Performance and modelling of steel fibre reinforced piles under seismic loading

This paper provides test data on the seismic behaviour of steel fibre reinforced concrete (SFRC) piles. Four large-scale specimens are subjected to a combination of constant axial load and alternating cyclic flexure. A similar number of specimens are subjected to alternating cyclic flexure without axial load. Twin-cone fibres and new twin-crimped fibres in weight fraction varying between 40 and 50 kg/m3 are used. ructural ductility and energy absorption capability of SFRC piles are compared with that of reference RC piles in connection with the application of an axial load. These results are used to assess the efficiency of fibres to reinforce concrete piles in seismically active regions. lytical model is developed. The computed load–deflection behaviour is compared with the experimental one and the significance of the uni-axial tension test of SFRC is assessed.