Study on failure zones and attenuation law of stress waves in concrete induced by cylindrical charge explosion

ZHOU Xin; FENG Bin; CHEN Li

doi:10.11883/bzycj-2024-0350

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ZHOU Xin, FENG Bin, CHEN Li. Study on failure zones and attenuation law of stress waves in concrete induced by cylindrical charge explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0350

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ZHOU Xin, FENG Bin, CHEN Li. Study on failure zones and attenuation law of stress waves in concrete induced by cylindrical charge explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0350

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Study on failure zones and attenuation law of stress waves in concrete induced by cylindrical charge explosion

doi: 10.11883/bzycj-2024-0350

Engineering Research Center of Safety and Protection of Explosion & Impact of Ministry of Education, Southeast University, Nanjing 211189, Jiangsu, China

Received Date: 2024-09-18
Rev Recd Date: 2024-12-19

Available Online: 2024-12-20

Abstract

Abstract

In blast-resistant structural design for conventional weapons, previous studies on blast-induced stress waves in solid media have predominantly focused on soil and rock media (i.e., ground shock issues), whereas research on the propagation and attenuation laws of stress waves in concrete remains relatively limited. Based on the KCC constitutive model in conjunction with the multi-material ALE (MMALE) algorithm, the propagation laws of stress waves in concrete induced by cylindrical charge explosion were numerically investigated. Firstly, the applicability of the constitutive model parameters and numerical algorithm were validated by comparing the results with the existing experiments. Subsequently, the peak stress was employed as a criterion to delineate the explosive damage zones in the concrete surrounding the charge. Additionally, the attenuation laws of explosion stress waves in each damage zone were discussed. Finally, the effect of burial depth was taken into further considered, and a formula for calculating the peak stress in concrete induced by cylindrical charge explosion was established. It was found that the attenuation patterns of blast-induced stress waves differ significantly in each explosion failure zone. The stress waves in the near-field zone (quasi-fluid and crushing zones) demonstrates a more rapid attenuation rate compared to that in the mid-field zone (transition and fracture zones). Furthermore, an increase in the aspect ratio of the cylindrical charge leads to an acceleration in the attenuation of the normal peak stress. Moreover, the established formula for calculating the peak stress of blast-induced stress waves enables accurate and rapid determination of the normal peak stress generated by cylindrical charges with varying geometries and burial depths, which can be served as a valuable reference for blast-resistant design of concrete structures.
- concrete,
- cylindrical charges,
- failure zones,
- explosion stress waves,
- peak stress

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References(49)

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