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

verfasst von

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.

Externe Organisation(en)

Eidgenössische Materialprüfungs- und Forschungsanstalt (EMPA)
University of California at Davis
re-fer AG
University of New South Wales (UNSW)
S&P Clever Reinforcement Company AG
University of Cambridge

Typ

Aufsatz in Konferenzband

Seiten

2139-2153

Anzahl der Seiten

15

Publikationsdatum

27.11.2021

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Tief- und Ingenieurbau

Elektronische Version(en)

https://doi.org/10.1007/978-3-030-88166-5_185 (Zugang: Geschlossen)