Abstract
ABSTRACT The threats of bomb attacks by criminal organizations and accidental events involving chemical explosives are a danger to the people and buildings. Due the severity of these issues and the need of data required for a safety design, more research is required about explosions and shock waves. This paper presents an assessment of blast wave overpressures using a computational fluid dynamics software. Analyses of phenomena as reflection of shock waves and channeling effects were done and a comparison between numerical results and analytical predictions has been executed, based on the simulation on several models. The results suggest that the common analytical predictions aren’t accurate enough for an overpressure analysis in small stand-off distances and that poorly designed buildings may increase the shock wave overpressures due multiple blast wave reflections, increasing the destructive potential of the explosions.
Highlights
Shock waves and explosion phenomena, especially from high explosives, are useful for mining and for military applications
This paper presents an assessment of blast wave overpressures using computational fluid dynamics software
The results of this paper suggest that the common analytical predictions aren’t accurate enough for an overpressure analysis in small stand-off distances and that poorly designed buildings may increase the shock wave overpressures due multiple blast wave reflections, increasing the destructive potential of the explosions
Summary
Shock waves and explosion phenomena, especially from high explosives, are useful for mining and for military applications. The main objective of protective construction is to improve people and general contents survival probability after a blast event against a facility [1]. These constructions need sufficient ductility and redundancy to prevent progressive collapse [2]. Another important factor in a protective construction is the façade response to the blast loading that significantly affect the structure behavior [3]. A suitable internal layout of a protective building might facilitate the escape of hot gases from an internal explosion and prevent channeling effect due successive shock wave reflections.
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