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dc.contributor.author
Lämmlein, Tobias D.
dc.contributor.author
Messina, Francesco
dc.contributor.author
Griffa, Michele
dc.contributor.author
Terrasi, Giovanni P.
dc.contributor.author
Lura, Pietro
dc.date.accessioned
2017-10-17T09:21:54Z
dc.date.available
2017-10-06T02:55:53Z
dc.date.available
2017-10-17T09:21:54Z
dc.date.issued
2017-02
dc.identifier.other
10.3390/polym9020078
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/191206
dc.identifier.doi
10.3929/ethz-b-000191206
dc.description.abstract
The bond behaviour of novel, sand-coated ultra-high modulus (UHM) carbon fibre reinforced polymers (CFRP) tendons to high performance concrete (HPC) was studied by a combined numerical and experimental approach. A series of pull-out tests revealed that the failure type can vary between sudden and continuous pull-out depending on the chosen sand coating grain size. Measuring the same shear stress vs. tendon draw-in ( - ) curves in the same test set-up, for sand coated CFRP tendons with a longitudinal stiffness of 137 and 509 GPa, respectively, indicated that the absolute bond strength in both cases was not influenced by the tendon’s stiffness. However, the - curves significantly differed in terms of the draw-in rate, showing higher draw-in rate for the UHM CFRP tendon. With the aid of X-ray computed tomography (CT), scanning electron microscopy (SEM) and visual analysis methods, the bond failure interface was located between the CFRP tendon and the surrounding sand-epoxy layer. For further investigation, a simplified finite element analysis (FEA) of the tendon pull-out was performed using a cohesive surface interaction model and the software Abaqus 6.14. A parametric study, varying the tendon-related material properties, revealed the tendon’s longitudinal stiffness to be the only contributor to the difference in the - curves found in the experiments, thus to the shear stress transfer behaviour between the CFRP tendon and the concrete. In conclusion, the excellent bond of the sand-coated UHM CFRP tendons to HPC as well as the deeper insight in the bond failure mechanism encourages the application of UHM CFRP tendons for prestressing applications.
en_US
dc.language.iso
en
en_US
dc.publisher
MDPI
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
CFRP
en_US
dc.subject
UHM carbon fibre
en_US
dc.subject
UTS carbon fibre
en_US
dc.subject
prestressing tendon
en_US
dc.subject
sand coated
en_US
dc.subject
bond
en_US
dc.subject
HPC
en_US
dc.subject
Pull-out test
en_US
dc.subject
Finite element modelling (FEM)
en_US
dc.subject
X-ray tomography
en_US
dc.title
Bond Performance of Sand Coated UHM CFRP Tendons in High Performance Concrete
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2017-02-22
ethz.journal.title
Polymers
ethz.journal.volume
9
en_US
ethz.journal.issue
2
en_US
ethz.pages.start
78
en_US
ethz.size
18 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.publication.place
Basel
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2017-10-06T02:55:57Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-10-17T09:21:59Z
ethz.rosetta.lastUpdated
2017-12-22T02:17:33Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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