Mesoscale approach to modeling concrete subjected to thermomechanical loading

Grassl, P. and Pearce, C. (2010) Mesoscale approach to modeling concrete subjected to thermomechanical loading. Journal of Engineering Mechanics, 136(3), pp. 322-328. (doi: 10.1061/(ASCE)0733-9399(2010)136:3(322))

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Concrete subjected to combined compressive stresses and temperature loading exhibits compressive strains, which are considerably greater than for concrete subjected to compressive stresses alone. This phenomenon is called transient thermal creep or load induced thermal strain and is usually modeled by macroscopic phenomenological constitutive laws which have only limited predictive capabilities. In the present study a mesoscale modeling approach is proposed in which the macroscopically observed transient thermal creep results from the mismatch of thermal expansions of the mesoscale constituents. The mesostructure of concrete is idealized as a two-dimensional three-phase material consisting of aggregates, matrix, and interfacial transition zones. The nonlinear material response of the phases is described by a plasticity interface model. The mesoscale approach was applied to analyze compressed concrete specimens subjected to uniform temperature histories and the analysis results were compared to experimental results reported in the literature.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Grassl, Dr Peter and Pearce, Professor Chris
Authors: Grassl, P., and Pearce, C.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:Journal of Engineering Mechanics
Publisher:American Society of Civil Engineers
ISSN (Online):1943-7889

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