A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Abstract This paper presents, first, a synthesis of the research work carried out at LCPC on the dynamic behaviour of concrete structures, and second, the studies which remain to be performed in response to professional needs. The main advances of this research can be summarized as follows:-For strain rates less or equal to 1 $ s^{−1} $, an increase in material strength is related to viscous phenomena due to the presence of free water in the nanopores of concrete hydrates. This increase is independent of the water/cement ratio of the concrete. For strain rates equal to or greater than 10 $ s^{−1} $, inertia forces are mainly responsable for increasing strength.-Two numerical modellings are being implemented in the finite-element code CESAR-LCPC: the first is a visco-elastoplastic degrading model with viscous hardening; the second is a discrete probabilistic viscous cracking model. These models take into account the physical mechanisms observed and analyzed during the experimental studies. Further experimental and theoretical studies of the dynamic behaviour of the rebar/concrete interface appear as a priority for the future.
Abstract This paper presents, first, a synthesis of the research work carried out at LCPC on the dynamic behaviour of concrete structures, and second, the studies which remain to be performed in response to professional needs. The main advances of this research can be summarized as follows:-For strain rates less or equal to 1 $ s^{−1} $, an increase in material strength is related to viscous phenomena due to the presence of free water in the nanopores of concrete hydrates. This increase is independent of the water/cement ratio of the concrete. For strain rates equal to or greater than 10 $ s^{−1} $, inertia forces are mainly responsable for increasing strength.-Two numerical modellings are being implemented in the finite-element code CESAR-LCPC: the first is a visco-elastoplastic degrading model with viscous hardening; the second is a discrete probabilistic viscous cracking model. These models take into account the physical mechanisms observed and analyzed during the experimental studies. Further experimental and theoretical studies of the dynamic behaviour of the rebar/concrete interface appear as a priority for the future.
Strain rate effects in concrete structures: The LCPC experience
Rossi, P. (author)
1997
Article (Journal)
English
Strain rate effects in concrete structures: The LCPC experience
| Springer Verlag | 1997
Strain rate effects in concrete structures: the LCPC experience
| British Library Online Contents | 1997
Strain rate effects in concrete structures: The LCPC experience
| Online Contents | 1997
| British Library Conference Proceedings | 1997
| British Library Conference Proceedings | 1996