Effect of Scaled Distance on the Deflections of Concrete Columns to Near-field Blast Loading: A Numerical Investigation

摘要

This paper presents an investigation on the effect of scaled distances on deflections of reinforced concrete columns under near-field loading using a numerical modelling technique. An explicit analysis tool, AUTODYN, was utilised in this study for modelling the nonlinear dynamic behaviour of reinforced concrete columns. The RHT and the 4340 steel constitutive models were used in modelling concrete and steel reinforcement respectively. The maximum column deflections occurred at points below the mid-height for blast loading from explosions with scaled distance of less than 1.0. The blast loading on the column was highly nonlinear at scaled distance of 0.25 while uniform at a scaled distance of 1.0.