| Title | Seismic slope displacement of tailings dam: a comparative study between Modified Newmark and Mohr-Coulomb Models |
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| Author | Mircevska, V; Nastev, M ; Nanevska, A |
| Source | Journal of Earthquake Engineering 2021 p. 1-23, https://doi.org/10.1080/13632469.2021.1965053 |
| Year | 2021 |
| Alt Series | Natural Resources Canada, Contribution Series 20210499 |
| Publisher | Taylor & Francis Online |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| File format | pdf |
| Program | Public Safety
Geoscience Rapid Risk Assessment |
| Released | 2021 08 18 |
| Abstract | Modified Newmark method is proposed including the equivalent seismic loading and critical acceleration dependant on the dynamically exerted plastic yielding and tension cutoff effects along the base of
the sliding mass. The fully nonlinear FE analysis is based on elasto-plastic Mohr-Coulomb material model. The proposed algorithm was validated in an example of 72 m high tailings dam. The Newmark permanent displacements were compared with the average
plastic deformations resulting from the nonlinear Mohr-Coulomb model. The comparison shows satisfactory agreement for low to moderate nonlinear slope behavior. For deep nonlinearity, the modified Newmark method can be used as a decision-making tool
only. |
| Summary | (Plain Language Summary, not published)
A modified Newmark method is proposed for analysis of seismic slope displacement. It includes equivalent seismic loading and critical acceleration
dependent on the dynamically exerted plastic yielding and tension cutoff effects along the base of the sliding mass. The fully nonlinear finite element analysis is based on the elasto-plastic Mohr-Coulomb material model. The proposed algorithm was
validated in a case study of 72 m high tailings dam. The obtained Newmark permanent displacements were compared with the average plastic deformations resulting from the nonlinear Mohr-Coulomb model. Results show satisfactory agreement for low to
moderate nonlinear slope behavior. In the case of deep nonlinearity and large displacements, the modified Newmark method can be used as a decision-making tool only. |
| GEOSCAN ID | 329359 |
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