Shear behaviour of UHPFRC
Ultra-high performance fibre reinforced concrete (UHPFRC) combines high strength concrete with reinforcement provided by embedded steel fibres. Superior strength, ductility and durability properties can lead to lighter structures. However, reduced cross section dimensions leave minimal space for traditional shear reinforcement, so the overall shear resistance depends on that of the concrete matrix alone. Therefore, understanding the shear behaviour of UHPFRC without transverse reinforcement is vital.
This research seeks to determine how best to exploit the remarkable properties of UHPFRC. An experimental study into the shear behaviour of beams made from UHPFRC was undertaken. Digital Image Correlation (DIC) was utilised to better analyse the evolution of shear cracks and to quantify the ductility of shear failures. The results are being compared with existing predictive models to help inform when the use of UHPFRC is advantageous.
