J. Phys. IV France
Volume 134, August 2006
EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 133 - 138
Publié en ligne 26 juillet 2006
EURODYMAT 2006 - 8th International Conference on Mehanical and Physical Behaviour of Materials under Dynamic Loading
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 133-138

DOI: 10.1051/jp4:2006134021

An analysis of the propagation of front shock in concrete

P.-L. Hereil and E. Buzaud

Centre d'Études de Gramat, 46500 Gramat, France

Published online: 26 July 2006

The aim of the authors is to model the shock response of concrete structures submitted to the effects of projectile penetration or contact detonation, in a range of pressure levels from 0 to 20 GPa. The limitations of current computers imply the need to homogenize the response of the different constituents of concrete into a single macroscopic model. Though concrete is widely used as a construction material, the knowledge concerning its response under shock loading response remains rather modest. An exhaustive review of the research effort in this field shows that the limited available data is affected by an important dispersion. As a consequence, any general rule correlating the composition of concrete to its shock properties have not yet been evidenced. A simple method to predict the shock Hugoniot of concrete based on a mixture theory is developed considering concrete as a mix of cement hydrates, free water, rock and voids. Experimental results obtained on special concrete compositions are presented. They illustrate the relation between the wave structure and the size of the aggregates, and so, the level of heterogeneity of the composition. Numerical simulations demonstrate the ability of a mesoscopic model to describe this phenomenon, and the failure of the homogenized approach to do so.

© EDP Sciences 2006