Análise numérica de estruturas de concreto com fibras utilizando mecânico do dano
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Data
2014-08-21
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Universidade Federal de Goiás
Resumo
The work is a contribution to the mechanical numerical modeling of concrete structures with
steel fibers using constitutive models based on Damage Mechanics behavior. The same,
presents the formulation of a model proposed Damage admits that the concrete as initially
isotropic elastic material, but with the evolution of the damage process, the material exhibits
plastic deformations, anisotropy and bimodularidad induced damage. The incorporation of
fibers in the modeling is performed through a homogenization procedure. The constitutive
model for the concrete as well as the homogenization technique for dealing with the case of
fiber concrete are implemented on a structural analysis program bar finite element laminated
in layers. The parametric identification of the constitutive model together with the proposed
homogenization is carried out using experimental results from the literature. Finally,
numerical analysis of reinforced concrete beams reinforced with steel fibers and subjected to
bending are conducted to assess the applicability of the constitutive model considered in this
work. An attempt is thus contribute to the study of the deformation of fibrous concrete beams
in service, in order to aggregate results and discussions in a future proposal of Brazilian
technical standard for this type of structure.
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JÚNIOR, W. M. P. Análise numérica de estruturas de concreto com fibras utilizando mecânico do dano. 2014. 157 f. Dissertação (Mestrado em Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2014.