A high-performance protective structure utilising non-composite steel-concrete-steel (SCS) sandwich panels for protecting buildings and facilities against close-range detonation of VBIEDs and heavy ve-hicle impacts has been developed. Unlike other existing composite sandwich panels, no shear connec-tors between the steel faceplates are utilised to construct protective panels in order to simplify the con-struction process. The concrete core of the panel is included to provide the mass for increased inertia effects, and the steel faceplates are designed to develop tensile membrane resistance at large displace-ment to dissipate impulsive energy. The energy dissipation capability and high ductility of the axially-restrained non-composite SCS panels have been verified through a series of high energy impact tests on scaled panels using the drop hammer facility at UoW. High-fidelity finite element models for the pro-tective barriers were developed and subjected to close range detonation of high explosive using the non-linear explicit dynamics code LS-DYNA. Using the validated modelling techniques, a full-scale blast barrier structure composed of non-composite sandwich panels and steel posts was studies for its performance to provide resistance against close range bomb explosion. It was established that the non-composite SCS barrier construction could provide a highly effective means for protecting critical facili-ties and personnel against effects of an external bomb attack.