TY - GEN

T1 - Iron-Based Shape Memory Alloy (Fe-SMA) vs. CFRP for Prestressed Strengthening of Civil Metallic Structures

AU - Ghafoori, E.

AU - Hosseini, A.

AU - Michels, J.

AU - Izadi, M. R.

AU - Pellissier, E.

N1 - Publisher Copyright: © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

PY - 2021/11/27

Y1 - 2021/11/27

N2 - Iron-based shape memory alloy (Fe-SMA) is a smart material that has been recently engineered and developed for civil engineering applications. The Fe-SMA has become a new reinforcement material for prestressed-strengthening of structures. This article aims to provide the first systematic study on the comparison between these two reinforcement materials with a particular emphasis on conditions imposed in civil engineering. The production procedure, mechanical properties, fatigue, creep/relaxation, corrosion, thermal expansion, high-temperature and fire behavior of the Fe-SMA in comparison with those of carbon fibre-reinforced polymer (CFRP) material are discussed. In the next step, the static and fatigue behavior of different structural components strengthened by prestressed CFRPs or activated Fe-SMAs are explained. Finally, a cost analysis is carried out to compare the two strengthening solutions (with Fe-SMA and CFRP) for prestressed-strengthening of 6.4-m girders. The cost comparison revealed that although the current price of the Fe-SMA strips is higher than that of the normal modulus CFRP plates, both of the strengthening solutions are found to be almost equivalent from a cost-performance point of view, when the achievable prestressing force and the cost of the mechanical clamping systems are taken into consideration.

AB - Iron-based shape memory alloy (Fe-SMA) is a smart material that has been recently engineered and developed for civil engineering applications. The Fe-SMA has become a new reinforcement material for prestressed-strengthening of structures. This article aims to provide the first systematic study on the comparison between these two reinforcement materials with a particular emphasis on conditions imposed in civil engineering. The production procedure, mechanical properties, fatigue, creep/relaxation, corrosion, thermal expansion, high-temperature and fire behavior of the Fe-SMA in comparison with those of carbon fibre-reinforced polymer (CFRP) material are discussed. In the next step, the static and fatigue behavior of different structural components strengthened by prestressed CFRPs or activated Fe-SMAs are explained. Finally, a cost analysis is carried out to compare the two strengthening solutions (with Fe-SMA and CFRP) for prestressed-strengthening of 6.4-m girders. The cost comparison revealed that although the current price of the Fe-SMA strips is higher than that of the normal modulus CFRP plates, both of the strengthening solutions are found to be almost equivalent from a cost-performance point of view, when the achievable prestressing force and the cost of the mechanical clamping systems are taken into consideration.

KW - CFRP composite

KW - Cost comparison

KW - Fe-SMA reinforcement

KW - High-cycle fatigue

KW - Prestressed strengthening

UR - http://www.scopus.com/inward/record.url?scp=85121919090&partnerID=8YFLogxK

U2 - 10.1007/978-3-030-88166-5_185

DO - 10.1007/978-3-030-88166-5_185

M3 - Conference contribution

AN - SCOPUS:85121919090

SN - 9783030881658

T3 - Lecture Notes in Civil Engineering

SP - 2139

EP - 2153

BT - 10th International Conference on FRP Composites in Civil Engineering - Proceedings of CICE 2020/2021

A2 - Ilki, Alper

A2 - Ispir, Medine

A2 - Inci, Pinar

PB - Springer Science and Business Media Deutschland GmbH

T2 - 10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2021

Y2 - 8 December 2021 through 10 December 2021

ER -