Details
| Original language | English |
|---|---|
| Article number | 04022255 |
| Journal | Journal of Structural Engineering (United States) |
| Volume | 149 |
| Issue number | 3 |
| Early online date | 23 Dec 2022 |
| Publication status | Published - Mar 2023 |
Abstract
An iron-based shape memory alloy (Fe-SMA) can be used to conveniently apply prestress strengthening via a heating and cooling procedure. Material-level tests demonstrated that prestress of Fe-SMAs is sensitive to mechanical and thermal loading. Durability of steel structures strengthened by Fe-SMAs when subjected to harsh service conditions, such as coupled thermomechanical cycles is not fully understood. In this study, high-cycle fatigue tests were conducted on damaged steel plates retrofitted with Fe-SMA strips. Four temperature scenarios were adopted: room temperature (RT), a low temperature (LT) of -20°C, a high temperature (HT) of 60°C, and a cyclic temperature (CT) from -20°C to 60°C. Results showed that regardless of temperature variation, the Fe-SMA presented reliable repairing effects on steel plates, of which, the fatigue life was 2.1-3.5 times larger than that of the unstrengthened samples. The difference in coefficients of thermal expansion (CTEs) between the Fe-SMA and steel, as well as loss of prestress of the Fe-SMA due to fatigue and thermal loading, both affected the fatigue performance of the retrofitted specimens.
Keywords
- Fatigue, Iron-based shape memory alloy (Fe-SMA), Steel plate, Strengthening, Temperature
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Building and Construction
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Journal of Structural Engineering (United States), Vol. 149, No. 3, 04022255, 03.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Fatigue Tests on Fe-SMA Strengthened Steel Plates Considering Thermal Effects
AU - Chen, Zhen Yu
AU - Gu, Xiang Lin
AU - Zhao, Xiao Ling
AU - Ghafoori, Elyas
AU - Yu, Qian Qian
PY - 2023/3
Y1 - 2023/3
N2 - An iron-based shape memory alloy (Fe-SMA) can be used to conveniently apply prestress strengthening via a heating and cooling procedure. Material-level tests demonstrated that prestress of Fe-SMAs is sensitive to mechanical and thermal loading. Durability of steel structures strengthened by Fe-SMAs when subjected to harsh service conditions, such as coupled thermomechanical cycles is not fully understood. In this study, high-cycle fatigue tests were conducted on damaged steel plates retrofitted with Fe-SMA strips. Four temperature scenarios were adopted: room temperature (RT), a low temperature (LT) of -20°C, a high temperature (HT) of 60°C, and a cyclic temperature (CT) from -20°C to 60°C. Results showed that regardless of temperature variation, the Fe-SMA presented reliable repairing effects on steel plates, of which, the fatigue life was 2.1-3.5 times larger than that of the unstrengthened samples. The difference in coefficients of thermal expansion (CTEs) between the Fe-SMA and steel, as well as loss of prestress of the Fe-SMA due to fatigue and thermal loading, both affected the fatigue performance of the retrofitted specimens.
AB - An iron-based shape memory alloy (Fe-SMA) can be used to conveniently apply prestress strengthening via a heating and cooling procedure. Material-level tests demonstrated that prestress of Fe-SMAs is sensitive to mechanical and thermal loading. Durability of steel structures strengthened by Fe-SMAs when subjected to harsh service conditions, such as coupled thermomechanical cycles is not fully understood. In this study, high-cycle fatigue tests were conducted on damaged steel plates retrofitted with Fe-SMA strips. Four temperature scenarios were adopted: room temperature (RT), a low temperature (LT) of -20°C, a high temperature (HT) of 60°C, and a cyclic temperature (CT) from -20°C to 60°C. Results showed that regardless of temperature variation, the Fe-SMA presented reliable repairing effects on steel plates, of which, the fatigue life was 2.1-3.5 times larger than that of the unstrengthened samples. The difference in coefficients of thermal expansion (CTEs) between the Fe-SMA and steel, as well as loss of prestress of the Fe-SMA due to fatigue and thermal loading, both affected the fatigue performance of the retrofitted specimens.
KW - Fatigue
KW - Iron-based shape memory alloy (Fe-SMA)
KW - Steel plate
KW - Strengthening
KW - Temperature
UR - http://www.scopus.com/inward/record.url?scp=85144597345&partnerID=8YFLogxK
U2 - 10.1061/JSENDH.STENG-11694
DO - 10.1061/JSENDH.STENG-11694
M3 - Article
AN - SCOPUS:85144597345
VL - 149
JO - Journal of Structural Engineering (United States)
JF - Journal of Structural Engineering (United States)
SN - 0733-9445
IS - 3
M1 - 04022255
ER -