Different factors can affect blast response of structural components. Hence, experimental tests could be the best method for
evaluating structures under blast loading. Therefore, an experimental explosion loading has been done on RC members by the
authors. Four RC components, with identical geometry and material, with and without axial load were imposed to air blast.
Observed data of the members’ response under blast loading was used for validation of finite element modeling process using
ABAQUS software. With respect to complexity, limitations, and high costs of experimental tests, analytical studies and software
modeling can be good alternatives. Accordingly, in this paper, the behavior of 6 different models of normal and strengthened
RC columns under blast loading was evaluated using ABAQUS. Strengthening configurations considered here were designed for
enhancing axial capacity of RC columns. Therefore, we can investigate the effectiveness of axial strengthening of column on its blast
resistance capacity and residual axial strength. The considered strengthening methods were different steel jacket configurations
including steel angle, channel, and plate sections. The results showed that retrofitting significantly improves blast performance of
the columns. Moreover, residual strength capacity of the columns strengthened with steel channel is higher than the other models.