Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Landslide Modelling on Real Topography
Landslides are an important class of natural disaster that can lead to significant loss of life and significant property damage. Understanding when and where landslides may occur and under what circumstances is a key part of risk assessment and protective strategy formation. Understanding the path that any specific landslide may take and how far it will run from the initiation point are also important considerations. One class of large landslides is particularly dangerous because of the long distances that they can travel (more than several kilometres is quite possible) while exhibiting very low effective friction coefficients. Cleary and Campbell showed that this was possible (using a very simple two dimensional DEM model with periodic boundaries) because the shear in the landslide was restricted to a narrow layer at the base with most of the landslide mass travelling undisturbed over the top. This resulted in lower energy dissipation and the low effective friction that was required to explain this long run-out. Campbell et al. showed, using large scale DEM simulations of the mountain slope and valley flow (again in 2D), that the phenomena was more complex with the basal shear region being more blurred and continuous, but still restricted to the lower portions of the landslide. Here we extend the modelling to three dimensions and use some real topography to explore the effect of the additional realism on the DEM predictions of landslides.
Landslide Modelling on Real Topography
Landslides are an important class of natural disaster that can lead to significant loss of life and significant property damage. Understanding when and where landslides may occur and under what circumstances is a key part of risk assessment and protective strategy formation. Understanding the path that any specific landslide may take and how far it will run from the initiation point are also important considerations. One class of large landslides is particularly dangerous because of the long distances that they can travel (more than several kilometres is quite possible) while exhibiting very low effective friction coefficients. Cleary and Campbell showed that this was possible (using a very simple two dimensional DEM model with periodic boundaries) because the shear in the landslide was restricted to a narrow layer at the base with most of the landslide mass travelling undisturbed over the top. This resulted in lower energy dissipation and the low effective friction that was required to explain this long run-out. Campbell et al. showed, using large scale DEM simulations of the mountain slope and valley flow (again in 2D), that the phenomena was more complex with the basal shear region being more blurred and continuous, but still restricted to the lower portions of the landslide. Here we extend the modelling to three dimensions and use some real topography to explore the effect of the additional realism on the DEM predictions of landslides.
Landslide Modelling on Real Topography
Cleary, Paul W. (Autor:in)
Third International Conference on Discrete Element Methods ; 2002 ; Santa Fe, New Mexico, United States
Discrete Element Methods ; 355-360
27.08.2002
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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