Advanced Numerical Modelling of Geogrids and Steel Wire Meshes

2021 ◽  
pp. 875-882
Author(s):  
Daniele Tubertini ◽  
Rinaldo Uccellini ◽  
Marco Vicari
Keyword(s):  
Numerical Modelling ◽  
Steel Wire ◽  
Wire Meshes

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

2021 ◽  
Author(s):  
Antonio Pol ◽  
Fabio Gabrieli ◽  
Lorenzo Brezzi
Keyword(s):  
Mechanical Response ◽  
Steel Wire ◽  
Discrete Element ◽  
Wire Mesh ◽  
Steel Plates ◽  
Loading Conditions ◽  
Element Analysis ◽  
In Situ Conditions ◽  
Wire Meshes

AbstractIn 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.

Behavior of Self Compacted Concrete Ferrocement Beams

2021 ◽  
pp. 1-14
Author(s):  
Abeer M. Erfan ◽  
Tamer H. K. Elafandy ◽  
Mahmoud M. Mahran ◽  
Mohamed Said
Keyword(s):  
Energy Absorption ◽  
Low Cost ◽  
Steel Wire ◽  
Construction Material ◽  
Point Load ◽  
Wire Mesh ◽  
Experimental Program ◽  
Cracking Behavior ◽  
Group B ◽  
Wire Meshes

Many researchers have been conducted on the ferrocement as a low cost construction material and a flexible structural system. This experimental investigation on the behavior of ferrocement beams after exposed to different type of ferrocement and different of ferrocement layer are presented in this paper. The experimental program consisted of seven simply supported beams tested up to failure under four-point load. The dimensions of 150mm×250mm×2000mm. Each beam was reinforced using steel 2 f 12 in top and 2 f10 in bottom and the stirrups was 10 f 10/m. In addition to six of them contains ferrocement different steel wire meshes and different of ferrocement layer. The test specimens are divided in three groups and the results of each one compared with the control specimen. The first group (A) which used the welded wire mesh. The second group (B) which used the expanded wire mesh. But the third group (C) which reinforced using woven wire mesh. The mid span deflection, cracks, reinforcement and concrete strains of the tested beams were recorded and compared. The performance of the test beams in terms of ultimate flexure load cracking behavior and energy absorption were investigated. The experimental results emphasized that high ultimate loads, better crack resistance control, high ductility, and good energy absorption properties could be achieved by using the proposed ferrocement beams. The cracks propagation decreased and its number and width decreased by using woven, expanded and welded wire mesh especially in specimens with two layers of wire mesh. Theoretical calculation was carried out to compare the oplained results with the theoretical ones, which show good agreement.

Reinforced Jacketing of Wall Panels: A Comparative Experimental Investigation

2019 ◽  
Vol 817 ◽  
pp. 536-543
Author(s):  
Romina Sisti ◽  
Antonio Borri ◽  
Marco Corradi ◽  
Allen Dudine
Keyword(s):  
Steel Wire ◽  
Wire Mesh ◽  
Fiber Reinforced Polymers ◽  
Welded Steel ◽  
Lateral Capacity ◽  
Glass Fiber Reinforced ◽  
Wall Panels ◽  
Comparative Experimental Investigation ◽  
Steel Wire Mesh ◽  
Wire Meshes

This paper presents the results of a laboratory investigation carried out on reinforced mortar plates. Reinforced mortar plates are often applied for shear reinforcement of wall panels. Different reinforcement materials have been embedded into the mortar plates: GFRP (Glass Fiber Reinforced Polymers) grids, fiberglass fabrics and welded steel-wire meshes. This is the first stage in the development of a new type of GFRP-reinforced mortar jacketing, that will provide a solution to enhance the lateral capacity of historic buildings. Such reinforced plates can also be used in applications on new masonry constructions where buildings with damaged or cracked wall panels need to be repaired or retrofitted. The mortar plates were built from commercially available GFRP grids and fabrics that were embedded into the mortar to form a reinforced-mortar square structure of 1 m with a thickness of 30 mm. The plates were tested in the laboratory, under quasi-static patch loads that exceeded the expected seismic loads. The goal of the testing program was to assess the design and construction techniques used, with a view to designing the reinforcement of a historic building. The laboratory tests demonstrated that the GFRP-reinforced plates had sufficient stiffness and strength to function effectively. By comparing the results with the more traditional steel-wire mesh reinforcement, it was also possible to perform a comparative analysis.

