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dc.contributor.author
Izadi, Mohammadreza
dc.contributor.author
Motavalli, Masoud
dc.contributor.author
Ghafoori, Elyas
dc.date.accessioned
2021-08-05T12:04:29Z
dc.date.available
2021-08-05T03:15:31Z
dc.date.available
2021-08-05T12:04:29Z
dc.date.issued
2021-10-15
dc.identifier.issn
0141-0296
dc.identifier.other
10.1016/j.engstruct.2021.112827
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/499558
dc.identifier.doi
10.3929/ethz-b-000499558
dc.description.abstract
Double-angle connections are prone to fatigue cracking in old steel bridges; however, owing to their complexity, there are not many retrofitting solutions for these details. This study proposes a retrofitting system for double-angle connections using iron-based shape memory alloys (Fe-SMAs). An innovative connection test setup equipped with an optical 3D digital image correlation (DIC) measurement system was developed. The retrofitting system included two end-anchorages set on either side of the connection. Fe-SMA strips were inserted inside the anchorages, and then were thermally activated (pre-stressed) to a temperature of 260 °C. Numerical finite element studies were performed to investigate the static behavior of the system. It was found that the activated/prestressed Fe-SMA strips not only apply a reverse positive moment on the connection (versus an undesirable negative fixity moment), but also “absorb” a portion of the negative moment, owing to the added axial stiffness. The proposed SMA-based system offers a versatile and cost-effective technique (with quick and easy installation) for bridge connections, and can significantly reduce the effects from undesirable sources of fatigue cracking.
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
Shape memory alloy (SMAs)
en_US
dc.subject
Damage
en_US
dc.subject
Fatigue crack
en_US
dc.subject
Rehabilitation
en_US
dc.subject
Pre-stressing
en_US
dc.subject
Optical measurements
en_US
dc.title
Thermally-activated shape memory alloys for retrofitting bridge double-angle connections
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2021-07-27
ethz.journal.title
Engineering Structures
ethz.journal.volume
245
en_US
ethz.journal.abbreviated
Eng. Struct.
ethz.pages.start
112827
en_US
ethz.size
10 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Amsterdam
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2021-08-05T03:15:39Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-08-05T12:04:37Z
ethz.rosetta.lastUpdated
2022-03-29T10:57:20Z
ethz.rosetta.versionExported
true
ethz.COinS
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