Particle-based modelling of cortical meshes for soil retaining applications

Gabrieli, Fabio; Pol, Antonio; Thoeni, Klaus; Mazzon, Nicola

doi:10.1201/9781351003629-48

Cited by 7 publications

(8 citation statements)

References 1 publication

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“…This difference determines an incorrect characterization of the mesh mechanical behaviour, which, if not duly considered, may negatively reflect on the performance of the mesh system. While the implementation of an ''in situ'' test set-up may be difficult to achieve (an example of large-scale test can be found in [5]), the use of a numerical approach allows this problem to be overcome [22,37,41].…”

Section: Effect Of the Size Of The Punching Elementmentioning

confidence: 99%

“…On one hand, the realization of real-scale experiments [4,5] is complex and extremely costly. On the other hand, the laboratory tests that are currently used to evaluate the performance of the mesh do not correctly reproduce conditions in the field [5,22,24,41]. In the laboratory characterization, the mesh panel is generally fixed to a rigid frame along its outer boundary, instead in the field the mesh is only locally fixed by means of anchor plates.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the impact of a dry granular flow on a flexible barrier was analysed in [1,2], while the impact of a debris flow (using a CFD-DEM coupled scheme) was considered in [31]. Only very recently, was the DEM applied to secured drapery systems [22,34,41,42]. This is also the focus of the present work.…”

Section: Introductionmentioning

confidence: 99%

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Discrete element analysis of the punching behaviour of a secured drapery system: from laboratory characterization to idealized in situ conditions

2021

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In this work, the mechanical response of a steel wire mesh panel against a punching load is studied starting from laboratory test conditions and extending the results to field applications. Wire meshes anchored with bolts and steel plates are extensively used in rockfall protection and slope stabilization. Their performances are evaluated through laboratory tests, but the mechanical constraints, the geometry and the loading conditions may strongly differ from the in situ conditions leading to incorrect estimations of the strength of the mesh. In this work, the discrete element method is used to simulate a wire mesh. After validation of the numerical mesh model against experimental data, the punching behaviour of an anchored mesh panel is investigated in order to obtain a more realistic characterization of the mesh mechanical response in field conditions. The dimension of the punching element, its position, the anchor plate size and the anchor spacing are varied, providing analytical relationships able to predict the panel response in different loading conditions. Furthermore, the mesh panel aspect ratio is analysed showing the existence of an optimal value. The results of this study can provide useful information to practitioners for designing secured drapery systems, as well as for the assessment of their safety conditions.

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Section: Effect Of the Size Of The Punching Elementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Discrete element analysis of the punching behaviour of a secured drapery system: from laboratory characterization to idealized in situ conditions

2021

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“…From a numerical perspective, both the finite element method (FEM) [20][21][22][23][24][25] and the discrete element method (DEM) [26][27][28][29][30] have been adopted to simulate mesh structures. Focusing on anchored drapery systems only, the DEM has been recently used to analyze its interaction with a single rigid body (i.e., rock block) [18,19,[31][32][33][34] or with an unstable granular layer [18,[35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Towards a Hybrid Design Approach of Anchored Drapery Systems

et al. 2023

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Anchored drapery meshes represent a worldwide adopted protective solution against rockfall. The mechanical performance of a wire mesh is evaluated through laboratory procedures in which the boundary conditions strongly differ from the ones typical of field applications. This shows that the laboratory characterization is, in general, not representative of the field behavior. In this work, referring to a double-twisted wire mesh, a simple approach allowing the extension of the laboratory characteristic values to field conditions is proposed. The approach is based on the definition of analytical relations for evaluating the effects of both the mesh’s system geometry and the loading condition on the force–displacement response. These relations are derived from previously calibrated laboratory tests and are extended to different configurations on the basis of a large number of discrete element simulations. A master curve allowing the prediction of the entire force–displacement response of a general configuration of the drapery system is then defined. The results of this study can provide useful information for designing anchored drapery systems and can be easily associated with standard limit equilibrium calculations to move toward a hybrid design approach that couples forces with mesh deformations.

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“…As a result of the increasing usage of this system due to its low cost and ease of installation, recent studies have aimed to investigate the most appropriate design method [8][9][10], either with numerical methods [11][12][13][14] or with real-scale tests [15][16][17][18]. The scientific literature also includes numerical studies on the net component only [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Reinforced Drapery Meshes: A Design Method Accounting for Retaining Ropes Contribution

Marchelli

Giacchetti²

2021

Applied Sciences

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Reinforced drapery meshes, both secured and pinned, constitute a compelling solution for rockfall risk mitigation on rock slopes facing structures and infrastructures. They consist of steel wire mesh panels combined with a systematic anchoring pattern. In secured drapery systems, the anchors are connected to each other and to the net through ropes. The system prevents both global instability of the surficial part of the slope thanks to the anchors and local instability by confining small detached fragments in delimited mesh sections. The mesh is generally designed with mechanical resistance derived from the puncturing force–displacement behavior observed during a standardized laboratory test. Despite the fact that a codified design method has not yet been defined, the mesh is generally verified without considering the presence of the ropes. In the present work, an enhanced design method is introduced that accounts for retaining ropes, with the aim of achieving a confining effect similar to the constraints adopted in laboratory tests. In addition, the rope pattern enables the consideration of portions of mesh smaller than pinned drapery systems. In the proposed method, rope elongation is limited such that failure of the mesh near the anchor plate is prevented. The proposed design assessment reveals that the presence of ropes provides possible cost reductions in the choice of the mesh type.

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Particle-based modelling of cortical meshes for soil retaining applications

Cited by 7 publications

References 1 publication

Discrete element analysis of the punching behaviour of a secured drapery system: from laboratory characterization to idealized in situ conditions

Discrete element analysis of the punching behaviour of a secured drapery system: from laboratory characterization to idealized in situ conditions

Towards a Hybrid Design Approach of Anchored Drapery Systems

Reinforced Drapery Meshes: A Design Method Accounting for Retaining Ropes Contribution

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