Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
FE-Modelling of cover splitting due to corrosion by use of inner softening band
Abstract The splitting of concrete covers due to the expansive action of corrosion has been investigated by a finite element method (FEM) based on an element-embedded crack concept called the inner softening band. Fictive cross-sections, with and without transverse reinforcement, were studied. The concrete composition (plain and fibrous high-strength concrete) and the cover thickness were varied. The model produced credible fracturing behaviour in concrete covers and explained the mechanical origin of the cracks. For cover thicknesses less than two times the bar diameter, fibres do not seem to have any significant effect on occurrence of splitting cracks. However, fibres are effective to arrest the opening of arisen splitting cracks and to redistribute the strains to other cracks. Hence, fibres may postpone or prevent a total spalling of concrete covers. A larger cover is necessary not only to prolong the initiation period, but also for the fibres (2 volume-%) to be effective beyond occurrence of corrosion induced cover cracks.
FE-Modelling of cover splitting due to corrosion by use of inner softening band
Abstract The splitting of concrete covers due to the expansive action of corrosion has been investigated by a finite element method (FEM) based on an element-embedded crack concept called the inner softening band. Fictive cross-sections, with and without transverse reinforcement, were studied. The concrete composition (plain and fibrous high-strength concrete) and the cover thickness were varied. The model produced credible fracturing behaviour in concrete covers and explained the mechanical origin of the cracks. For cover thicknesses less than two times the bar diameter, fibres do not seem to have any significant effect on occurrence of splitting cracks. However, fibres are effective to arrest the opening of arisen splitting cracks and to redistribute the strains to other cracks. Hence, fibres may postpone or prevent a total spalling of concrete covers. A larger cover is necessary not only to prolong the initiation period, but also for the fibres (2 volume-%) to be effective beyond occurrence of corrosion induced cover cracks.
FE-Modelling of cover splitting due to corrosion by use of inner softening band
Noghabai, K. (Autor:in)
1999
Aufsatz (Zeitschrift)
Englisch
FE-Modelling of cover splitting due to corrosion by use of inner softening band
| British Library Online Contents | 1999
FE-Modelling of cover splitting due to corrosion by use of inner softening band
| Springer Verlag | 1999
FE-Modelling of cover splitting due to corrosion by use of inner softening band
| Springer Verlag | 1999
SCIENTIFIC REPORTS - FE-Modelling of cover splitting due to corrosion by use of inner softening band
| Online Contents | 1999
Computational Modelling of Bond Using the Inner Softening Band Approach
| British Library Conference Proceedings | 1996