Experimental testing of low-energy rockfall catch fence meshes

Gao, Zhiwei; Al-Budairi, Hassan; Steel, Andrew

doi:10.1016/j.jrmge.2018.01.004

Cited by 10 publications

(6 citation statements)

References 10 publications

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“…During the impact process, a series of key sub events where experimental measurable quantities can be monitored were identified. During experimental tests, the peak boulder deceleration (PBD) and minimum boulder velocity (MBV) can be recorded using Inertial Measurements Units (IMU) built into an artificial boulder (Caviezel et al, 2018) or using video frames from high-speed cameras (Gao et al, 2018). The peak mesh displacement (PMD), also known as maximum elongation (EOTA, 2018), can be obtained through video frames (Volkwein, 2005;Thoeni et al, 2013;Gao et al, 2018) and it is one of the most commonly employed parameters to describe the barrier response.…”

Section: Resultsmentioning

confidence: 99%

“…During experimental tests, the peak boulder deceleration (PBD) and minimum boulder velocity (MBV) can be recorded using Inertial Measurements Units (IMU) built into an artificial boulder (Caviezel et al, 2018) or using video frames from high-speed cameras (Gao et al, 2018). The peak mesh displacement (PMD), also known as maximum elongation (EOTA, 2018), can be obtained through video frames (Volkwein, 2005;Thoeni et al, 2013;Gao et al, 2018) and it is one of the most commonly employed parameters to describe the barrier response. The peak force acting on the upslope anchors (PFA) is typically obtained from the deformation of wires and energy dissipating devices (Gentilini et al, 2013) while measuring the bending moment acting on the fence posts (BMP) is more difficult (Gottardi and Govoni, 2010).…”

Section: Resultsmentioning

confidence: 99%

“…Throughout the years, researchers have investigated the behaviour of FPS through experimental and numerical approaches, to provide a more accurate characterization of the barrier response and improve its design. During field tests, the barrier response is typically characterized with discrete data, by tracking the boulder deceleration, the peak force on the anchor wires, and maximum barrier deflection (Buzzi et al, 2013;Thoeni et al, 2013;Gao et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multiscale modelling of dynamic impact on highly deformable compound rockfall fence nets

Previtali

Ciantia

Spadea

et al. 2021

Proceedings of the Institution of Civil Engineers - Geotechnica

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Herein a discrete-element model of a full-scale compound mesh barrier, formed by interweaved double-twist hexagonal meshes and strand rope square meshes is presented. A plastic hardening model is employed to investigate the energy dissipation terms within the barrier. The computational effort required for model initialisation is reduced through a novel generation procedure. The effect of different impact positions on the energy dissipation within the barrier and the way the impact load is transmitted to the main structural elements of the barrier are investigated through a sensitivity analysis. The results show that the impact position has both qualitative and quantitative effects on the barrier response, which significantly modify the peak load acting on the structural elements and the combination of shear, tensile and moment loading on the fence posts.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multiscale modelling of dynamic impact on highly deformable compound rockfall fence nets

Previtali

Ciantia

Spadea

et al. 2021

Proceedings of the Institution of Civil Engineers - Geotechnica

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“…Ref. [10] introduced an innovative method to assess wire meshes' durability against rock impacts, which is key in safeguarding infrastructure with catch fences. The study found longer meshes to be more effective in absorbing impact through deformation, with supporting cables reducing lateral compression.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Performance of Gabion Walls as a High-Energy Rockfall Protection System Using 3D Numerical Analysis: A Case Study

Angın,

Karahasan

2024

Applied Sciences

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Cases of rockfalls that occurred on a slope in the Selendi District of Manisa Province are evaluated in this article. Field studies are evaluated and different measures are examined to reduce rockfall risk. Drone flights are used to evaluate previous studies and obtain 1/1000 scale digital topographic maps. These maps are used to create a 3D (three-dimensional) solid model of the project site, and on-site surveys are conducted to identify source rock locations and free blocks that pose a risk. Those 3D analyses are used to determine the paths, jump heights, and energies of the blocks in motion. The data from the 3D maps are used to determine the most appropriate remediation methods. The structural behavior of the recommended gabion wall, which is designed at a certain height and width as a result of rockfalls, has been examined. Structural behavior is determined by simulation based on the finite element model. Within the scope of this study, the ANSYS Workbench program is used. The “Explicit Dynamics” analysis type in ANSYS Workbench was chosen to examine the rockfall effect.

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“…They are characterized by a complex mechanical behavior due to the concurring effects of large inertial deformations, contact interactions and nonlinear material response. These structures are typically tested using either well-established quasi-static tensile and punching tests, or experimental dynamic impact tests, without bridging between the two approaches (Bertolo et al, 2009;Gao, et al, 2018;Mentani et al, 2018) . The studies that investigate the influence of additional net elements on the mesh are limited to longitudinal cables (Albaba et al, 2017;Mentani et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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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Experimental testing of low-energy rockfall catch fence meshes

Cited by 10 publications

References 10 publications

Multiscale modelling of dynamic impact on highly deformable compound rockfall fence nets

Multiscale modelling of dynamic impact on highly deformable compound rockfall fence nets

Evaluation of the Performance of Gabion Walls as a High-Energy Rockfall Protection System Using 3D Numerical Analysis: A Case Study

Discrete Element Modeling of Compound Rockfall Fence Nets

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