  keywords =     "genetic algorithms, genetic programming, Cyclic stress
                 vs strain relationship, Formulation, Multi expression
                 programming, Damping ratio, Shear modulus",
  ISSN =         "0013-7952",
  URL =          "",
  DOI =          "doi:10.1016/j.enggeo.2010.07.007",
  size =         "20 pages",
  abstract =     "Analysis of soil response to cyclic loading is a
                 complex problem due to the participation of a large
                 number of loading conditions and physical properties.
                 In this study, a promising variant of genetic
                 programming (GP), namely multi expression programming
                 (MEP) is used to model stress-strain behaviour of sands
                 subjected to large amplitude regular cyclic loading.
                 Generalised MEP-based formulations are derived to
                 simulate hysteresis strain-stress curves. To construct
                 the hysteresis curves, functional relationships are
                 obtained between maximum shear stress at different
                 loading cycles and several influencing parameters. New
                 constitutive correlations are further developed for the
                 assessment of damping ratio and shear modulus. The
                 proposed correlations are established based on several
                 drained strain-controlled cyclic torsional simple shear
                 tests performed on samples of Toyoura sand. The
                 correlations take into account the effects of initial
                 effective confining pressure, initial relative density,
                 initial anisotropic stress state, strain amplitude, and
                 shear history. A subsequent parametric study is carried
                 out and the obtained trends are confirmed with the
                 experimental study results. For more validity
                 verification, the MEP-based correlations are applied to
                 simulate the stress-strain curves of a part of the
                 laboratory results beyond the training data domain. The
                 proposed models are effectively capable of capturing
                 the complex hysteresis behaviour of sandy soils under
                 cyclic loading conditions. The derived correlations are
                 particularly valuable for providing an analysis tool
                 accessible to practising engineers.",
  notes =        "College of Civil Engineering, Iran University of
                 Science & Technology, Tehran, Iran",

Genetic Programming entries for Habib Shahnazari Yasser Dehnavi A H Alavi