Discrete Element Modeling of Compound Rockfall Fence Nets

Previtali, Marco; Ciantia, Matteo Oryem; Spadea, Saverio; Castellanza, Riccardo; Crosta, Giovanni B.

doi:10.1007/978-3-030-64518-2_66

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…Reaction force is measured on the platter. Details are available in (Previtali et al, 2020b). Test #1 and #2 use the standard experimental force-displacement curve approach (Previtali et al, 2020a), the former with the tensile tester data, the latter the same data after the image analysis/extensometer correction.…”

Section: Numerical Testsmentioning

confidence: 99%

Development of a macro-element model for rockfall steel wires using

Previtali¹,

Ciantia²,

Spadea³

et al. 2021

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This paper aims to present a few aspects of the development of a plastic-hardening macro-element model for steel wires in flexible protection systems. First, the material behaviour is obtained using uniaxial tensile tests. Successively, the evolution of the elastic and plastic domain is obtained using a combination of physical tests, analytical models, and numerical simulations. Finally, the results obtained with the macro-element model are compared to those obtained using other approaches found in literature.

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Section: Numerical Testsmentioning

confidence: 99%

Development of a macro-element model for rockfall steel wires using

Previtali¹,

Ciantia²,

Spadea³

et al. 2021

Self Cite

View full text Add to dashboard Cite

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“…Among the mitigation measures, net fences (or rockfall barriers, or also catchment fences) are widely adopted due to their easiness of installation, to their relatively low weight not to instabilise the slope, as well as to their very high-energy absorption capacity, today up to 11,000 kJ. Despite the development of numerical models to analyse the behaviour of the system (Govoni et al 2011;Coulibaly et al 2019;Mentani et al 2018;Previtali et al 2021), their design procedure has been recently standardised (Peila and Ronco 2009;Grimod and Giacchetti 2014;Volkwein et al 2019), first thanks to the publication of ETAG 027 ( 2008), now EAD 340059-00-0106 (2018), which have regulated the placing on the EEA (European Economic Area) market. The approach consists in the execution of codified impact tests allowing to characterise each product based on its performance in terms of energy absorption capacity and nominal height.…”

Section: Introductionmentioning

confidence: 99%

Multiple Lines of Rockfall Net Fences: A Design Proposal of the System

Marchelli

2022

Rock Mech Rock Eng

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Net fences constitute a valuable and widely adopted solution for mitigating rockfall risk. Nevertheless, in complex morphological situation with several rocky cliffs, a single line cannot be effective, and a double line of net fences is thus often required. At present, the existing design procedure has been conceived for a single line, only. In the present work, a design procedure for double line of net fences is introduced, considering the double line as a system, in which the upslope line stops, or at least decelerates, the great majority of the blocks, while the downslope line stops the remaining part. As a system, the effects of actions and resistances should be evaluated as a whole. The integrative trajectory analyses are required to optimise the design in terms of necessary energy absorption capacity, height of the lines, and maintenance planning. This system is suitable for mitigating rockfall risk, especially in very complex situations.

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“…To date widespread use of DEM has been limited in a commercial setting due to the computational time required but recent developments have reduced this time including faster sample preparation (Ciantia et al, 2018) coupled with lower cost higher performance computing. This has resulted in an increase in DEM application to analyse boundary value problems at model (Boschi et al, 2020;Nguyen et al, 2020;Zhang et al, 2021) and field scale (Boon et al, 2014;Previtali et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Using discrete-element method hindcasting of screw pile performance for practical design

Sharif

Brown

Ciantia

et al. 2021

Géotechnique Letters

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Screw piles have been used to support a variety of structures due to their ease of installation and high axial capacity. Recently, screw piles have been proposed as an alternative foundation solution for offshore renewable structures due to their quiet or silent installation. Due to their variable geometry, design and prediction of installation requirements and its effect on in-service capacity may be challenging. In this research study, the discrete-element method (DEM) is used to numerically recreate a series of onshore field tests. The aim of the study is to investigate the ability of DEM to be used as a practical design tool for the design and deployment of screw piles. In this case study, the effect of the geometric helix pitch on the installation torque and tensile capacity of screw piles installed into sand is investigated. DEM results show that the geometric pitch of a screw pile appears to have little effect on the installation torque. The results show that DEM has the potential to be used as a practical design procedure for complex foundation installation where the simulation needs to capture installation effects.

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Discrete Element Modeling of Compound Rockfall Fence Nets

Cited by 5 publications

References 12 publications

Development of a macro-element model for rockfall steel wires using

Development of a macro-element model for rockfall steel wires using

Multiple Lines of Rockfall Net Fences: A Design Proposal of the System

Using discrete-element method hindcasting of screw pile performance for practical design

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