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Media type:
E-Article
Title:
Performance of hemp-FRCM-strengthened beam subjected to cyclic loads
Contributor:
Mercedes, L.;
Mendizábal, V.;
Bernat-Maso, E.;
Gil, L.
Published:
Editorial CSIC, 2022
Published in:
Materiales de Construcción, 72 (2022) 345, Seite e270
Language:
Not determined
DOI:
10.3989/mc.2022.07721
ISSN:
1988-3226;
0465-2746
Origination:
Footnote:
Description:
Fabric-reinforced cementitious matrix (FRCM) composites are materials that are usually applied to strengthen existing structures. In this study, a hemp mesh coated with epoxy was manufactured and combined with a cementitious matrix to strengthen a concrete beam. This beam was subjected to bending cyclic loading tests and a nondestructive modal analysis test. The modal analysis was performed to determine the dynamic elastic properties of the beam under pre-cracking, post-cracking, and strengthened conditions. The beam stiffness increased following strengthening with hemp-FRCM. The results of the experimental cyclic loading test showed that the hemp-FRCM system improved the load-bearing capacity of the beam at the service limit state by 42%. Analytical and numerical models were adjusted and validated using the experimental results, and both proved to be effective calculation tools. The models accurately reproduced the behaviour of the FRCM-strengthened concrete beam if the strengthening connection could prevent sliding and mortar debonding failures.