Experimental study of shock-accelerated liquid layers

Meekunnasombat, P.; Oakley, Jason; Anderson, Mark; Bonazza, Riccardo

doi:10.1007/s00193-006-0039-9

Cited by 8 publications

(1 citation statement)

References 10 publications

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“…Moreover, construction materials must be selected for specific structural applications, considering both the structure and the backfill around it. Therefore, a number of new materials and methodologies for blast mitigation, such as porous materials (Levy et al, 1993; Radulescu and Lee, 2002; Teodorczyk and Lee, 1995; Tian et al, 2016; Wu and Zhou., 2011; Zhu et al, 2010), solid particles (Britan et al, 2001; Wagner et al, 2012), waver sheet (Meekunnasombat et al, 2006), concrete wall (Hao and Hao, 2014; Li et al, 2015; Lin and Ashraf, 2017), and water barrier (Chen et al, 2016), have been proposed and studied by researchers. It is much more meaningful to propose a new structural layout with traditional material, such as steel and concrete, to mitigate the blast loads (Whitney, 1996), considering the economic and technical benefits.…”

Section: Introductionmentioning

confidence: 99%

Blast mitigation effect of the layered concrete structure with an air gap: A numerical approach

Chen

Fang

et al. 2018

International Journal of Protective Structures

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A novel layered concrete structure with an air gap was proposed to resist explosion attacks from terrorist bombings or conventional weapons. The proposed layered structure potentially benefits mitigating the blast wave induced from detonation in the predamaged concrete shelter layer by projectile penetration, because the wave impedance between air and concrete material is far different. To quantitatively evaluate the blast mitigation effects and reveal the blast-resistant mechanism, a fine numerical model of the proposed layered structure was built in LS-DYNA, in which trinitrotoluene explosive was detonated in predamaged concrete shelter at different depths. The developed model was validated by field tests of concrete slab under contact explosion. Failure mode of concrete shelter and pressure time histories on the protective structure layer were captured and compared. The distinct blast mitigation effect of the proposed layered structure was demonstrated. A parametric study on the perforation limit, height, and residual depth of concrete shelter was also performed. The calculated results revealed that trinitrotoluene explosive detonated at the impact perforation limit of concrete shelter by projectile penetration is a dangerous critical condition that may cause negative effects on blast mitigation. The blast mitigation rates can always exceed 99%, as long as the concrete shelter is not blasted to perforation. A fitting formula to obtain a higher blast mitigation rate in guiding the design of a layered concrete structure with an air gap was put forward.

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