Effect of Analysis Method on Computed Seismic Deformation for an Embankment Dam
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Multiple methods of analysis are used to evaluate seismic deformations for embankment dams.

These methods range from empirical correlations, to sliding block analyses, to fully nonlinear dynamic analyses. Various factors may influence the analysis method selected including project complexity, data availability, analyst experience, time, and budget. When the resulting deformations are used in a seismic risk assessment, there are additional considerations including the applicability of the method with high-intensity ground motions, and the ability to assess the dam safety implications for the deformations calculated from simplified methods. This paper explores the effect of analysis method on the calculated seismic deformations for a hypothetical embankment dam using two methods of analysis, (1) decoupled sliding block analyses using acceleration time histories from two-dimensional equivalent-linear dynamic response analyses and (2) nonlinear dynamic numerical analyses using the Mohr-Coulomb constitutive model. The results of the analyses are compared across a range of ground motion intensities and implications for practice are discussed.

Publication Summary

  • Geosyntec Authors: Kathleen Darby, Christie Hale, Xiaoyue Wang, Tiffany Adams, Lelio Mejia
  • All Authors: Kathleen Darby, Christie Hale, Xiaoyue Wang, Tiffany Adams, Lelio Mejia
  • Title: United States Society on Dams (USSD) 2022 Annual Conference
  • Event or Publication: Event
  • Practice Areas: Dams; Dam Safety
  • Citation: United States Society on Dams (USSD) 2022 Annual Conference and Exhibition at the Town and Country Resort in San Diego, California on April 11 through 14, 2022.
  • Date: Wednesday, April 13 at 1:30 p.m. PDT
  • Location: San Diego, California
  • Publication Type: Platform Presentation