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Revistas
Studia Geotechnica et Mechanica
Volumen 44 (2022): Edición 1 (March 2022)
Acceso abierto
Importance of seismic wave frequency in FEM-based dynamic stress and displacement calculations of the earth slope
Krzysztof Fuławka
Krzysztof Fuławka
,
Anna Kwietniak
Anna Kwietniak
,
Vera Lay
Vera Lay
y
Izabela Jaśkiewicz-Proć
Izabela Jaśkiewicz-Proć
| 09 feb 2022
Studia Geotechnica et Mechanica
Volumen 44 (2022): Edición 1 (March 2022)
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Article Category:
Original Study
Publicado en línea:
09 feb 2022
Páginas:
82 - 96
Recibido:
22 jun 2021
Aceptado:
16 dic 2021
DOI:
https://doi.org/10.2478/sgem-2022-0002
Palabras clave
Slope stability
,
Numerical analysis
,
Seismic load
,
Frequency analysis
© 2022 Krzysztof Fuławka et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.
Figure 1
Comparison of spectrograms for mining-induced high-energy tremors with energy of 1.9 × 109 J (left) and 1.2 × 107 J (right).
Figure 2
The dominant frequency content of LGCB mining-induced tremors in relation to their epicentral distance and energy (over 430 entries, vertical and horizontal components were studied).
Figure 3
The spectral amplitude characteristic of harmonic signals used in FEM dynamic analysis.
Figure 4
Geometry of slope used for numerical simulation.
Figure 5
Maximum element size in the dynamic model according to Kuhlemeyer and Lysmer law (blue line) and element size used for the purposes of this analysis (red bars).
Figure 6
Analysed variants of seismic load direction.
Figure 7
Matrix of numerical scenarios used for the presented research.
Figure 8
The calculated absolute values of displacement (top) and shear stress (down) changes at the base of the analysed slope depending on the used frequency.
Figure 9
The maximum calculated value of total displacement (top) and shear stress (bottom) at the base of the slope for all 180 cases.
Figure 10
The RSM surface map of the relation between dominant frequency, slope angle and displacement (left) and shear stress (right) for scenarios in which the direction of seismic load is the same as the direction of slope failure.
Figure 11
The RSM surface map of the relation between dominant frequency, slope angle and displacement (left) and shear stress (right) for scenarios in which the direction of seismic load is opposite to the direction of slope failure.
Material parameters used for numerical simulation.
Parameter
Unit weight
Young modulus
Poisson ratio
Tensile strength
Cohesion
Friction angle
Dilation angle
Unit
kN/m
3
kPa
-
kPa
kPa
°
°
Value
19
100,000
0.4
5
5
38
0