Title: Mechanical properties of steel fibre reinforced concrete exposed at high temperatures
Author(s): Matteo Colombo, Marco di Prisco, Roberto Felicetti
Appears on pages(s): 475-491
Keywords: Steel fibre reinforced concrete (SFRC), High temperature, Bending, Uniaxial tension, Uniaxial compression, Residual strength, Thermal Damage
Steel fibre reinforced concrete (SFRC) is an advanced cementitious composite where fibres can act 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 has shown the benefits in fire resistance of steel fibres, when structural elements are bent. A careful mechanical characterization of a SFRC used for prefabrication after thermal cycles at high temperature is here presented. Three different tests are considered: four point bending, uniaxial compression and fixed-end uniaxial tension. In the paper the decay of peak and post-cracking strengths versus temperature increase for uniaxial compression, uniaxial tension and bending are discussed.
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