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Flexural behavior of slender long‐span precast prestressed high‐strength concrete girders

2021-06-30Artigo científico Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Civil
datacite.subject.fosEngenharia e Tecnologia::Engenharia Mecânica
datacite.subject.fosEngenharia e Tecnologia::Engenharia dos Materiais
datacite.subject.fosCiências Naturais::Outras Ciências Naturais
datacite.subject.sdg07:Energias Renováveis e Acessíveis
datacite.subject.sdg11:Cidades e Comunidades Sustentáveis
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
dc.contributor.authorFernandes, Paulo
dc.contributor.authorCavaco, Eduardo
dc.contributor.authorMaranha, Paulo
dc.contributor.authorJúlio, Eduardo
dc.date.accessioned2026-02-19T18:36:12Z
dc.date.available2026-02-19T18:36:12Z
dc.date.issued2021-06-30
dc.descriptionFonte: https://www.researchgate.net/publication/352865987_Flexural_behavior_of_slender_long-span_precast_prestressed_high-strength_concrete_girders
dc.description.abstractThe flexural behavior of slender (1/40) long-span precast high-strength concrete girders was experimentally investigated as a competing solution to steel alternatives for highway overpasses. Half-scale specimens were produced using an economical and high-strength (120 MPa) concrete mixture, non-fiber reinforced, designed only with conventional raw materials, currently available at Portuguese precast companies. Two girder specimens were subjected to quasi-static short-term loading up to structural failure in bending. Results have shown the typical behavior of conventional reinforced concrete members in bending, despite the brittle behavior of non-fiber-reinforced high strength concretes. Results also showed acceptable ductility (2.6) and the ability of the girder specimens to experience large deformation without significant softening. An analytical approach, based on plane sections and short-term stress–strain constitutive model recommended by the Eurocode 2 for concrete up to the C90/105 strength class, showed to predict accurately the behavior of girders in bending, both to ultimate and serviceability limit states, including cracking, yielding, maximum loads, and ultimate deflections.eng
dc.description.sponsorshipThe authors would like to acknowledge all the support of Prégaia.
dc.identifier.citationFernandes P, Cavaco E, Maranha P, Júlio E. Flexural behavior of slender long-span precast prestressed high-strength concrete girders. Structural Concrete. 2021; 22: 2272–2288. https://doi.org/10.1002/suco.202100070.
dc.identifier.doi10.1002/suco.202100070
dc.identifier.eissn1751-7648
dc.identifier.issn1464-4177
dc.identifier.urihttp://hdl.handle.net/10400.8/15684
dc.language.isoeng
dc.peerreviewedyes
dc.publisherWiley
dc.relation.hasversionhttps://onlinelibrary.wiley.com/doi/10.1002/suco.202100070
dc.relation.ispartofStructural Concrete
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectbridges
dc.subjectgirders
dc.subjecthigh-strength concrete
dc.subjectlong-span
dc.subjectprecast
dc.subjectprestressed
dc.subjectslender
dc.titleFlexural behavior of slender long‐span precast prestressed high‐strength concrete girderseng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage2288
oaire.citation.issue4
oaire.citation.startPage2272
oaire.citation.titleStructural Concrete
oaire.citation.volume22
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameFernandes
person.givenNamePaulo
person.identifier.ciencia-idF41A-AFFE-B165
person.identifier.orcid0000-0002-5644-8889
person.identifier.scopus-author-id56701925300
relation.isAuthorOfPublication7375e114-0963-49a2-be76-c52dd45c0338
relation.isAuthorOfPublication.latestForDiscovery7375e114-0963-49a2-be76-c52dd45c0338

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The flexural behavior of slender (1/40) long-span precast high-strength concrete girders was experimentally investigated as a competing solution to steel alternatives for highway overpasses. Half-scale specimens were produced using an economical and high-strength (120 MPa) concrete mixture, non-fiber reinforced, designed only with conventional raw materials, currently available at Portuguese precast companies. Two girder specimens were subjected to quasi-static short-term loading up to structural failure in bending. Results have shown the typical behavior of conventional reinforced concrete members in bending, despite the brittle behavior of non-fiber-reinforced high strength concretes. Results also showed acceptable ductility (2.6) and the ability of the girder specimens to experience large deformation without significant softening. An analytical approach, based on plane sections and short-term stress–strain constitutive model recommended by the Eurocode 2 for concrete up to the C90/105 strength class, showed to predict accurately the behavior of girders in bending, both to ultimate and serviceability limit states, including cracking, yielding, maximum loads, and ultimate deflections.
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