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Computers and Concrete Volume 20, Number 6, December 2017 , pages 689-704 DOI: https://doi.org/10.12989/cac.2017.20.6.689 |
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Experiments and numerical analyses for composite RC-EPS slabs |
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L. Skarzynskia, I. Marzec and J. Tejchman
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| 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. | ||
| Key Words | ||
| composite slabs; elasto-plasticity; damage mechanics; non-local theory; reinforced concrete; EPS foam; diagonal shear crack | ||
| Address | ||
| L. Skarzynskia, I. Marzec and J. Tejchman: Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland | ||