3D SPH numerical simulation of the wave generated by the Vajont rockslide

Vacondio, Renato; Mignosa, Paolo; Pagani, Samuele

doi:10.1016/j.advwatres.2013.06.009

Cited by 97 publications

(66 citation statements)

References 18 publications

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“…A complete analysis of the Vajont rockslide should consider the geological settings of the slope and the 3D motion of the water waves (e.g. see the work by Ward and Day 2011;Vacondio et al 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Field investigations by Hendron and Patton (Hendron and Patton 1987) revealed that multiple clay layers with thickness between 0.5 and 10 cm exist close or along the sliding surface. Based on the geologic information, the strength characteristics and the available monitoring data, the rockslide has been studied by numerous investigators to reveal the controlling geologic constraints and the internal deformation (Belloni and Stefani 1987;Boon et al 1963;Paronuzzi et al 2013;Vacondio et al 2013;Chowdhury 1987;Corbyn 1982;Crosta and Agliardi 2003;Selli and Trevisan 1964;Rossi et al 1963;Müller-Salzburg 1964, 1987a. 2D analytical and numerical backcalculations estimated that the critical sliding friction angle is within a range of [17°, 23°] (Crosta et al 2007;Corbyn 1982;Mencl 1966;Nonveiller 1987), which is significantly higher than the measured residual friction angle of wet clay layer at the sliding surface [6°, 10°] (Hendron and Patton 1987).…”

Section: Introductionmentioning

confidence: 99%

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Rockslide and Impulse Wave Modelling in the Vajont Reservoir by DEM-CFD Analyses

2015

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This paper investigates the generation of hydrodynamic water waves due to rockslides plunging into a water reservoir. Quasi-3D DEM analyses in plane strain by a coupled DEM-CFD code are adopted to simulate the rockslide from its onset to the impact with the still water and the subsequent generation of the wave. The employed numerical tools and upscaling of hydraulic properties allow predicting a physical response in broad agreement with the observations notwithstanding the assumptions and characteristics of the adopted methods. The results obtained by the DEM-CFD coupled approach are compared to those published in the literature and those presented by Crosta et al. (Landslide spreading, impulse waves and modelling of the Vajont rockslide. Rock mechanics, 2014) in a companion paper obtained through an ALE-FEM method. Analyses performed along two cross sections are representative of the limit conditions of the eastern and western slope sectors. The max rockslide average velocity and the water wave velocity reach ca. 22 and 20 m/s, respectively. The maximum computed run up amounts to ca. 120 and 170 m for the eastern and western lobe cross sections, respectively. These values are reasonably similar to those recorded during the event (i.e. ca. 130 and 190 m, respectively). Therefore, the overall study lays out a possible DEM-CFD framework for the modelling of the generation of the hydrodynamic wave due to the impact of a rapid moving rockslide or rock-debris avalanche.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rockslide and Impulse Wave Modelling in the Vajont Reservoir by DEM-CFD Analyses

2015

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“…The previously described numerical technique is here used for the simulation of the complete sequence of events: landslide runout, interaction with the water reservoir and generation of the overtopping wave. Other numerical simulations of this tragedy have been reported in [14,15]. Table 2 summarizes the parameters used in the simulation [14].…”

Section: Vajont Landslidementioning

confidence: 99%

A Lagrangian Pfem Approach to the Numerical Simulation of 3d Large Scale Landslides Impinging in Water Reservoirs

Cremonesi¹,

Ferri²,

Perego³

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Abstract. Landslides are exceptional natural hazards that can generate extensive damage to structures and infrastructures causing a large number of casualties. A particularly critical condition occurs when the landslide impinges in water reservoirs generating high waves. This work proposes a numerical tool to simulate the macroscopic behavior of a propagating landslide. The Particle Finite Element Method (PFEM) is here used and adapted to the specific case of landslide runout. The Lagrangian Navier-Stokes equations of incompressible fluids are used to describe the macroscopic landslide behavior. A rigid-visco-plastic law with a pressure dependent threshold, typical of a non-Newtonian, Bingham-like fluid, is used to characterize the constitutive behavior of the flowing material. Special attention is devoted to the definition of ad-hoc pressure-dependent slip boundary conditions at the interface between the flowing mass and the basal surface to better represent the real landslide-slope interaction. The proposed approach has been validated against numerical benchmarks and small scale experimental tests, showing a good agreement with the physical measurements. Real case scenarios have also been considered. 3D geometries of critical sites, where landslides have occurred, have been reconstructed allowing for the simulation of large scale real landslide runouts. Results are compared with post-event images and measurements, showing the accuracy and the capability of the method. 608

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“…No fixed connection between particles or meshes exists, avoiding the inaccuracy from the distorted mesh when dealing with a large deformation and post failure movement of the landslides ( Huang et al, 2009 ). The SPH method has already been used for simulating waves generated by landslides by simplifying the landslide in to a rigid body ( Shi et al, 2015 ;Vacondio et al, 2013 ) or a nonNewtonian fluid model ( Ataie-Ashtiani and Shobeyri, 2008 ;Capone et al, 2010 ). Because of its Lagrangian and mesh free characteristics, the SPH method avoids the issue of the simplified treatment of materials' interface in the Euler mesh.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of landslide-generated waves using a soil–water coupling smoothed particle hydrodynamics model

Shi

et al. 2016

Advances in Water Resources

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3D SPH numerical simulation of the wave generated by the Vajont rockslide

Cited by 97 publications

References 18 publications

Rockslide and Impulse Wave Modelling in the Vajont Reservoir by DEM-CFD Analyses

Rockslide and Impulse Wave Modelling in the Vajont Reservoir by DEM-CFD Analyses

A Lagrangian Pfem Approach to the Numerical Simulation of 3d Large Scale Landslides Impinging in Water Reservoirs

Numerical simulation of landslide-generated waves using a soil–water coupling smoothed particle hydrodynamics model

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