Combined Finite–Discrete Numerical Modeling of Runout of the Torgiovannetto di Assisi Rockslide in Central Italy
Publication: International Journal of Geomechanics
Volume 16, Issue 6
Abstract
The combined finite–discrete-element method (FDEM) is an advanced and relatively new numerical modeling technique that combines the features of the FEM with those of the discrete-element method. It simulates the transition of brittle geomaterials from continua to discontinua through fracture growth, coalescence, and propagation. With FDEM, it is possible to simulate landslides from triggering to runout and carry out landslide scenario analyses, the results of which can be successively adopted for cost-effective early warning systems. The purpose of this paper is to describe the results of the FDEM simulations of the triggering mechanism and the evolution scenarios of the Torgiovannetto di Assisi rockslide (central Italy), a depleted limestone quarry face where a rock wedge with an approximate volume of 182,000 m3 lies in limit equilibrium conditions, posing relevant issues in terms of civil protection. The results obtained demonstrate that the FDEM is able to realistically simulate the different phases of such a complex slope’s failure as well as to estimate both its runout distances and velocity, key features for landslide risk assessment, and management.
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Acknowledgments
The work described in this paper was funded by the Italian Ministry of Instruction, University and Research (MIUR) in the framework of the National Research Project PRIN 2009 titled “Integration of monitoring and numerical modelling techniques for early warning of large rockslides.” The project was carried out by the Department of Earth Sciences of the Università degli Studi di Firenze (national coordinator and responsible for the research unit: Prof. Nicola Casagli), the Department of Electrical and Information Engineering “Guglielmo Marconi” of the Università degli Studi di Bologna (responsible for the research unit: Prof. Andrea Giorgetti), and the Department of Structural, Building and Geotechnical Engineering of Politecnico di Torino (responsible for the research unit: Dr. Marco Barla).
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International Journal of Geomechanics
Volume 16 • Issue 6 • December 2016
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© 2016 American Society of Civil Engineers.
History
Received: Aug 6, 2014
Accepted: Dec 18, 2015
Published online: Feb 26, 2016
Discussion open until: Jul 26, 2016
Published in print: Dec 1, 2016
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