Iron-Based shape memory alloy for strengthening of 113-Year bridge

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F21%3A00352032" target="_blank" >RIV/68407700:21110/21:00352032 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.engstruct.2021.113231" target="_blank" >https://doi.org/10.1016/j.engstruct.2021.113231</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.engstruct.2021.113231" target="_blank" >10.1016/j.engstruct.2021.113231</a>

Result language

angličtina

Original language name

Iron-Based shape memory alloy for strengthening of 113-Year bridge

Original language description

This study focuses on the large-scale application of a Fe-Mn-Si shape memory alloy (Fe-SMA) for strengthening a historic roadway bridge in Petrov nad Desnou (113-years), Czech Republic. To the best of the authors’ knowledge, this is the first application of an iron-based SMA (Fe-SMA) for prestressed strengthening of a bridge. In this study, the shape memory effect (SME) of the Fe-SMA was used for the prestressed strengthening of bridge girders. A mechanical anchorage system was developed to apply multiple Fe-SMA strips to the steel girders of the bridge subjected to daily passengers and heavy trucks. The SME of the Fe-SMA was activated by heating to approximately 260 °C using ceramic heating pads. The test results showed that the recovery stress of the Fe-SMA strips resulted in a compressive stress of approximately –33 MPa in the lower flange of the bridge girder. This compressive stress significantly increased the yield and fatigue capacity of the strengthened girder. Before and after the strengthening, the bridge was loaded with a 45-ton crane to assess the efficiency and performance of the system. Laboratory experiments were performed to optimize the mechanical anchors and examine the feasibility of the proposed strengthening method prior to application to the bridge. Finally, long-term monitoring of the prestressed Fe-SMA plates after installation on the bridge was conducted. The results showed that the main loss of the prestressing force caused by relaxation occurred within the first 30 days after activation and was approximately 20% of the original prestress.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20104 - Transport engineering

Project

<a href="/en/project/DG18P02OVV033" target="_blank" >DG18P02OVV033: The methods for achieving the sustainability of industrial heritage steel bridges</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Engineering Structures

ISSN

0141-0296

e-ISSN

1873-7323

Volume of the periodical

2021

Issue of the periodical within the volume

248C

Country of publishing house

GB - UNITED KINGDOM

Number of pages

15

Pages from-to

151-165

UT code for WoS article

000707488600001

EID of the result in the Scopus database

2-s2.0-85115767968