Retrofitting of Reinforced Concrete Beam-Column via Steel Jackets against Close-in Detonation

This paper presents results from simulation, in comparison to findings from full-scale blast trials of Reinforced Concrete Beam-Column test specimens. 2 numerical approaches were adopted. First method was a 2-stage approach which involved applying segment pressure loadings, derived from Computational Fluid Dynamics (CFD) ®calculations, on LS-DYNA Lagrangian models to predict structural response. Second method was the use of *Load_Blast_Enhanced keyword to couple empirical blast loads to air domain in Arbitrary Lagrangian-Euler (ALE) environment for direct LS-DYNA Fluid-Structure Interaction (FSI) computations. Grid Convergence Index (GCI) principles were used to check adequacy of mesh refinement studies.