Innovative Seismic Strengthening Techniques to Be Used in RC Beams’ Critical Zones
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10362/150801 |
Resumo: | Publisher Copyright: © 2022 by the authors. |
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Innovative Seismic Strengthening Techniques to Be Used in RC Beams’ Critical Zonescyclic experimental testfibre reinforced concretegravity loadjacketingpost-tensionRC beam critical zoneretrofitArchitectureCivil and Structural EngineeringBuilding and ConstructionPublisher Copyright: © 2022 by the authors.The seismic performance of a structural frame system can be enhanced by strengthening the RC beams’ critical zones. In this paper is presented an experimental study on the improvement of the beam behaviour, subjected to an alternative cyclic procedure which considers the gravity loads reflecting the real demands on the beams’ critical zone. Two strengthening solutions are presented: unbounded post-tension (PT) tendon strengthening to increase resistance and limit residual deformations, and unbounded post-tensioning with jacketing of the RC beam with unidirectional fibre mat reinforced grout (UFRG) to limit compression damage, improving section confinement, thus delaying concrete crushing and buckling of longitudinal reinforcement. The original UFRG material was developed within this study, to apply as a small thickness jacketing material for strengthening RC structures. The main idea was that the steadiness provided by preplacing continuous fibre mats into the mould reduced the fibres’ segregation tendency during the high-performance grout pouring and allowed for the optimisation of their percentage and alignment, attaining a higher tensile strength. The experimental response of the tested Specimens is presented and evaluated through performance parameters that are properly discussed and adjusted to the alternative cyclic procedure. Finally, theoretical predictions are presented, and an adjustable multilinear model is proposed to estimate the strengthening solution’s response.CERIS - Polo NOVADEC - Departamento de Engenharia CivilRUNGião, RitaLúcio, VálterChastre, Carlos2023-03-17T22:31:20Z2022-12-302022-12-30T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article20application/pdfhttp://hdl.handle.net/10362/150801engGião, R., Lúcio, V., & Chastre, C. (2022). Innovative Seismic Strengthening Techniques to Be Used in RC Beams’ Critical Zones. Buildings, 13(1), [95]. https://doi.org/10.3390/buildings130100952075-5309PURE: 56218327https://doi.org/10.3390/buildings13010095info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T05:33:14Zoai:run.unl.pt:10362/150801Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:54:19.685880Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Innovative Seismic Strengthening Techniques to Be Used in RC Beams’ Critical Zones |
title |
Innovative Seismic Strengthening Techniques to Be Used in RC Beams’ Critical Zones |
spellingShingle |
Innovative Seismic Strengthening Techniques to Be Used in RC Beams’ Critical Zones Gião, Rita cyclic experimental test fibre reinforced concrete gravity load jacketing post-tension RC beam critical zone retrofit Architecture Civil and Structural Engineering Building and Construction |
title_short |
Innovative Seismic Strengthening Techniques to Be Used in RC Beams’ Critical Zones |
title_full |
Innovative Seismic Strengthening Techniques to Be Used in RC Beams’ Critical Zones |
title_fullStr |
Innovative Seismic Strengthening Techniques to Be Used in RC Beams’ Critical Zones |
title_full_unstemmed |
Innovative Seismic Strengthening Techniques to Be Used in RC Beams’ Critical Zones |
title_sort |
Innovative Seismic Strengthening Techniques to Be Used in RC Beams’ Critical Zones |
author |
Gião, Rita |
author_facet |
Gião, Rita Lúcio, Válter Chastre, Carlos |
author_role |
author |
author2 |
Lúcio, Válter Chastre, Carlos |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
CERIS - Polo NOVA DEC - Departamento de Engenharia Civil RUN |
dc.contributor.author.fl_str_mv |
Gião, Rita Lúcio, Válter Chastre, Carlos |
dc.subject.por.fl_str_mv |
cyclic experimental test fibre reinforced concrete gravity load jacketing post-tension RC beam critical zone retrofit Architecture Civil and Structural Engineering Building and Construction |
topic |
cyclic experimental test fibre reinforced concrete gravity load jacketing post-tension RC beam critical zone retrofit Architecture Civil and Structural Engineering Building and Construction |
description |
Publisher Copyright: © 2022 by the authors. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-12-30 2022-12-30T00:00:00Z 2023-03-17T22:31:20Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10362/150801 |
url |
http://hdl.handle.net/10362/150801 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Gião, R., Lúcio, V., & Chastre, C. (2022). Innovative Seismic Strengthening Techniques to Be Used in RC Beams’ Critical Zones. Buildings, 13(1), [95]. https://doi.org/10.3390/buildings13010095 2075-5309 PURE: 56218327 https://doi.org/10.3390/buildings13010095 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
20 application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799138132425179136 |