As of the submittal of this paper for publication, only Phase I testing has been completed. The testing for Phase II, II and IV is ongoing and results will be added to the slide presentation portions of this paper. What can be concluded thus far is: 1. Steel rolled shapes and plate can, in general, ductily resist the high strain rate effects and high-order air blast pressure intensities generated from a large arena explosion centered at a relatively short range. 2. Geometries of steel frame moment-resisting connections that, by their very configuration, exhibit overall robustness, redundancy, and discrete beam-to-beam structural continuity, appear to be much more likely to successfully mitigate progressive collapse of a building when subjected to a broadside explosion. 3. The use of air fluid/structure modeling techniques, coupled with parametric HFPB simulations of critical connection components and welds, and the selection of credible non-linear material models, can be used to reliably and cost-effectively predict steel frame and connection behavior when subjected to direct air blast attack.
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