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Coupled Systems Mechanics Volume 3, Number 1, March 2014 , pages 73-88 DOI: https://doi.org/10.12989/csm.2014.3.1.073 |
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Modelling and numerical simulation of concrete structures subject to high temperatures |
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Lars Ostermann and Dieter Dinkler
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| Abstract | ||
| The paper deals with a model founded on the physical processes in concrete subject to high temperatures. The model is developed in the framework of continuum damage mechanics and the theory of porous media and is demonstrated on selected structures. The model comprises balance equations for heat transfer, mass transfer of water and vapour, for linear momentum and for reaction. The balance equations are completed by constitutive equations considering the special behaviour of concrete at high temperatures. Furthermore, the limitation and decline of admissible stresses is achieved by using a composed, temperature depending crack surface with a formulation for the damage evolution. Finally, the complete coupled model is applied to several structures and to different concrete in order to determine their influence on the high-temperature-behaviour. | ||
| Key Words | ||
| concrete; high temperatures; coupled thermo-mechanical-chemical damage | ||
| Address | ||
| Lars Ostermann and Dieter Dinkler :Institut für Statik, Beethovenstrasse 51, 38106 Braunschweig, Germany | ||
