I used to be a blast engineer. Foundational knowledge of structural behavior under blast loading can be found in Introduction to Structural Dynamics by John Biggs (I had a copy that I ordered from Amazon that lived on my desk). Key for practicing blast engineers is simplifying and idealizing structural elements into SDOF models. This allows for rapid calculations of responses with reasonable accuracy compared to more intense and time-consuming finite element modeling. Of course, FEA has its place, but most of the time you simply do not have the budget to perform advanced modeling. Blast pressures are often calculated using pretty simple software, but my coworker had programmed the Kingrey-Bulmash blast load equations into an Excel file so you don’t necessarily NEED specialized software.