FraMCoS 6 2007 Catania, Italy

SFRC bending behaviour at high temperatures: An experimental investigation

Steel fibre reinforced concrete (SFRC) is increasingly considered as a profitable replacement for diffused reinforcement like welded steel mesh, especially for thin cross sections. In this case fire becomes a very important condition in the design. Previous experimental research showed…

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Year 2007
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Abstract

Steel fibre reinforced concrete (SFRC) is increasingly considered as a profitable replacement for diffused reinforcement like welded steel mesh, especially for thin cross sections. In this case fire becomes a very important condition in the design. Previous experimental research showed the benefits in fire resistance of steel fibres when structural elements are bent. A more complete mechanical characterization of the mate- rial, when exposed to high temperature, is here presented. The research was instrumental to validate the fire design approach suggested in the recent Italian National Recommendations (CNR-DT 204/06) for design of fibre reinforced concrete structures. Particular attention is given to the reliability of a linear softening consti- tutive law proposed for uniaxial tension.