Photocatalytic degradation activity of titanium dioxide sol–gel coatings on stainless steel wire meshes

2010 ◽  
Vol 124 (2-3) ◽  
pp. 1225-1231 ◽  
Author(s):  
M. Bestetti ◽  
D. Sacco ◽  
M.F. Brunella ◽  
S. Franz ◽  
R. Amadelli ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Steel Wire ◽  
Sol Gel ◽  
Stainless Steel Wire ◽  
Degradation Activity ◽  
Wire Meshes

Aspects of Die Geometry Influencing Drawability of Metals During Wire Drawing: A Literature Review

2014 ◽  
Vol 14 (3) ◽  
pp. 141-149 ◽  
Author(s):  
Floyd Banda ◽  
Levy Siaminwe ◽  
Henry M. Mwenda
Keyword(s):  
Steel Wire ◽  
Wire Drawing ◽  
Quality Characteristics ◽  
Power Cables ◽  
Die Geometry ◽  
Wire Ropes ◽  
Drawing Die ◽  
Wire Meshes ◽  
Metal Wires

AbstractDrawn metal wires such as copper cables, aluminium wires and steel wires have found several applications which have an impact on the domestic and commercial economic uses, namely power cables, welding cables, wire ropes, wire meshes, electrode and filler wire, etc. All these applications require the use of good quality wires. However, this is not easily achieved since wire production faces many challenges. The influence of the drawing die on drawability and the need to maintain the required quality characteristics of the wire stand out among these challenges. This paper gives a background to wire drawing by highlighting the challenges of attaining the required drawability and quality characteristics during wire drawing. It was found from the literature that the draw die geometry has the greatest influence on the quality of copper, aluminium and steel wire products.

scholarly journals Basic Study on Deformation Evaluation of Steel Wire Mesh for Rational Gabion Structure Design

2019 ◽  
Vol 2 (2) ◽  
pp. 109-115
Author(s):  
Hiroshi Nakazawa ◽  
Tsuyoshi Nishi ◽  
Hiroyuki Kurihara ◽  
Daisuke Suetsugu ◽  
Tadashi Hara
Keyword(s):  
Design Method ◽  
Steel Wire ◽  
Tensile Tests ◽  
Structure Design ◽  
Wire Mesh ◽  
Deformation Characteristics ◽  
Basic Study ◽  
Tensile Direction ◽  
The Wire ◽  
Wire Meshes

Gabion structures are used in a variety of ways in Japan and around the world because they allow for the creation of simple structures at highly reasonable construction costs and completion periods. Previous earthquake damage surveys have shown that, in many cases, gabion structures did not collapse even though deformation was allowed, and have demonstrated that the wire mesh used in their construction has a high confinement effect on the stones filling the gabion. Despite this, gabions have not been actively utilized, nor have they been used to construct permanent structures in Japan because the design and construction of such structures are based on experience, and a standardized design method has not been developed. Hence, in order to facilitate development a design method for gabion-based structures, we must first go back to the basics and establish a detailed explanation of the wire mesh deformation mechanism of such structures. In this study, we performed tensile tests on wire meshes of different shapes in order to determine their strength and deformation characteristics and then conducted numerical analyses using the results obtained. The tensile tests revealed that deformation characteristics differed depending on the mesh shape and tensile direction. We also showed that the direction in which the tension acts and the mesh nodes are important, and that the test results could be reproduced via numerical analysis with the finite element method by using beam elements.

