Details
| Original language | English |
|---|---|
| Article number | 134070 |
| Number of pages | 18 |
| Journal | Construction and Building Materials |
| Volume | 409 |
| Early online date | 8 Nov 2023 |
| Publication status | Published - 15 Dec 2023 |
Abstract
The prestressed strengthening of structures via use of bonded iron-based shape memory alloys (Fe-SMAs) has proven promising, albeit with concerns regarding the temperature dependency of the adhesive properties. In this study, the effect of activation temperature and generated prestress are investigated experimentally. Six Fe-SMA-to-steel adhesively bonded joints, comprising different Fe-SMA strips (non-prestrained and prestrained) and activation strategies (full activation and partial activation), were prepared, activated via electrical resistance heating, and tested under quasi-static loading. It is found that the bond–slip behavior of a joint with activation can be modeled by that of an equivalent non-activated joint. The generated prestress influences the full-range behavior by raising the base tensile stress level of the Fe-SMA strip, with negligible effects on further aspects of the full-range behavior. With the increasing activation temperature, the fracture energy is initially increased and eventually reduced, while the bond capacity and effective bond length are retained almost constant.
Keywords
- Activation of prestress, Debonding, Full-range behavior, Local heating damage, Memory steel (Fe-SMA)
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Building and Construction
- Materials Science(all)
- General Materials Science
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Construction and Building Materials, Vol. 409, 134070, 15.12.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of activation temperature and prestress on behavior of Fe-SMA bonded joints
AU - Li, Lingzhen
AU - Chatzi, Eleni
AU - Czaderski, Christoph
AU - Ghafoori, Elyas
N1 - Funding Information: The authors acknowledge the China Scholarship Council (CSC) for co-financing the PhD project of the first author. re-fer AG and Sika AG are appreciated to provide Fe-SMA and adhesive materials, respectively. Special thanks go to Mr. André Kupferschmid from the Transport at Nanoscale Interfaces Laboratory at Empa and Mr. Giovanni Saragoni and Mr. Robert Widmann in the Bauhalle team at Empa for their technical support.
PY - 2023/12/15
Y1 - 2023/12/15
N2 - The prestressed strengthening of structures via use of bonded iron-based shape memory alloys (Fe-SMAs) has proven promising, albeit with concerns regarding the temperature dependency of the adhesive properties. In this study, the effect of activation temperature and generated prestress are investigated experimentally. Six Fe-SMA-to-steel adhesively bonded joints, comprising different Fe-SMA strips (non-prestrained and prestrained) and activation strategies (full activation and partial activation), were prepared, activated via electrical resistance heating, and tested under quasi-static loading. It is found that the bond–slip behavior of a joint with activation can be modeled by that of an equivalent non-activated joint. The generated prestress influences the full-range behavior by raising the base tensile stress level of the Fe-SMA strip, with negligible effects on further aspects of the full-range behavior. With the increasing activation temperature, the fracture energy is initially increased and eventually reduced, while the bond capacity and effective bond length are retained almost constant.
AB - The prestressed strengthening of structures via use of bonded iron-based shape memory alloys (Fe-SMAs) has proven promising, albeit with concerns regarding the temperature dependency of the adhesive properties. In this study, the effect of activation temperature and generated prestress are investigated experimentally. Six Fe-SMA-to-steel adhesively bonded joints, comprising different Fe-SMA strips (non-prestrained and prestrained) and activation strategies (full activation and partial activation), were prepared, activated via electrical resistance heating, and tested under quasi-static loading. It is found that the bond–slip behavior of a joint with activation can be modeled by that of an equivalent non-activated joint. The generated prestress influences the full-range behavior by raising the base tensile stress level of the Fe-SMA strip, with negligible effects on further aspects of the full-range behavior. With the increasing activation temperature, the fracture energy is initially increased and eventually reduced, while the bond capacity and effective bond length are retained almost constant.
KW - Activation of prestress
KW - Debonding
KW - Full-range behavior
KW - Local heating damage
KW - Memory steel (Fe-SMA)
UR - http://www.scopus.com/inward/record.url?scp=85176100416&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2023.134070
DO - 10.1016/j.conbuildmat.2023.134070
M3 - Article
AN - SCOPUS:85176100416
VL - 409
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 134070
ER -