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

authored by: E. Ghafoori, A. Hosseini, J. Michels, M. R. Izadi, E. Pellissier
Abstract: 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.
External Organisation(s): Swiss Federal Laboratories for Material Science and Technology (EMPA)
University of California at Davis
re-fer AG
University of New South Wales (UNSW)
S&P Clever Reinforcement Company AG
University of Cambridge
Type: Conference contribution
Pages: 2139-2153
No. of pages: 15
Publication date: 27.11.2021
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Civil and Structural Engineering
Electronic version(s): https://doi.org/10.1007/978-3-030-88166-5_185 (Access: Closed)