RC structures subjected to combined blast and fragment impact loading: A state-of-the-art review on the present and the future outlook

Goswami, Abhiroop; Thiagarajan, Ganesh; Adhikary, Satadru Das

doi:10.1016/j.ijimpeng.2022.104355

Cited by 8 publications

(1 citation statement)

References 23 publications

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“…The considerations in the matter of explosions in contact with structures arose the need for improving the strength of structures against impact loads, such as explosive loads, in addition to the dynamic and static loads while designing structures (Houari et al 2021;Nguyen et al 2019;Savaş et al 2021). Within this scope, numerous studies have recently investigated explosive loads and structural elements via various field tests in the literature (Abbas et al 2019;Al-Shaarbaf, Al-Azzawi, and Abdulsattar 2018;Goswami, Ganesh, and Das 2022;Hanifehzadeh et al 2021;Liu et al 2022;Maazoun et al 2019;Peng et al 2022;Tarlochan 2021;Wei, Li, and Wu 2020). In such tests, various difficulties emerged due to high economic costs, long preparation periods, risks of damaging data collection tools during tests, and specialized permissions to conduct explosion tests have emerged.…”

Section: Introductionmentioning

confidence: 99%

An experimental study on the blast responses of hollow core concrete slabs to contact explosions

Savaş

Bakır²

2022

rdlc

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Measures taken against preventing damages in structures against explosive load are a popular matter of investigation among researchers. Generally, numerous studies were conducted on reinforcement materials for outer surfaces, reinforcement design, and utilizing fibers produced from various materials. In this study, a hollow-core slab was manufactured with concrete, which had a regular strength, and a design that discharged the explosive energy upon contact explosion via the hollow cores of the slabs and prevented the redirection of the explosive energy to the area below the slabs was investigated. Because the hollow-core slab in the study did not have any lateral reinforcement, the utilization of the tensile strength of the concrete proved advantageous. For this purpose, in the experimental tests of the study, contact explosions were conducted on hollow-core slabs with hollow diameters of 14 cm for each core. Before the explosion tests, the TNT equivalent of 910gr explosive was determined by performing the TNT equivalent tests. In the explosion tests of prepared hollow core concrete slabs, 125 gr, 250 gr, 375 gr, and 500 gr dynamites were used as the explosive materials. In conclusion, the explosive loads that the slabs could withstand were calculated and various slabs with distinctive hollow-core diameters were determined depending on the amount of the explosives.

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Section: Introductionmentioning

confidence: 99%

An experimental study on the blast responses of hollow core concrete slabs to contact explosions

Savaş

Bakır²

2022

rdlc

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Numerical analysis of the local damage of RC beams under close‐in explosions based on the calibrated Karagozian & Case (K&C) concrete model

Xu,

Liu,

Huang

et al. 2024

Structural Concrete

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Limited research has been carried out to investigate the local damage features of reinforced concrete (RC) beams under close‐in explosions. To better capture the local damage features of rectangular cross‐sectional RC beams, a numerical study on the RC beams subjected to close‐in explosions based on the calibrated Karagozian & Case (K&C) concrete model was conducted in LSDYNA. First, a systematic calibration of the K&C model for concrete was performed in the single‐element numerical analysis. Calibration of the K&C model consists of parameter determination for the new strength surfaces, modification of the damage function to better feature the tensile behavior of concrete, elimination of the element size effect by introducing an element size factor and determination of the scaled damage factors. The new strength surfaces are verified and determined through both the approximation calculation method and the parameter fitting method. And the damage function was modified by reducing the termination of λ to better characterize the brittleness of concrete and feature the tensile failure. A comparison between the numerical results and the corresponding experimental results demonstrates that the calibrated K&C model and established FEM model of RC beams subjected to close‐in explosions can well characterize the local damage features of RC beams. On this basis, a further parameter analysis on the factors influencing the local damage response of RC beams was conducted by considering reinforcement details (stirrup spacing and longitudinal reinforcement diameter) and charge details (charge mass and aspect ratio). Results show that the close‐in explosions destroyed the concrete corners in the blast surface with shear stress first and the side shear failure of concrete corners weakens the concrete core strength and contributes to the greater loss of concrete core. Rear spalling damage was initially caused by the bond failure between the tensile longitudinal reinforcement and the surrounding concrete. Furthermore, increasing stirrup spacing, tensile longitudinal reinforcement diameter, and charge mass contribute to the increase in local damage sizes.

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Near-field multiple-blast resistance of G‑HPC sandwich walls incorporated with metallic tube core

Yuan,

Xu,

Yang

et al. 2024

Archiv.Civ.Mech.Eng

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RC structures subjected to combined blast and fragment impact loading: A state-of-the-art review on the present and the future outlook

Cited by 8 publications

References 23 publications

An experimental study on the blast responses of hollow core concrete slabs to contact explosions

An experimental study on the blast responses of hollow core concrete slabs to contact explosions

Numerical analysis of the local damage of RC beams under close‐in explosions based on the calibrated Karagozian & Case (K&C) concrete model

Near-field multiple-blast resistance of G‑HPC sandwich walls incorporated with metallic tube core

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