Performance of hemp-FRCM-strengthened beam subjected to cyclic loads
| Autor: | L. Mercedes, V. Mendizábal, E. Bernat-Maso, L. Gil |
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| Jazyk: | English<br />Spanish; Castilian |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Materiales de Construccion, Vol 72, Iss 345 (2022) |
| Druh dokumentu: | article |
| ISSN: | 0465-2746 1988-3226 |
| DOI: | 10.3989/mc.2022.07721 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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