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dc.contributor.author
Lee, Minu
dc.contributor.author
Mata Falcón, Jaime
dc.contributor.author
Kaufmann, Walter
dc.date.accessioned
2022-04-26T07:09:47Z
dc.date.available
2022-04-26T06:40:48Z
dc.date.available
2022-04-26T07:09:47Z
dc.date.issued
2022-06-15
dc.identifier.issn
0141-0296
dc.identifier.other
10.1016/j.engstruct.2022.114270
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/543795
dc.identifier.doi
10.3929/ethz-b-000543795
dc.description.abstract
The use of high-strength fibrous materials offers great potential to serve as the main reinforcement in the flexural response of lightweight concrete structures. Specifically, weft-knitted textile reinforcement allows creating complex geometries (i.e. doubly curved or folded) and introducing straight inlays as well as spatial features such as ribs within the fabric to enhance the bond conditions between the reinforcement and the concrete. While the evaluation of uniaxial tension tests to characterise the mechanical behaviour is usually straightforward, the vast majority of bending tests of textile reinforced concrete elements in the literature are limited to load–displacement data, which does not give direct information on the mechanical behaviour and makes it difficult to compare specimens with different geometries or reinforcement contents. This study presents a methodology based on digital image correlation measurements to directly assess the response in the tension chord of reinforced concrete beams in four-point bending. This methodology was applied and validated in an experimental campaign consisting of 16 bending tests with weft-knitted textile reinforcement. Various fibre materials, coating types and specimen geometries were tested, and the results were compared to corresponding uniaxial tension tests with the same type of reinforcement, generally showing a good agreement in the load-deformation behaviour and the crack kinematics. However, the textile reinforcement could not be utilised to the tensile strength obtained in uniaxial tension since all bending beams failed prematurely either in a combined bending-shear type failure (for most of the cement paste-coated textiles) or due to the delamination of the textile within a shear crack (for all epoxy-coated textiles). The Tension Chord Model with an assumed constant bond-slip relationship and an equivalent reinforcement ratio in bending yielded a good prediction of the stress–strain relationship, the tension stiffening effect, the crack widths and spacing.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Textile reinforced concrete
en_US
dc.subject
Bending
en_US
dc.subject
Tension chord
en_US
dc.subject
Experimental study
en_US
dc.subject
Digital image correlation
en_US
dc.subject
Crack behaviour
en_US
dc.subject
KnitCrete
en_US
dc.title
Analysis of the tension chord in the flexural response of concrete elements: Methodology and application to weft-knitted textile reinforcement
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2022-04-25
ethz.journal.title
Engineering Structures
ethz.journal.volume
261
en_US
ethz.journal.abbreviated
Eng. Struct.
ethz.pages.start
114270
en_US
ethz.size
15 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Digital Fabrication - Advanced Building Processes in Architecture
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Oxford
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02100 - Dep. Architektur / Dep. of Architecture::02284 - NFS Digitale Fabrikation / NCCR Digital Fabrication
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02605 - Institut für Baustatik u. Konstruktion / Institute of Structural Engineering::09469 - Kaufmann, Walter / Kaufmann, Walter
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02605 - Institut für Baustatik u. Konstruktion / Institute of Structural Engineering::09469 - Kaufmann, Walter / Kaufmann, Walter
ethz.grant.agreementno
141853
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
NCCR (NFS)
ethz.relation.cites
10.3929/ethz-b-000520292
ethz.date.deposited
2022-04-26T06:40:55Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2022-04-26T07:09:54Z
ethz.rosetta.lastUpdated
2022-04-26T07:09:54Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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