Investigation into MOGA for identifying parameters of a critical-state-based sand model and parameters correlation by factor analysis

Y.-F. Jin, Zhenyu Yin, S.-L. Shen, P.-Y. Hicher

Research output: Journal article publicationJournal articleAcademic researchpeer-review

40 Citations (Scopus)

Abstract

© 2015, Springer-Verlag Berlin Heidelberg.Adding refinement and accuracy to constitutive models of soil results in the introduction of complexities along with more model parameters. These parameters (such as hardening-/softening-, dilatancy-/contractancy-related parameters and critical state parameters) are usually not easily obtained in a straightforward way. How to identify these key parameters and estimate their correlations of advanced soil models is a particular issue for geotechnical engineering. This paper was aimed to investigate multi-objective genetic algorithms for identifying parameters of advanced sand models based on standard laboratory tests, followed by the correlation analysis of parameters. A critical-state-based sand model has been developed to simulate three triaxial compression tests performed on loose and dense Hostun sand. Two widely used genetic algorithms with two initialisation methods are examined. The performance of the two genetic algorithms is assessed by comparing their simulation performance using optimal parameters, the convergence speed and the distribution of solutions on the Pareto front. The optimal parameters can then be classified into two factors by their correlation relationship.
Original languageEnglish
Pages (from-to)1131-1145
Number of pages15
JournalActa Geotechnica
Volume11
Issue number5
DOIs
Publication statusPublished - 1 Oct 2016
Externally publishedYes

Keywords

  • Constitutive model
  • Genetic algorithms
  • Optimisation
  • Parameters analysis
  • Sand

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Earth and Planetary Sciences (miscellaneous)

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