An Equivalent Continuum Approach to Efficiently Model the Response of Steel Wire Meshes to Rockfall Impacts

Mentani, Alessio; Govoni, Laura; Giacomini, A.; Gottardi, Guido; Buzzi, Olivier

doi:10.1007/s00603-018-1490-5

Cited by 18 publications

(20 citation statements)

References 24 publications

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“…This assumption simplifies the structural modelling and allows the use of two-dimensional finite elements. Publications such as [1,3] suggest a shell element to be used. While the advantages are clarified in the publication cited, this would mean an overhead for the underlying experiment.…”

Section: Structural Modelingmentioning

confidence: 99%

“…In contrast to preceding works, such as [1,2], this work proposes to model arbitrary objects with the help of discrete spherical element clusters. The advantage over standard finite element discretized objects is the simplified contact detection between arbitrary boundary objects and single spheres contained in the cluster [21].…”

Section: Impacting Objectmentioning

confidence: 99%

“…Natural disasters, such as rockfall events, pose a serious threat to people, especially in mountainous areas. Several works, such as [1][2][3][4], already describe how to simulate these events and discuss the appropriate modelling of protection structures. While [5,6] use the coupling of the DEM and the FEM to analyse the interaction of rocks and the ground surface, [7] discusses different design strategies for flexible rockfall barriers.…”

Section: Introductionmentioning

confidence: 99%

“…Current state-of-the-art publications, such as [1,3], use the FEM to model the geometry of the test objects. By using geometric objects such as surfaces and lines, the use of FEM in this case leads to complex and costly contact algorithms [16].…”

Section: Introductionmentioning

confidence: 99%

“…In contrast to standard finite element discretization of the impacting objects as provided in previous works, e.g. [1][2][3][4], the DEM in KRATOS uses clusters of single spheres to represent any desired, arbitrary shape. This allows a simple contact search but also raises the question how these clusters have to be defined to achieve adequate results.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Influence of DE-cluster refinement on numerical analysis of rockfall experiments

Sautter

Hofmann

Wendeler³

et al. 2021

Comp. Part. Mech.

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A numerical analysis is validated against a Swiss Federal Commission for Technology and Innovation (CTI)—frame impact experiment conducted by the Swiss Company Geobrugg. The discrete element method is used to simulate the impacting object, while the highly nonlinear structural response is analysed with the finite element method. Both methods are coupled within an open-source multi-physics research code to exchange data and simulate the interaction. The successful practical application of the coupling algorithm is demonstrated with this work, as the numerical results show good agreement with the experimental results. Within this paper the main focus is the appropriate modelling of the impacting objects, which heavily influences the simulation results, while a simplified structural model allows a correct assessment of the global deformation behaviour and reaction forces.

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Section: Structural Modelingmentioning

confidence: 99%

Section: Impacting Objectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of DE-cluster refinement on numerical analysis of rockfall experiments

Sautter

Hofmann

Wendeler³

et al. 2021

Comp. Part. Mech.

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Discrete Element Modeling of Compound Rockfall Fence Nets

Previtali

Ciantia

Spadea

et al. 2021

Challenges and Innovations in Geomechanics

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Compound mesh panels are structures in which two different nets geometries are employed: a main mesh that provides the bearing capacity and a weaker mesh with a thin sieve size to catch smaller blocks that can pass through otherwise. Typically, only the effect of the main mesh is investigated, and the weaker mesh is considered to provide negligible structural resistance. In this paper, after a calibration procedure, numerical simulations of quasi-static punch tests and a dynamic block impact on a composite double-twist and strand rope mesh are performed. The results show that, under dynamic conditions, the presence of the finer mesh lowers the peak force acting on the main mesh. This effect is not found under quasi-static conditions and has important repercussions on the overall structural resistance as the energy dissipation mechanism reduces the stress on the mesh fence posts.

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Toward a Generic Computational Approach for Flexible Rockfall Barrier Modeling

et al. 2019

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Flexible rockfall barriers are protection structures used to mitigate rockfall hazards in mountainous areas. The complex nonlinear mechanical behavior of these structures under impacts requires powerful modeling tools to perform structural analysis. In this article, a generic computational approach to rockfall barriers analysis is introduced. First, the generic formulation and numerical implementation in the GENEROCK software are detailed. Then, two barrier models are considered and validated against experimental full-scale tests on two different technologies. This numerical investigation permits insightful numerical investigation of the barriers' behavior. Exploratory numerical simulations are eventually performed to highlight the strengths and generality of the proposed approach. The influence of the curtain effect modeling in simulation results is presented. The effects of repeated impacts on rockfall barriers are investigated and present new insight into barrier behavior and management practices. Stochastic modeling methods are also used to study the propagation of uncertainty and variability of the structure itself in its dynamic response.

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An Equivalent Continuum Approach to Efficiently Model the Response of Steel Wire Meshes to Rockfall Impacts

Cited by 18 publications

References 24 publications

Influence of DE-cluster refinement on numerical analysis of rockfall experiments

Influence of DE-cluster refinement on numerical analysis of rockfall experiments

Discrete Element Modeling of Compound Rockfall Fence Nets

Toward a Generic Computational Approach for Flexible Rockfall Barrier Modeling

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