Modelos de fissuração distribuída em vigas de concreto armado pelo método dos elementos finitos

Menin, R.; Trautwein, Leandro Mouta; Bittencourt, Túlio Nogueira

doi:10.1590/s1983-41952009000200004

Cited by 18 publications

(7 citation statements)

References 8 publications

(1 reference statement)

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“…Thus, plane and solid elements with two and three dimensional constitutive models have been used in the computational modeling of lab tests. These constitutive models allow representing the effects of stress state on concrete behavior, leading to an excellent agreement of the numerical and experimental load-displacement curves [11]. However, this approach is not feasible for the analysis of building structures formed by a large number of members (columns and beams) due to the high computational cost, besides the difficulty of geometric modeling and mesh generation.…”

Section: Introductionmentioning

confidence: 99%

Material and geometric nonlinear analysis of reinforced concrete frames

Parente

Nogueira

Neto

et al. 2014

Rev. IBRACON Estrut. Mater.

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The analysis of reinforced concrete structures until failure requires the consideration of geometric and material nonlinearities. However, nonlinear analysis is much more complex and costly than linear analysis. In order to obtain a computationally efficient approach to nonlinear analysis of reinforced concrete structures, this work presents the formulation of a nonlinear plane frame element. Geometric nonlinearity is considered using the co-rotational approach and material nonlinearity is included using appropriate constitutive relations for concrete and steel. The integration of stress resultants and tangent constitutive matrix is carried out by the automatic subdivision of the cross-section and the application of the Gauss quadrature in each subdivision. The formulation and computational implementation are validated using experimental results available in the literature. Excellent results were obtained.

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Section: Introductionmentioning

confidence: 99%

Material and geometric nonlinear analysis of reinforced concrete frames

Parente

Nogueira

Neto

et al. 2014

Rev. IBRACON Estrut. Mater.

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“…This is interesting since it allows the use of certain models from the field of linear elastic fracture mechanics which work reasonably well for a clearly elastic-plastic material, such as those based on the cohesive crack concept [34][35][36]. For instance, in [9] the cohesive crack was successfully used by means of an interface element to reproduce the tensile test on specimens of Material 1, but other approaches such as the embedded cohesive crack [37][38][39] or the smeared crack modelling [40][41][42] could also be proposed.…”

Section: Discussion On the Experimental Datamentioning

confidence: 99%

The Evolution of Internal Damage Identified by Means of X-ray Computed Tomography in Two Steels and the Ensuing Relation with Gurson’s Numerical Modelling

Guerra

Sket

Gálvez

et al. 2019

Metals

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This paper analyzes the evolution of the internal damage in two types of steel that show different fracture behaviors, with one of them being the initial material used for manufacturing prestressing steel wires, and the other one being a standard steel used in reinforced concrete structures. The first of them shows a flat fracture surface perpendicular to the loading direction while the second one shows the typical cup-cone surface. 3 mm-diameter cylindrical specimens are tested with a tensile test carried out in several loading steps and, after each of them, unloaded and analyzed with X-ray tomography, which allows detection of internal damage throughout the tensile test. In the steel used for reinforcement, damage is developed progressively in the whole specimen, as predicted by Gurson-type models, while in the steel used for manufacturing prestressing steel-wire, damage is developed only in the very last part of the test. In addition to the experimental study, a numerical analysis is carried out by means of the finite element method by using a Gurson model to reproduce the material behavior.

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“…Embora o modelo marcasse uma evolução, apresentava inconsistências que foram corrigidas e apresentadas por OZBOLT et al (2001 PI et al (2007), MATA et al (2007), DESMORAT et al (2007a), SRIKANTH et al (2007), FALEIRO et al (2008), DUNDAR et al (2008), PROENÇA e PITUBA (2008), MANZOLI et al (2008), HE et al (2008, VOYIADJIS et al (2008), PAVAN et al (2009), MENIN et al (2009, dentre outros.…”

Section: Breve Históricounclassified

Estudo Comparativo de Modelos de Fissuração Distribuída para Estruturas de Concreto

2013

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ResumoO artigo mostra como a modelagem constitutiva do concreto evoluiu, desde as tentativas iniciais de caracterizar o meio fissurado como contínuo, passando-se pelos modelos de fissuras distribuídas, de dano e de microplanos, até a tendência atual de conceber diferentes modelos segundo um único arcabouço teórico. Uma formulação genérica para os modelos de fissuração distribuída, que inclui os modelos de direção fixa e rotacional, bem como a degradação em tração e em compressão, é apresentada. Usando esta formulação, três modelos são gerados, especificando as leis de degradação. Um estudo comparativo dos modelos, baseado em simulações computacionais de uma viga submetida a cisalhamento em quatro pontos, é apresentado. Os resultados são comparados, entre si e com resultados experimentais, permitindo uma análise critica dos modelos. Palavras-chave: Estruturas de Concreto, Método dos Elementos Finitos, Modelos Constitutivos. AbstractThe article shows how the constitutive modeling of concrete has evolved since the initial attempts to characterize the medium cracked as continuous, moving from smeared cracking, damage and microplane models, until the current tendency to design different models according to a single theoretical framework. A generic formulation for smeared cracking models, including fixed and rotational models, as well as degradation in tension and in compression, is provided. Using this formulation, three models are generated by specifying the laws of degradation. A comparative study of models, based on computer simulations of a beam subjected to shear at four points, is presented. The results are compared, between themselves and with experimental results, providing a critical analysis of the models.

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Modelos de fissuração distribuída em vigas de concreto armado pelo método dos elementos finitos

Cited by 18 publications

References 8 publications

Material and geometric nonlinear analysis of reinforced concrete frames

Material and geometric nonlinear analysis of reinforced concrete frames

The Evolution of Internal Damage Identified by Means of X-ray Computed Tomography in Two Steels and the Ensuing Relation with Gurson’s Numerical Modelling

Estudo Comparativo de Modelos de Fissuração Distribuída para Estruturas de Concreto

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