STUDY ON STEEL FIBER REINFORCED HIGH STRENGTH CONCRETE SUBJECT TO BLAST LOADING

Scaled explosive tests have been conducted to investigate the performance of steel fiber reinforced high strength concrete (SFRHSC) panels. The volume fractions (Vf ) of steel fibers of SFRHSC ranged from 0 to 3%, and the matrix used was C100. The experiment showed that blast stress waves attenuated obviously in the concrete, and that the degree of attenuation was not closely related to the strength and Vf of SFRHSC. However, with the increase of the Vf , the peak acceleration at the bottom of the concrete panels and the destruction of the panel faces decreased. The experiment also indicated that SFRHSC panels had remarkable antiscabbing properties, which were mainly dependent on the tension strength of SFRHSC. Subjected to the detonation of a certain charge weights, large surface areas of the ordinary concrete panels scabbed, and the fragments flied off in multiple directions, but the SFRHSC panels didn’t scab or only spalled slightly. On the basis of the experiments, a scabbing model for SFRHSC based on the artificial neural network system was established. The theoretical values from the model matched well with the experimental ones.