A finite element approach for predicting the ultimate rotation capacity of RC beams

dc.contributor.authorRodrigues, Eduardo A.
dc.contributor.authorManzoli, Osvaldo L. [UNESP]
dc.contributor.authorBittencourt, Túlio N.
dc.contributor.authorBitencourt Jr., Luís A.G.
dc.contributor.authorDos Prazeres, Plínio G.C.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:29:58Z
dc.date.available2014-05-27T11:29:58Z
dc.date.issued2013-07-15
dc.description.abstractThis paper presents a numerical approach to model the complex failure mechanisms that define the ultimate rotational capacity of reinforced concrete beams. The behavior in tension and compression is described by a constitutive damage model derived from a combination of two specific damage models [1]. The nonlinear behavior of the compressed region is treated by the compressive damage model based on the Drucker-Prager criterion written in terms of the effective stresses. The tensile damage model employs a failure criterion based on the strain energy associated with the positive part the effective stress tensor. This model is used to describe the behavior of very thin bands of strain localization, which are embedded in finite elements to represent multiple cracks that occur in the tensioned region [2]. The softening law establishes dissipation energy compatible with the fracture energy of the concrete. The reinforcing steel bars are modeled by truss elements with elastic-perfect plastic behavior. It is shown that the resulting approach is able to predict the different stages of the collapse mechanism of beams with distinct sizes and reinforcement ratios. The tensile damage model and the finite element embedded crack approach are able to describe the stiffness reduction due to concrete cracking in the tensile zone. The truss elements are able to reproduce the effects of steel yielding and, finally, the compressive damage model is able to describe the non-linear behavior of the compressive zone until the complete collapse of the beam due to crushing of concrete. The proposed approach is able to predict well the plastic rotation capacity of tested beams [3], including size-scale effects.en
dc.description.affiliationPolytechnic School University of São Paulo (EPUSP) Department of Structural and Geotechnical Engineering, São Paulo-SP
dc.description.affiliationState University of São Paulo (unesp) Department of Civil Engineering, Bauru-Sp
dc.description.affiliationUnespState University of São Paulo (unesp) Department of Civil Engineering, Bauru-Sp
dc.format.extent1575-1583
dc.identifier.citationProceedings of the 8th International Conference on Fracture Mechanics of Concrete and Concrete Structures, FraMCoS 2013, p. 1575-1583.
dc.identifier.lattes7901652737291917
dc.identifier.orcid0000-0001-9004-7985
dc.identifier.scopus2-s2.0-84879901933
dc.identifier.urihttp://hdl.handle.net/11449/75982
dc.language.isoeng
dc.relation.ispartofProceedings of the 8th International Conference on Fracture Mechanics of Concrete and Concrete Structures, FraMCoS 2013
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectDamage model
dc.subjectNonlinear analysis
dc.subjectReinforced concrete
dc.subjectRotation capacity
dc.subjectSize-scale effects
dc.subjectDrucker-prager criterions
dc.subjectFinite-element approach
dc.subjectPlastic rotation capacity
dc.subjectReinforced concrete beams
dc.subjectTension and compression
dc.subjectConcrete beams and girders
dc.subjectConcrete buildings
dc.subjectConcrete construction
dc.subjectConcretes
dc.subjectCracks
dc.subjectForecasting
dc.subjectFracture mechanics
dc.subjectTrusses
dc.subjectFinite element method
dc.titleA finite element approach for predicting the ultimate rotation capacity of RC beamsen
dc.typeTrabalho apresentado em evento
unesp.author.lattes7901652737291917[2]
unesp.author.orcid0000-0001-9004-7985[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Baurupt
unesp.departmentEngenharia Civil e Ambiental - FEBpt

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