Nonlinear Concurrent Multiscale Modeling of Concrete

Nonlinear Concurrent Multiscale Modeling of Concrete

Rodrigues, Eduardo A.; Manzoli, Osvaldo L.; Maedo, Michael A.; Bittencourt, Túlio N.

Full Article:

In this work a concurrent multiscale analysis of concrete is presented, in which two distinct scales are considered: the mesoscale, where the concrete is modeled as a heterogeneous material and the macroscale that treats the concrete as a homogeneous material. The mesostructure heterogeneities are idealized as three phase materials composed by the coarse aggregates, mortar matrix and the interfacial transition zone (ITZ). Special continuum finite elements with high aspect ratio with a damage constitutive model are used to describe the complex nonlinear behavior due to propagation of cracks, which is conducted by crack initiation in the ITZ and propagation to the mortar matrix until macro-crack formation. The numerical simulation of an L-shaped panel is performed to show the ability of the proposed method to predict the behavior of cracks initiation and propagation in the tensile region of the concrete. The numerical results are compared with the experimental ones.

In this work a concurrent multiscale analysis of concrete is presented, in which two distinct scales are considered: the mesoscale, where the concrete is modeled as a heterogeneous material and the macroscale that treats the concrete as a homogeneous material. The mesostructure heterogeneities are idealized as three phase materials composed by the coarse aggregates, mortar matrix and the interfacial transition zone (ITZ). Special continuum finite elements with high aspect ratio with a damage constitutive model are used to describe the complex nonlinear behavior due to propagation of cracks, which is conducted by crack initiation in the ITZ and propagation to the mortar matrix until macro-crack formation. The numerical simulation of an L-shaped panel is performed to show the ability of the proposed method to predict the behavior of cracks initiation and propagation in the tensile region of the concrete. The numerical results are compared with the experimental ones.

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DOI: 10.5151/matsci-mmfgm-041-f

Referências bibliográficas

• [1] 1. J.F. Unger, S. Eckardt, Multiscale modeling of concrete. Archives of Computational Methods in Engineering: (2011) 18 341-393.
• [2] 2. V. P. Nguyen, O. Lloberas-Valls, M. Stroeven, L. J. Sluys, Homogenization-based multiscale crack modelling: From micro-diffusive damge to macro-cracks. Compt. Methods Appl. Mech. Engrg.: (2011) 200 1220-1236
• [3] 3. O. Lloberas-Valls, D.J. Rixen, A. Simone, L. J. Sluys, Multiscale domain decomposition analysus of quasi-brittle heterogeneous materials. International Journal for NUmerical Methods in Engineering (2012) 89 1337-1366

Como citar:

Rodrigues, Eduardo A.; Manzoli, Osvaldo L.; Maedo, Michael A.; Bittencourt, Túlio N.; "Nonlinear Concurrent Multiscale Modeling of Concrete", p-22-25. In: Proceedings of the 13th International Symposium on Multiscale, Multifunctional and Functionally Graded Materials [=Blucher Material Science Proceedings, v.1, n.1]. São Paulo: Blucher, 2014.
ISSN 23589337, DOI 10.5151/matsci-mmfgm-041-f