Steel-UHPC composite castellated beams under hogging bending: Experimental and numerical investigation

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dc.contributor.authorde Oliveira V.M.
dc.contributor.authordos Santos V.B.
dc.contributor.authorRossi A.
dc.contributor.authorBenedito A.V.
dc.contributor.authorKrahl P.A.
dc.contributor.authorMartins C.H.
dc.contributor.authorde Andrade Silva F.
dc.contributor.authorCardoso D.C.T.
dc.date.accessioned2025-04-01T06:17:43Z
dc.date.available2025-04-01T06:17:43Z
dc.date.issued2025
dc.description.abstract© 2025 Elsevier LtdContinuous steel-concrete composite beams provide bending moment redistribution, slight deflection, the capability to cover longer spans and cost-effectiveness. Employing steel alveolar I-sections and Ultra-High-Performance Concrete (UHPC) slabs in these composite beams can significantly dematerialize the structure. Differently from conventional concrete, UHPC slabs are usually thinner, but can still provide restrain and increase buckling capacity of metallic parts, although less effectively when the slab is loaded in tension. The present paper investigates the Web-Post Buckling (WPB) behavior of steel-UHPC composite castellated beams under three-point hogging bending tests for two different patterns, namely Peiner and Anglo-Saxon. The experimental results are used to validate the numerical model and assess the accuracy of the design procedures for predicting these beams' WPB resistance, and a numerical parametric study is also discussed. Both specimens reached failure by WPB coupled with the Vierendeel mechanism (VM). This way, the length of the web openings' hexagon horizontal edge (tee length) influenced the bearing capacity of the castellated beam, in which the specimen with a higher tee length had a lower ultimate load, which was also observed in the numerical parametric study. In addition, the numerical models with the shortest web-post width were more critical for the WPB occurrence. Composite castellated beams with UHPC slabs showed higher initial bending stiffness and ultimate loads than those with NC slabs, even though the WPB and VM phenomenon restricted their bearing capacity. Finally, the procedure from EN 1993–1–13 for WPB resistance prediction provided more conservative results, and the Steel Design Guide 31 overestimated the WPB resistance of castellated beams significantly affected by the VM phenomenon on their ultimate loads.
dc.description.volume331
dc.identifier.doi10.1016/j.engstruct.2025.120012
dc.identifier.issnNone
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/40328
dc.relation.ispartofEngineering Structures
dc.rightsAcesso Restrito
dc.subject.otherlanguageComposite castellated beams
dc.subject.otherlanguageShear capacity
dc.subject.otherlanguageUltra-high-performance concrete
dc.subject.otherlanguageVierendeel mechanism
dc.subject.otherlanguageWeb-post buckling
dc.titleSteel-UHPC composite castellated beams under hogging bending: Experimental and numerical investigation
dc.typeArtigo
local.scopus.citations0
local.scopus.eid2-s2.0-85219092207
local.scopus.subject'Vierendeel' mechanisms
local.scopus.subjectBuckling resistance
local.scopus.subjectCastellated beam
local.scopus.subjectComposite castellated beam
local.scopus.subjectHigh-performance concrete
local.scopus.subjectPostbuckling
local.scopus.subjectShear capacity
local.scopus.subjectUltimate loads
local.scopus.subjectUltra high performance
local.scopus.subjectWeb-post buckling
local.scopus.updated2025-04-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85219092207&origin=inward
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