Sheet retrofit systems for concrete slabs for blast mitigation
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[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Various ductile sheet materials are currently used to retrofit existing concrete wall systems to mitigate the effects of external blast. Sheet retrofits can increase the strength and ductility of the wall, and also provide a means of fragmentation control. To develop blast design guidelines for sheet blast-retrofits, it is first necessary to develop static resistance functions which are experimentally verified. Static resistance functions were developed for various types of sheet retrofits and a reinforced concrete slab using a mechanics of materials approach. The individual models for the sheet and reinforced concrete slab were then combined to develop a static resistance function for the concrete-sheet retrofit systems. A series of full scale quasi-static tests were conducted using a hydraulic loading tree to experimentally verify the analytical models. The following types of thin sheeting were examined: steel, rubber, polyurea, polypropylene composite, and a polymer-fiber composite sheet.