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SBEDS (Single-Degree-of-Freedom Blast Effects Design Spreadsheets) is an Excel-based tool for design of structural components subjected to airblast using single-degree-of-freedom (SDOF) methodology. SBEDS enables the user to choose from 11 common structural components, enter readily available parameters related to material properties and geometry, and directly enter the SDOF properties or allow the workbook to calculate them. Masonry, reinforced concrete, steel, cold-formed metal and wood components are included.

Various support conditions can be selected and either uniformly distributed or concentrated loadings can be modeled. A flexure resistance function is used with compression membrane and/or tension membrane contributions where applicable. P-delta effects on components subject to axial load can also be modeled. SBEDS follows the guidance contained in Army TM 5-1300, “Structures to Resist the Effects of Accidental Explosions”, and Unified Facilities Criteria (UFC) 3-340-01 (FOUO), “Design And Analysis Of Hardened Structures to Conventional Weapons Effects,” as applicable.

SBEDS has been developed by Protection Engineering Consultants senior principal Chuck Oswald and is distributed by the U.S. Army Corps of Engineers.

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