Measurement of impulse from the close-in explosion of doped charges using a pendulum

Enstock, L.; Smith, P.D.

doi:10.1016/j.ijimpeng.2005.12.005

Cited by 21 publications

(3 citation statements)

References 2 publications

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“…Numerous studies have been conducted to examine the dynamic response of RC columns under both distant and close-in explosion scenarios. Initially, an explosion is typically categorized as a close-in blast event when the scaled distance Z < 1.054 kg/m 1/3 [26] or z < 1.2 kg/m 1/3 [27]. The scaled distance Z is defined as R/W 1/3 , where R represents the stand-off distance or the separation between the center of the explosive charge and the structure, and W denotes the explosive charge mass.…”

Section: Introductionmentioning

confidence: 99%

Blast Loading of Small-Scale Circular RC Columns Using an Explosive-Driven Shock Tube

Rhouma,

Maazoun,

Aminou

et al. 2024

Buildings

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Reinforced concrete (RC) columns, being axial-bearing components in buildings, are susceptible to damage and failure when subjected to blast loading. The failure of these columns can trigger a progressive collapse in targeted buildings. The primary objective of this study is to investigate the failure characteristics of laboratory-scale RC columns subjected to localized blast loading. The columns, with a length of 1500 mm and an outer diameter of 100 mm, are reinforced with 6 mm diameter longitudinal bars and 2 mm diameter steel ties. The blast loading is generated using an explosive-driven shock tube (EDST) positioned in front of the mid-span of the RC columns with a 30 g and 50 g charge. To capture the global response of the RC columns, high-speed stereoscopic DIC is used in addition to LVDTs. Furthermore, an FE model is developed using LS-DYNA R10.0 and validated against the experimental data. The results show that the proposed FE approach is able to reproduce the applied blast loading and the failure characteristics of the columns. The relative difference in column mid-span out-of-plane displacement between the FE model and the average measured data lies below 5%. Finally, the gray correlation method is conducted to assess the influence of various parameters on the blast resistance of the RC columns.

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Section: Introductionmentioning

confidence: 99%

Blast Loading of Small-Scale Circular RC Columns Using an Explosive-Driven Shock Tube

Rhouma,

Maazoun,

Aminou

et al. 2024

Buildings

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“…In 1993, a group presented an approach that attempted to analytically predict the material damage to an impact [15]. Another research study showed the use of a pendulum device to evaluate the energy and impulse transferred to structures by detonating explosives [16]. In the same way, research about pendulum impact testing was applied to evaluate a specific section of a barrier [17]; tests allowed them to understand the performance of the barrier and when it attained considerable damage.…”

Section: Introductionmentioning

confidence: 99%

Optical Characterization of a Pendular Impact

et al. 2020

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We present a simple but accurate correlation between an experimental characterization and a simple analytical prediction of a wave propagation induced by the impact of a pendulum in a box filled with fine sand; this research is based on optical measurements and was carried out using the digital image correlation technique to determine the motion on the surface of the box visually observed by the reflection of the laser. We suggest that the reaction to the impact in the body will be similar to an equivalent damped mass-spring system, obtaining an average error of 3.67208 × 10 −4 .

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“…Firstly, extensive studies are carried out on the blast loads acting on the structural components when the explosive charges are detonated at short range to a structure ('close-in explosions'). Enstock and Smith [2] used a pendulum to measure the impulse of the blast load induced by the close-in explosion from dropped charges. While Piehler, et al [3] carried out experiments to measure the near-field blast impulse on a structure using blast bar gauge.…”

Section: Introductionmentioning

confidence: 99%

Field Tests on Spalling Damage of Reinforced Concrete Slabs under Close-In Explosions

Shi

Chen

Wang

et al. 2015

International Journal of Protective Structures

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Accidental explosions usually occur near the building structures. In order to protect the building structures against the near explosions, there is an urgent need for the study on the local damage of structural members under close-in explosions. However, the damage mechanism of the structural components under close-in explosions might be quite different from the case of distance explosions. In the case of the close-in explosions, the blast loads acting on the structural components are usually of high reflected peak pressure and concentrate on a local area, causing severe local damage to the structural member. For reinforced concrete (RC) structural members, it is much more complicated that the spalling damage might occur when they are subjected to blast load from close-in explosions. In order to investigate the damage mechanism of typical RC structural members under close-in explosions, field tests are carried out to study the spalling damage of RC slabs under different close-in explosions. The characteristics of the spalling damage of the test specimens are observed and presented. Comparisons are also made and the results show that the spalling damage of RC members under close-in explosions has a basic characteristic of uncertainty. And the increase of the height/diameter ratio of the cylindrical TNT charge will significantly increase the spalling damage degree of the RC slab, although the mass of the TNT charge is unchanged.

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Measurement of impulse from the close-in explosion of doped charges using a pendulum

Cited by 21 publications

References 2 publications

Blast Loading of Small-Scale Circular RC Columns Using an Explosive-Driven Shock Tube

Blast Loading of Small-Scale Circular RC Columns Using an Explosive-Driven Shock Tube

Optical Characterization of a Pendular Impact

Field Tests on Spalling Damage of Reinforced Concrete Slabs under Close-In Explosions

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