[en] From field observations it is possible to establish correlations between geological conditions and landslide occurrence. However, in general, it is difficult to assess the affect of individual factors on slope instability because of their mutual interaction. In addition, the dynamic effect of propagating seismic waves significantly increases the complexity of the slope stability problem. Wave diffraction, reflection and focusing effects are dependent on local geological conditions
and make it difficult to analyse dynamic sliding mechanisms using field observations alone. As a consequence, in order to examine the influence of various geological and
seismic factors on slope movements, it is often necessary to produce numerical models. This paper describes the results of such models as applied to two case studies in Kyrgyzstan:
the Ananevo rockslide, located in granite, and the Suusamyr debris slump-flow, situated within soft sediments (see Part A: Havenith et al., 2003). Discrete element modelling (UDEC),
adapted both to the discontinuous character of fractured rock and to the heterogeneity of layered mediums, was used. This permitted simulation of deformation mechanisms, including
seismically induced bending, block tilting, and slip. Particular attention was paid to the interaction between deformation mechanisms, site-specific amplification effects, and subsurface
structure.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Havenith, Hans-Balder ; Université de Liège - ULiège > Département de géologie > Géologie de l'environnement
Strom, A.
Calvetti, F.
Jongmans
Language :
English
Title :
Seismic triggering of landslides. Part B: Simulation of dynamic failure processes
Publication date :
2003
Journal title :
Natural Hazards and Earth System Sciences
ISSN :
1561-8633
eISSN :
1684-9981
Publisher :
European Geosciences Union, Katlenburg-Lindau, Germany
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