Digitally fabricated weak interfaces to reduce minimum reinforcement in concrete structures
dc.contributor.author
Bischof, Patrick
dc.contributor.author
Mata Falcón, Jaime
dc.contributor.author
Ammann, Rebecca
dc.contributor.author
Näsbom, Andreas
dc.contributor.author
Kaufmann, Walter
dc.date.accessioned
2023-09-07T13:52:08Z
dc.date.available
2022-12-07T19:12:09Z
dc.date.available
2022-12-08T06:24:29Z
dc.date.available
2023-09-07T13:52:08Z
dc.date.issued
2023-04
dc.identifier.issn
1464-4177
dc.identifier.issn
1751-7648
dc.identifier.other
10.1002/suco.202200732
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/585693
dc.identifier.doi
10.3929/ethz-b-000585693
dc.description.abstract
Crack initiators in reinforced concrete structures can facilitate fulfilling the serviceability requirements. They can be used as a design parameter to diminish the minimum reinforcement for members subject to imposed deformation and exposed to the environment as they reduce the crack spacing and width when arranged close enough. While crack initiators in conventional concrete construction are cumbersome to provide (e.g., by construction joints or taperings), they are inherent to layered extrusion processes with digital fabrication technologies: the tensile strength is typically reduced locally in interfaces between layers. Rather than trying to avoid these weak interfaces, this paper discusses the potential of taking advantage of them to act as crack initiators reducing the minimum reinforcement content. A tension chord-based model is developed to (i) account for the local strength reduction and (ii) predict the effect of weak interfaces on the expected crack spacing and width. As a key finding, the model predicts a reduction of the required minimum reinforcement ratio proportional to the locally decreased concrete tensile strength for a specified maximum crack width requirement under imposed deformations. An experimental campaign on five layered and three reference tension ties confirmed the clearly positive impact of weak interfaces on crack spacings and widths.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
International Federation for Structural Concrete
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
concrete structures
en_US
dc.subject
crack initiators
en_US
dc.subject
digital fabrication
en_US
dc.subject
material efficiency
en_US
dc.subject
minimum reinforcement
en_US
dc.subject
weak interfaces
en_US
dc.title
Digitally fabricated weak interfaces to reduce minimum reinforcement in concrete structures
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2022-12-07
ethz.journal.title
Structural Concrete
ethz.journal.volume
24
en_US
ethz.journal.issue
2
en_US
ethz.journal.abbreviated
Struct. concr.
ethz.pages.start
1835
en_US
ethz.pages.end
1855
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.status
published
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
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
en_US
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.isSupplementedBy
10.3929/ethz-b-000560852
ethz.date.deposited
2022-12-07T19:12:09Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2022-12-08T06:24:52Z
ethz.rosetta.lastUpdated
2025-02-14T05:30:56Z
ethz.rosetta.exportRequired
true
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true
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