Application of an elastoplastic spectral-element method to 3D slope stability analysis

Hom Nath Gharti, Dimitri Komatitsch, Volker Oye, Roland Martin, Jeroen Tromp

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

We implement a spectral-element method for 3D time-independent elastoplastic problems in geomechanics. As a first application, we use the method for slope stability analyses ranging from small to large scales. The implementation employs an element-by-element preconditioned conjugate-gradient solver for efficient storage. The program accommodates material heterogeneity and complex topography. Either simple or complex water table profiles may be used to assess effects of hydrostatic pressure. Both surface loading and pseudostatic seismic loading are implemented. For elastoplastic behavior of slopes to be simulated, a Mohr-Coulomb yield criterion is employed using an initial strain method (i.e., a viscoplastic algorithm). For large-scale problems, the software is parallelized on the basis of domain decomposition using Message Passing Interface. Strong-scaling measurements demonstrate that the parallelized software performs efficiently. We validate our spectral-element results against several other methods and apply the technique to simulate failure of an earthen embankment and a mountain slope.

Original languageEnglish (US)
Pages (from-to)1-26
Number of pages26
JournalInternational Journal for Numerical Methods in Engineering
Volume91
Issue number1
DOIs
StatePublished - Jul 6 2012

All Science Journal Classification (ASJC) codes

  • Numerical Analysis
  • Engineering(all)
  • Applied Mathematics

Keywords

  • 3D slope stability
  • Elastoplasticity
  • Finite-element method
  • Parallel processing
  • Pseudostatic seismic loading
  • Spectral-element method

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