Design Approach for Secured Drapery Systems

Grimod, Alberto; Giacchetti, Giorgio

doi:10.1007/978-3-319-04996-0_17

Cited by 4 publications

(5 citation statements)

References 2 publications

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“…The response of steel mesh is significantly influenced by the testing boundary conditions. The laboratory and field tests on the double‐twisted wire mesh also show the same trend . It should be noted that mesh in model 3 is stiffer than model 2.…”

Section: Evaluation Of the Force‐displacement Response Of Steel Mesh supporting

confidence: 57%

“…The laboratory and field tests on the double-twisted wire mesh also show the same trend. 8,14 It should be noted that mesh in model 3 is stiffer than model 2. The reason is that the distance from nearest bolts to the center of the punch device in model 3 is smaller than model 2 (1.5 m vs 2.1 m).…”

Section: Models Of Punch Tests With Different Boundary Conditionsmentioning

confidence: 99%

“…In this scenario, unstable rock blocks will push and deform the steel mesh to generate tensile forces in the wires. The force‐displacement response of the steel mesh can be used to estimate the external forces that are applied by the mesh to the unstable rock blocks …”

Section: Introductionmentioning

confidence: 99%

“…The force-displacement response of the steel mesh can be used to estimate the external forces that are applied by the mesh to the unstable rock blocks. 8 For either design assumption, knowledge of the force-displacement response of the steel mesh is essential to determine the support forces that can be generated on an unstable rock block or to determine the amount of deformation that occurs in the mesh in response to displacement of the rock block. Laboratory punch tests have been used to investigate the force-displacement response of different types of steel mesh.…”

Section: Introductionmentioning

confidence: 99%

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Discrete element analysis of the influence of bolt pattern and spacing on the force‐displacement response of bolted steel mesh

Tannant

Zheng

2019

Num Anal Meth Geomechanics

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Summary Steel wire mesh held by a pattern of bolts can be used to stabilize a rock slope. Knowledge of the force‐displacement response of steel mesh is essential in the design of this support system. Laboratory tests have been used to test mesh that is held to rigid steel frames. These testing conditions differ from how steel mesh is held in the field by bolts. The existing laboratory test data may underestimate the deformation and overestimate the load‐bearing capacity of the steel mesh. This paper focuses on the response of the high tensile strength steel mesh held by commonly used bolt patterns. Discrete element models were used to study the force‐displacement response of the steel mesh pinned by bolts. The influences of different bolt patterns and varying ratios of bolt spacing on the effectiveness of steel wire mesh were analyzed. Relationships between the resistance force of steel mesh and bolt density at various mesh deformations were developed. These relationships can help engineers choose the bolt spacing and provide an estimate of the resistance force that a steel mesh can mobilize at a desired deformation limit for a given bolt pattern.

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Section: Evaluation Of the Force‐displacement Response Of Steel Mesh supporting

confidence: 57%

Section: Models Of Punch Tests With Different Boundary Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Discrete element analysis of the influence of bolt pattern and spacing on the force‐displacement response of bolted steel mesh

Tannant

Zheng

2019

Num Anal Meth Geomechanics

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“…where L i is the length in the weathered mass (equal to s/ cos θ 0 ), and L p is the length in which plastic phenomena occur (approximately varying from 0.10 m for hard rock up to 0.45 m for very weak rock [32]). It is worth noting that the pull-out resistance of the anchor should be higher than the tensile force developed by the stripping by the mesh due to the retention of single blocks.…”

Section: Anchor Designmentioning

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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