Abstract
A coupled finite-element squared ()-framework is formulated and employed for simulation of a transient and coupled moisture-chloride ion diffusion problem in concrete. Simulations are carried out on the macroscale, where the material response is obtained concurrently in the computations by introducing a representative volume element (RVE) in the macroscale quadrature points. The RVE, in turn, contains the mesoscale heterogeneities of concrete in terms of cement paste, aggregates, and interfacial transition zone (ITZ). In this fashion, the RVE comes to serve as a constitutive model for the macroscale. A numerical example is given to show how the transient macroscale diffusion is influenced by the composition of the mesoscale constituents. Parametric studies were carried out with respect to the aggregate content within the RVE, both including and excluding the ITZ, and the coupling parameters of moisture and chloride ions.
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Acknowledgments
This research was financially supported by the Swedish Research Council, which is gratefully acknowledged.
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Published In
Journal of Engineering Mechanics
Volume 141 • Issue 2 • February 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jun 15, 2012
Accepted: Jun 25, 2013
Published online: Jun 19, 2014
Published in print: Feb 1, 2015
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