Modeling of Combined Impact and Blast Loading on Reinforced Concrete Slabs

Linz, Paolo Del; Fan, S.C.; Lee, Chi King

doi:10.1590/1679-78252516

Cited by 21 publications

(2 citation statements)

References 33 publications

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“…Erosion parameters were included for all materials to remove heavily distorted elements. Based on our previous experience [50], values of 1.2 and 2.0 plastic strain were used for the steel and concrete parts respectively. These high values were chosen so as to only eliminate elements likely to compromise the model execution without affecting the energy transfer from the fragments to the structure.…”

Section: Sample Models Geometrymentioning

confidence: 99%

Effect of cased charges on plain steel and steel-concrete sandwich targets

Rana

Khan

Linz

et al. 2019

Thin-Walled Structures

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Section: Sample Models Geometrymentioning

confidence: 99%

Effect of cased charges on plain steel and steel-concrete sandwich targets

Rana

Khan

Linz

et al. 2019

Thin-Walled Structures

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“…The localized failure of the floor system immediately below the weapon is one of the typical damage types. The combined blast and fragment impact may result in failure of the concrete slab (Del Linz et al, 2016). However, it is announced that failure of reinforced concrete (RC) floor slabs in the RC structure has a significant reducing effect on the blast load induced from contact explosion.…”

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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