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Author Beltran, J.F.; Nunez, E.; Nunez, F.; Silva, I.; Bravo, T.; Moffat, R. pdf  doi
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  Title Static response of asymmetrically damaged metallic strands: Experimental and numerical approach Type
  Year 2018 Publication Construction And Building Materials Abbreviated Journal Constr. Build. Mater.  
  Volume 192 Issue Pages 538-554  
  Keywords Asymmetric damaged strands; Surface damage; Numerical model; Finite element simulation; Experimental test; Static capacity curve  
  Abstract In this study, the effect of the presence of broken wires (damage) asymmetrically distributed on metallic strands surfaces on their static response is assessed. To this end, a general mechanical model for multi layered strands is presented, in which damaged strands are treated as a 1D nonlinear beam under uncoupled biaxial bending and axial load (NLBM). The NLBM is validated by comparisons with the results obtained from an experimental program especially designed for studying the effect of surface damage distribution on strands response and 3D nonlinear finite element simulations. Analyses are carried out on two strand constructions: 1 x 7 and 1 x 19, in which the damage levels and strand diameters vary from 5% to 40% and from 3.5 mm to 22.2 mm, respectively. Results indicate that the NLBM accurate predicts the static response (residual strength, stiffness, axial strain field, and deformed configuration) of the asymmetrically damaged strands, achieving good computational efficiency and numerical robustness. (C) 2018 Elsevier Ltd. All rights reserved.  
  Address [Felipe Beltran, Juan] Univ Chile, Dept Civil Engn, Blanco Encalada 2002 Of 440, Santiago, Chile, Email: jbeltran@ing.uchile.cl;  
  Corporate Author Thesis  
  Publisher Elsevier Sci Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0950-0618 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000453494600046 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 953  
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Author Moffat, R.; Jadue, C.; Beltran, J.F.; Herrera, R. pdf  doi
openurl 
  Title Experimental evaluation of geosynthetics as reinforcement for shotcrete Type
  Year 2017 Publication Geotextiles And Geomembranes Abbreviated Journal Geotext. Geomembr.  
  Volume 45 Issue 3 Pages 161-168  
  Keywords Geosynthetics; Shotcrete; Geosynthetics reinforcement; Energy absorption; Shotcrete strength  
  Abstract One of the commonly used stabilization systems for rock tunnels is shotcrete. This fine aggregate mortar is usually reinforced for improving its tensile and shear strength. In deep tunnels, its capacity to absorb energy has been recently considered for design purposes, as large displacements of the wall are expected. Two of the most used materials of reinforcement are steel welded-wire mesh and fibers (steel or polypropylene) in the shotcrete mix. This study presents the results and discussion of an experimental test program conducted to obtain the load-deformation curves of reinforced shotcrete, according to ASTM C 1550, using geosynthetics grids and geotextiles as alternative reinforcement materials. In addition, plain shotcrete and steel welded-wire mesh reinforced shotcrete specimens are also considered in the experimental program as benchmark cases. The experimental results are analyzed in terms of maximum strength and toughness. Results show that the use of geosynthetics as a reinforcement material is a promising alternative to obtain shotcrete with energy absorption capacity comparable with the most common reinforcement materials used. (C) 2017 Elsevier Ltd. All rights reserved.  
  Address [Moffat, R.] Univ Adolfo Ibanez, Dept Civil Engn, Santiago, Chile, Email: ricardo.moffat@uai.cl;  
  Corporate Author Thesis  
  Publisher Elsevier Sci Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0266-1144 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000401879300004 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 733  
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