RESPONSE AND DAMAGE EVALUATION OF REINFORCED
CONCRETE FRAMES SUBJECTED TO BLAST LOADING
34th Our World in Concrete and Structures (OWICs) - 2009
Ruwan Jayasooriya*, Queensland University of Technology, Australia
David Thambiratnam, Queensland University of Technology, Australia
Nimal Perera, Robert Bird Group and Queensland University of Technology, Australia
Vladis Kosse, Queensland University of Technology, Australia
Blast analysis, Reinforced concrete frames, Finite element analysis, LS DYNA Modelling,
Damage evolution, Residual capacity, Damage indices.
Bomb attacks carried out by terrorists, targeting high occupancy buildings, have become
increasingly common in recent times. Large numbers of casualties and property damage
result from overpressure of the blast followed by failing of structural elements.
Understanding the blast response of multi-storey buildings and evaluating their
remaining life have therefore become important.
Response and damage analysis of single structural components, such as columns or
slabs, to explosive loads have been examined in the literature, but the studies on blast
response and damage analysis of structural frames in multi-storey buildings is limited
and this is necessary for assessing the vulnerability of them. This paper investigates the
blast response and damage evaluation of reinforced concrete (RC) frames, designed for
normal gravity loads, in order to evaluate their remaining life. Numerical modelling and
analysis were carried out using the explicit finite element software, LS DYNA. The
modelling and analysis takes into consideration reinforcement details together and
material performance under higher strain rates.
Damage indices for columns are calculated based on their residual and original
capacities. Numerical results generated in the can be used to identify relationships
between the blast load parameters and the column damage. Damage index curve will
provide a simple means for assessing the damage to a typical multi-storey building RC
frame under an external bomb circumstance.