Debris Throw from Overloaded Concrete Structures at Internal Detonation under Shock, Blastimpulse and Gaspressure
Abstract
The presentation belongs to the effort to get a PC based program to predict the debris throw in case of an accidental explosion in aboveground ammunition storage houses. Concrete structures will be overloaded by internal detonation. Overloading results in catastrophic failure and debris throw. Depending on the loading density and the charge arrangement 3 different fragmentation processes arise: (1) Local composite shock overloading causes a spall crater, scabbing and penetration; (2) Areal blastimpulsive overloading causes shear and punching failure; (3) Volumetric gaspressure overloading blows the structure up and causes bending failure. Any of the processes results in debris throw. The mass and shape of debris as well as the launch velocity and launch angles will be different. The available DISPRE2 database is valid for gaspressure overloading at loading density Q/V < 1 kg/m3. It must be extended to cover composite shock overloading situations at loading densities Q/V > 8 kg/m3. Experiments were done in the DPM program (Debris Program Meppen, 1995) with unreinforced concrete slabs to demonstrate overloading mechanisms. A videofilm on the DPM program is part of the presentation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1996
- Accession Number
- ADA498664
Entities
People
- Gerhard H. Guerke