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Ductility Analysis of RC Beams Considering the Concrete Confinement Effect Produced by the Shear Reinforcement: a Numerical Approach

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Autor(es):
Nogueira, Caio Gorla [1] ; Rodrigues, Isabela Durci [1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Sao Paulo State Univ UNESP FEB, Dept Civil Engn, Sao Paulo - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES; v. 14, n. 13, p. 2342-2372, 2017.
Citações Web of Science: 1
Resumo

Abstract In this paper, a simplified numerical approach to study the influence of the confinement effect provided by transversal reinforcement on the ductility behavior of RC beams in bending is proposed. A unidimensional FEM mechanical model coupled to the Mazars’ damage model to simulate concrete behavior was adopted to assess ductility curvatures at the ultimate limit state. The confinement effect was incorporated to the numerical model through a calibration process of the damage internal parameters, based on the Least Square Method and an analytical law proposed by Kent and Park (1971). Several numerical analyses were carried out considering different designs of RC beams according to a parametric study varying the neutral axis position, concrete compressive strength and the volumetric transversal reinforcement ratio. The obtained results showed the importance of the amount of transversal reinforcement on the ductility behavior, increasing the ductility factor even for the cases with inappropriate neutral axis position. (AU)

Processo FAPESP: 16/14450-6 - Estudo da ductilidade em vigas de concreto armado: abordagem analítica com base na ABNT NBR 6118:2014 e numérica via método dos elementos finitos com comportamento não linear dos materiais
Beneficiário:Isabela Durci Rodrigues
Modalidade de apoio: Bolsas no Brasil - Iniciação Científica