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Gravity hazards are a major concern to those living in mountainous areas. To protect infrastructure and human life in these areas, engineers require numerical tools for trajectory analysis, for application from fragmental rockfalls to large-scale avalanches or landslides.
This book explores state-of-the-art methods to model the propagation (flows and stops) of masses, using the discrete element method (DEM) to study the evolution of kinetics during an event. Taking into account the shape of the blocks and the topology of the terrain provides an explicit and sophisticated consideration of geometries, eliminating the need for stochastic inputs to rockfall simulations. This method is validated experimentally, before the authors apply it to real case studies. The book ends with an introduction to and comparison with the material point method (MPM), a new and promising approach able to bridge the gap between cases dominated by discreteness and those involving a very large number of elements.
Engineering consulting firms, researchers and students should find the approaches outlined in this book useful, whether designing prevention and protection systems for gravity hazards, or exploring new ways to model gravity hazards.
- Covers conventional methods used to study gravitational phenomena using empirical parameters
- Presents a new numerical tool taking account of the physical phenomenon (friction, dissipation, realistic block shapes) and a methodology for parameter calibration and the achievement of numerical simulations
- Applies the numerical model to real cases with a critical analysis of its applicability in the field of engineering
- Emphasizes the discrete element method (DEM)
Consulting firms that need to design systems of prevention and protection against rock avalanches. Students and researchers interested in the modeling of gravitational phenomena. Scientists and students interested in numerical method, users of numerical models dedicated to environmental hazards, practitioners and stakeholders
- 1: Computational Methods
- 1.1 Trajectory analysis
- 1.2 Discrete element method
- 1.3 Material point method
- 2: DEM Applied to Laboratory Experiments
- 2.1 Description of the experiments
- 2.2 Definition and assessment of the contact parameters
- 2.3 Simulation versus experiment results
- 2.4 Further clues handled by numerical results
- 2.5 Concluding remarks
- 3: Parameters that May Affect the Flow
- 3.1 Constituting blocks
- 3.2 Contact parameters
- 3.3 Propagation area
- 3.4 Concluding remarks
- 4: Application to Actual Rockfalls
- 4.1 Retro analysis of a natural rockfall implying a few blocks
- 4.2 Numerical modeling of an artificially triggered rockfall
- 4.3 Forecast of a rockfall propagation toward a protective structure
- 5: From Discrete to Continuum Modeling
- 5.1 Geometries and parameters used
- 5.2 Analysis
- 5.3 Concluding remarks
- No. of pages:
- © ISTE Press - Elsevier 2016
- 23rd September 2016
- ISTE Press - Elsevier
- Hardcover ISBN:
- eBook ISBN:
Vincent Richefeu is a researcher at University Grenoble Alpes in France, in the 3SR group. He has been working within the framework of a European project related to Medium and Small Size rockfall hazard Assessment (MASSA) since 2009. His current research interests focus on the modeling of granular media by introducing more physics at low scales.
Associate Professor, Laboratory 3SR, University of Grenoble, Alpes, France
Pascal Villard is a researcher at University Grenoble Alpes in France, in the 3SR group. He has been working within the framework of a European project related to Medium and Small Size rockfall hazard Assessment (MASSA) since 2009. His current research interests focus on large-scale structures made of geo-materials.
Professor, Laboratory 3SR, University of Grenoble, Alpes, France