A Study of the Parametric Effects on Magnetic Coal Ceaning

1989 ◽  
Vol 203 (2) ◽  
pp. 93-100 ◽  
Author(s):  
A C Lua ◽  
R F Boucher
Keyword(s):  
Flue Gas ◽  
Steel Wire ◽  
Additional Benefit ◽  
Air Velocity ◽  
High Gradient Magnetic Separation ◽  
Total Sulphur ◽  
Power Stations ◽  
Coal Cleaning ◽  
Parametric Effects ◽  
Wire Meshes

A coal-cleaning technique was evaluated to determine its effectiveness to remove sulphur and ash contents of dry pulverized coals before combustion in power stations. Dry high-gradient magnetic separation (HGMS) experiments were conducted on a British coal from Coalfield Farm North using ferromagnetic stainless steel wire meshes as the separator matrix which was located in the bore of a superconducting solenoid magnet. The parametric effects of magnetic field, air velocity and separator length on the process were investigated. Increasing magnetic fields and separator lengths and decreasing air velocities each individually increases the percentage reductions of pyritic sulphur, total sulphur and ash. Reduction efficiencies up to 91, 65 and 61 per cent for pyritic sulphur, total sulphur and ash respectively were obtained. These results have at least shown that dry HGMS could possibly provide a simple and economic alternative to flue gas desulphurization to reduce sulphur dioxide emissions to the atmosphere from coal-fired power stations, with the additional benefit of an ash removal capability.

Feasibility of using self-compacting concrete in civil engineering applications

2017 ◽  
Vol 8 (3) ◽  
pp. 70
Author(s):  
Zeinab A. Etman ◽  
Mounir M. Kamal ◽  
Mohamed R. Afify ◽  
Tamer I. Ahmaed
Keyword(s):  
Cross Section ◽  
Civil Engineering ◽  
Steel Wire ◽  
Element Model ◽  
Concrete Cover ◽  
Wire Mesh ◽  
Self Compacting Concrete ◽  
Engineering Applications ◽  
Line Load ◽  
Wire Meshes

This research aimed to investigate the feasibility of using self-compacting concrete in civil engineering applications as a producing a precast hollow unit. The behavior of the hollow sections cast with self-compacted concrete beneath line-load was evaluated. An experimental work was carried out and a finite element model with ANSYS (version 15) was adopted. A total of fourteen hollow beams were cast and tested. The most variables taken into thought were; the types of reinforcement (reinforced steel bar and steel wire meshes), the types of steel wire meshes (expanded and welded steel wire mesh), number of layers of steel meshes (one layer and two layers), cross section thickness of concrete (40 mm and 60mm), concrete cover thickness (15mm and 20 mm) and also the shapes of cross section (square or circular). Special attention to initial cracking load, ultimate load, deflection, cracking pattern, energy absorption and ductility index were investigated. Good agreement was found compared with the experimental results. Out of this research; this paper presents applications of self-compacted concrete for casting skinny structural hollow members. These members can be used as precast units within the construction of the tunnel to decrease the problems in highway roads due to the difficulty of using crossing bridges particularly for kids and old people which are very useful for developing countries with great economic advantages.

Effects of a Wire Mesh on Droplet Size and Velocity Distributions of Cryogenic Sprays

2005 ◽  
Author(s):  
Walfre Franco ◽  
Henry Vu ◽  
Guillermo Aguilar
Keyword(s):  
Steel Wire ◽  
Spray Cooling ◽  
Wire Mesh ◽  
Heat Extraction ◽  
Particle Analysis ◽  
Spray Nozzle ◽  
Spray Cone ◽  
Radial Velocity Profile ◽  
Wire Meshes ◽  
Lateral Heat

Cryogen spray cooling allows removing large amounts of heat in short periods of time. Previous investigations have shown that stainless steel wire meshes placed between spray nozzle and target surfaces effectively increase uniformity in lateral heat extraction while reducing cooling efficiency. In this study we used phase Doppler particle analysis to assess the effect of a wire mesh on the diameter and velocity radial distributions of cryogen droplets and, consequently, on the surface heat transfer. We measured at 40 mm downstream and various radial locations within steady state spray cones from two different nozzles without and with a mesh at two mesh-nozzle distances. Results show that with the mesh, droplets lose velocity and increase in size. The closer to the center of the spray cone the droplets are, the larger the loss in velocity. As a consequence, the radial velocity profile is more uniform relative to that without a mesh.

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