Seismic stability analysis of rock slopes using pseudodynamic approach
Seismic stability analysis of rock slopes using pseudodynamic approach
This paper proposes a semi-analytical framework based on a new pseudodynamic approach for evaluating the seismic stability of rock slopes obeying modified Hoek-Brown criterion. The analysis was conducted by adopting kinematically admissible rotational log-spiral failure mechanism within the framework of kinematic approach of limit analysis. Considering the rock mass as an equivalent viscoelastic medium, one-dimensional (1D) wave propagation theory is used to describe the nonlinear and time dependent seismic acceleration distribution within the rock mass by considering its dynamic properties. In the present analysis, the computation of the rate of total internal energy dissipation along the log-spiral failure surface was based on a generalized tangential line technique, which helps solving the given nonlinear problem in a generic way. Least upper bound solutions of the seismic stability factor of rock slopes are sought by optimization for a wide range of parameters and this study highlights the importance of different dynamic parameters on the stability of rock slopes.
R. Ganesh; Jagdish Prasad Sahoo
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
7. Dams, embankments and slopes
https://doi.org/10.53243/NUMGE2023-221
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