Importance of seismic wave frequency in FEM-based dynamic stress and displacement calculations of the earth slope

Studia Geotechnica et Mechanica

Jaśkiewicz-Proć Izabela¹  Kwietniak Anna²  Fuławka Krzysztof³  Lay Vera⁴ 

[1] Bundesanstalt für Materialforschung und prüfung, Unter den Eichen 87, 12203Berlin, Germany;AGH University of Science and Technology, Kraków, Faculty of Geology, Geophysics and Environmental Protection, Department of Geophysics, Adama Mickiewicza 30, 30-059Cracow, Poland;KGHM CUPRUM Ltd. Research and Development Centre, 2-8 Sikorskiego Street, 53-659Wrocław, Poland;Technical University Bergakademie Freiberg, Institute of Geophysics and Geoinformatics, Gustav-Zeuner-Str. 12, 09599Freiberg, Germany;

关键词: slope stability;    numerical analysis;    seismic load;    frequency analysis;   

DOI  :  10.2478/sgem-2022-0002

来源: DOAJ

【 摘 要 】

Reliable assessment of earthen dams’ stability and tailing storage facilities widely used in the mining industry is challenging, particularly under seismic load conditions. In this paper, we propose to take into account the effect of the dominant frequency of seismic load on the stability assessment of tailing/earthen dams. The calculations are performed by finite element modelling (FEM) with the Mohr–Coulomb failure criteria. To separate the frequency content from other dynamic parameters describing the seismic wave, synthetic waveforms with identical amplitude and attenuation characteristics, but differing spectral characteristics have been used. The analysis has been performed for three different slope angles and two scenarios of seismic wave propagation. Consequently, the changes of total displacement and shear stresses depending on the frequencies have been determined and clearly show that lower frequencies cause higher stress levels and displacement. Finally, the response surface methodology has been applied to determine how different parameters affect the slope stability under dynamic load conditions. Overall, this study is a first step to improve the existing methods to assess slope stability when considering seismic load.

【 授权许可】

Unknown