ADAPTATION OF STEEL FRAMES TO BLAST LOADS

The article investigates the effectiveness of structural solutions for reinforcing steel frames of frames designed to withstand explosive loads. Design approaches for resistance to progressive (disproportionate) collapse are considered. A comparative analysis of options for strengthening and complete replacement of the structure is performed, taking into account the cost of steel, manufacturing and installation work. The features of modeling the explosive effect are considered and the feasibility of transitioning from equivalent quasi-static load to dynamic calculation is substantiated. The influence of the deformation rate on the increase in the yield strength of steel is shown and its value is determined for assessing the bearing capacity and survivability of reinforced elements. Approaches to the rational choice of solutions are formulated, taking into account economic and dynamic factors.

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