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Computers and Concrete Volume 15, Number 4, April 2015 , pages 515-545 DOI: https://doi.org/10.12989/cac.2015.15.4.515 |
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Computational simulations of concrete behaviour under dynamic conditions using elasto-visco-plastic model with non-local softening |
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Ireneusz Marzec, Jacek Tejchman and Andrzej Winnicki
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| Abstract | ||
| The paper presents results of FE simulations of the strain-rate sensitive concrete behaviour under dynamic loading at the macroscopic level. To take the loading velocity effect into account, viscosity, stress modifications and inertial effects were included into a rate-independent elasto-plastic formulation. In addition, a decrease of the material stiffness was considered for a very high loading velocity to simulate fragmentation. In order to ensure the mesh-independence and to properly reproduce strain localization in the entire range of loading velocities, a constitutive formulation was enhanced by a characteristic length of micro-structure using a non-local theory. Numerical results were compared with corresponding laboratory tests and available analytical formulae. | ||
| Key Words | ||
| concrete; characteristic length; dynamic loading; elasto-plasticity; visco-plasticity; non-local theory; strain localization; viscosity | ||
| Address | ||
| Ireneusz Marzec and Jacek Tejchman: Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Narutowicza Street 11/12, 80-233 Gdańsk, Poland Andrzej Winnicki: nstitute of Building Materials and Structures, Cracow University of Technology, Warszawska Street 24, 31-155 Cracow, Poland | ||