Age-Dependent Lattice Discrete Particle Model for Quasi-Static Simulations

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Abstract:

For decades, concrete plays an important role worldwide as a structural material. Construction planning and reliability assessment require a thorough insight of the effects that determine concrete lifetime evolution. This study shows the experimental characterization as well as the results of subsequent aging simulations utilizing and coupling a Hygro-thermo-chemical (HTC) model and the Lattice Discrete Particle Model (LDPM) with aging effects for concretes at various early ages. The HTC component of the computational framework allows taking into account any form of environmental curing conditions as well as known material constituents and predicts the level of concrete maturity. Mechanical response and damage are captured by the well-established LDPM, which is formulated in the framework of discrete meso-scale constitutive models. The chemo-mechanical coupling is accomplished by a set of aging functions that link the meso-scale material properties to an effective aging degree, accounting for cement hydration, silica fume reaction, polymerization, and temperature effects. After introducing the formulations the framework is applied to experimental data of 3 standard low and higher strength concretes. Investigated tests include two types of unconfined compression, Brazilian splitting, three-point-bending, and wedge splitting. Following the model calibration the framework is validated by purely predictive simulations of structural level experimental data obtained at different ages for the same concretes.

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1090-1097

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September 2016

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[1] G. Di Luzio and G. Cusatis. Hygro-thermo-chemical modeling of high performance concrete. I: Theory. Cem Concr Compos 31 (5), 301-308, (2009).

DOI: 10.1016/j.cemconcomp.2009.02.015

Google Scholar

[2] G. Di Luzio and G. Cusatis. Hygro-thermo-chemical modeling of high performance concrete. II: Numerical implementation, calibration, and validation. Cem Concr Compos 31 (5), 309-324, (2009).

DOI: 10.1016/j.cemconcomp.2009.02.016

Google Scholar

[3] Boumakis, I., Marcon, M., Wan, L., Wendner, R. (2015). Creep and Shrinkage in Fastening Systems. CONCREEP 2015, Vienna, Austria.

DOI: 10.1061/9780784479346.079

Google Scholar

[4] Abdellatef, M., Alnaggar, M., Boumakis, G., Cusatis, G., Di-Luzio, G., Wendner, R. (2015). Lattice Discrete Particle Modeling for coupled concrete creep and shrinkage using Solidification Microprestress Theory. CONCREEP 2015, Vienna, Austria.

DOI: 10.1061/9780784479346.022

Google Scholar

[5] G. Cusatis, D. Pelessone, and A. Mencarelli. Lattice discrete particle model (LDPM) for failure behavior of concrete. I: Theory. Cement Concrete Composites, 33(9), 881-890, (2011).

DOI: 10.1016/j.cemconcomp.2011.02.011

Google Scholar

[6] G. Cusatis, D. Pelessone, and A. Mencarelli. Lattice discrete particle model (LDPM) for failure behavior of concrete. II: Calibration and validation. Cem Concr Compos, 33(9), 891-905, (2011).

DOI: 10.1016/j.cemconcomp.2011.02.010

Google Scholar

[7] Wan, L., R. Wendner, L. Benliang, and G. Cusatis (2015). Experimental and computational analysis of the behavior of ultra-high performance concrete at early age. J Cem Concrete Composites (in review) arXiv pre-print 1509. 07801.

DOI: 10.1016/j.cemconcomp.2016.08.005

Google Scholar

[8] A. Hillerborg, M. Modeer, P.E. Petersson, Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements, Cem. Concr. Res. 6 (1976) 773–782.

DOI: 10.1016/0008-8846(76)90007-7

Google Scholar