Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Spatial variability of explosive blast loading and its effect on damage risks to reinforced concrete buildings
https://orcid.org/0000-0001-6887-6533
Highlights Blast pressure correlation between test gauges is quantified. Spatial variability of explosive blast loads acting on a structure. Structural reliability assessment of progressive collapse for buildings. Threats include terrorist car bombs and accidental detonation of explosive ordnance. Designing against progressive collapse reduced damage risks by over 99%.
Abstract Explosive blast loading is subject to inherent variabilities due to complex interactions between chemical reactions, air particles, fireball and shockwave. Explosive field trials have quantified this variability, and described herein is the probabilistic characterisation of spatial variability of airblast for pressure and impulse. In other words, pressure–time measurements from adjacent (close) gauges are not identical, but correlated based on the distance between adjacent gauges. The degree of correlation is moderate if distance between adjacent gauges is small (i.e., angle between gauges is small where each gauge has the same radial standoff from the charge), and reduces to a weak correlation for gauges spaced much further apart. The effect of spatial variability of airblast on damage and collapse risks is investigated for a 10 storey reinforced concrete building subject to a vehicle borne improvised explosive device (VBIED) attack, and the accidental detonation of explosive ordnance (EO). The structural reliability analysis considered load redistribution for failed columns, dead and live loading variabilities, and blast loading and resistance model errors. It was found that allowing for the spatial variability of airblast decreased progressive collapse probabilities by up to 65% when compared to the case of fully correlated airblast. Designing against progressive collapse using either a threat dependent design or the Alternate Path method reduced damage risks by over 90%, and in many cases by over 99%.
Spatial variability of explosive blast loading and its effect on damage risks to reinforced concrete buildings
https://orcid.org/0000-0001-6887-6533
Highlights Blast pressure correlation between test gauges is quantified. Spatial variability of explosive blast loads acting on a structure. Structural reliability assessment of progressive collapse for buildings. Threats include terrorist car bombs and accidental detonation of explosive ordnance. Designing against progressive collapse reduced damage risks by over 99%.
Abstract Explosive blast loading is subject to inherent variabilities due to complex interactions between chemical reactions, air particles, fireball and shockwave. Explosive field trials have quantified this variability, and described herein is the probabilistic characterisation of spatial variability of airblast for pressure and impulse. In other words, pressure–time measurements from adjacent (close) gauges are not identical, but correlated based on the distance between adjacent gauges. The degree of correlation is moderate if distance between adjacent gauges is small (i.e., angle between gauges is small where each gauge has the same radial standoff from the charge), and reduces to a weak correlation for gauges spaced much further apart. The effect of spatial variability of airblast on damage and collapse risks is investigated for a 10 storey reinforced concrete building subject to a vehicle borne improvised explosive device (VBIED) attack, and the accidental detonation of explosive ordnance (EO). The structural reliability analysis considered load redistribution for failed columns, dead and live loading variabilities, and blast loading and resistance model errors. It was found that allowing for the spatial variability of airblast decreased progressive collapse probabilities by up to 65% when compared to the case of fully correlated airblast. Designing against progressive collapse using either a threat dependent design or the Alternate Path method reduced damage risks by over 90%, and in many cases by over 99%.
Spatial variability of explosive blast loading and its effect on damage risks to reinforced concrete buildings
https://orcid.org/0000-0001-6887-6533
Highlights Blast pressure correlation between test gauges is quantified. Spatial variability of explosive blast loads acting on a structure. Structural reliability assessment of progressive collapse for buildings. Threats include terrorist car bombs and accidental detonation of explosive ordnance. Designing against progressive collapse reduced damage risks by over 99%.
Abstract Explosive blast loading is subject to inherent variabilities due to complex interactions between chemical reactions, air particles, fireball and shockwave. Explosive field trials have quantified this variability, and described herein is the probabilistic characterisation of spatial variability of airblast for pressure and impulse. In other words, pressure–time measurements from adjacent (close) gauges are not identical, but correlated based on the distance between adjacent gauges. The degree of correlation is moderate if distance between adjacent gauges is small (i.e., angle between gauges is small where each gauge has the same radial standoff from the charge), and reduces to a weak correlation for gauges spaced much further apart. The effect of spatial variability of airblast on damage and collapse risks is investigated for a 10 storey reinforced concrete building subject to a vehicle borne improvised explosive device (VBIED) attack, and the accidental detonation of explosive ordnance (EO). The structural reliability analysis considered load redistribution for failed columns, dead and live loading variabilities, and blast loading and resistance model errors. It was found that allowing for the spatial variability of airblast decreased progressive collapse probabilities by up to 65% when compared to the case of fully correlated airblast. Designing against progressive collapse using either a threat dependent design or the Alternate Path method reduced damage risks by over 90%, and in many cases by over 99%.
Spatial variability of explosive blast loading and its effect on damage risks to reinforced concrete buildings
Stewart, Mark G. (Autor:in)
Engineering Structures ; 285
12.01.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Spatial reliability analysis of explosive blast load damage to reinforced concrete columns
| Online Contents | 2015
RESPONSE OF REINFORCED CONCRETE FRAME BUILDINGS TO BLAST LOADING
| British Library Conference Proceedings | 2005
Safety hazard and damage risks for monolithic window glazing subject to explosive blast loading
| British Library Conference Proceedings | 2007
Response of earthquake-resistant reinforced-concrete buildings to blast loading
| Online Contents | 2009