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http://dx.doi.org/10.12989/cac.2017.20.6.689

Experiments and numerical analyses for composite RC-EPS slabs  

Skarzynski, L. (Faculty of Civil and Environmental Engineering, Gdansk University of Technology)
Marzec, I. (Faculty of Civil and Environmental Engineering, Gdansk University of Technology)
Tejchman, J. (Faculty of Civil and Environmental Engineering, Gdansk University of Technology)
Publication Information
Computers and Concrete / v.20, no.6, 2017 , pp. 689-704 More about this Journal
Abstract
The paper presents experimental and numerical investigations of prefabricated composite structural building reinforced concrete slabs with the insulating material for a residential building construction. The building slabs were composed of concrete and expanded polystyrene. In experiments, the slabs in the full-scale 1:1 were subjected to vertical concentrated loads and failed along a diagonal shear crack. The experiments were numerically evaluated using the finite element method based on two different constitutive continuum models for concrete. First, an elasto-plastic model with the Drucker-Prager criterion defined in compression and with the Rankine criterion defined in tension was used. Second, a coupled elasto-plastic-damage formulation based on the strain equivalence hypothesis was used. In order to describe strain localization in concrete, both models were enhanced in the softening regime by a characteristic length of micro-structure by means of a non-local theory. Attention was paid to the formation of critical diagonal shear crack which was a failure precursor.
Keywords
composite slabs; elasto-plasticity; damage mechanics; non-local theory; reinforced concrete; EPS foam; diagonal shear crack;
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