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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Modelling of size effects in concrete using elasto-plasticity with non-local softening
Author(s): J. Bobiński, J. Tejchman
Appears on pages(s): 7-35
Keywords: finite element,size effects
Abstract:The paper presents numerical FE-simulations of size effects in quasi-brittle materials like concrete performed under plane strain conditions. The material was modeled within elasto-plasticity with isotropic hardening and softening. A linear Drucker-Prager criterion with a non-associated flow rule was defined in the compressive regime and a linear Rankine criterion with an associated flow rule was adopted in the tensile regime. To ensure the mesh-independence and to capture size effects, both criteria were enhanced in a softening regime by non-local terms to include a characteristic length of micro-structure. FE-analyses of 3 different boundary value problems with respect to a size effect was performed for uniaxial tension, uniaxial compression and three-point bending using various ratios between the characteristic length of microstructure and a concrete specimen size. The numerical results for uniaxial tension and bending were compared with the size effect law by Bazant. In addition, the size effect was numerically investigated in a reinforced concrete beam without stirrups subject to bending, where a perfect bond between concrete and reinforcement was assumed.
Polish Academy of Sciences, International Partner Access.
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