Study on explosion-proof mechanism and damage level prediction of steel fiber reinforced cellular concrete slab in underwater contact explosion

TANG Changxing; CAO Kelei; ZHAO Yu; ZHANG Jianwei; HUANG Jinlin; LYU Mengjie

doi:10.11883/bzycj-2024-0239

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TANG Changxing, CAO Kelei, ZHAO Yu, ZHANG Jianwei, HUANG Jinlin, LYU Mengjie. Study on explosion-proof mechanism and damage level prediction of steel fiber reinforced cellular concrete slab in underwater contact explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0239

Citation:

TANG Changxing, CAO Kelei, ZHAO Yu, ZHANG Jianwei, HUANG Jinlin, LYU Mengjie. Study on explosion-proof mechanism and damage level prediction of steel fiber reinforced cellular concrete slab in underwater contact explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0239

Citation:

TANG Changxing, CAO Kelei, ZHAO Yu, ZHANG Jianwei, HUANG Jinlin, LYU Mengjie. Study on explosion-proof mechanism and damage level prediction of steel fiber reinforced cellular concrete slab in underwater contact explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0239

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Study on explosion-proof mechanism and damage level prediction of steel fiber reinforced cellular concrete slab in underwater contact explosion

doi: 10.11883/bzycj-2024-0239

1.
School of Civil Engineering and Transportation, North China University of Water Resources and Electric Power, Zhengzhou 450045, Henan, China
2.
School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450046, Henan, China
3.
Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510610, Guangdong, China

Received Date: 2024-07-16
Rev Recd Date: 2024-09-05

Available Online: 2024-09-06

Abstract

Abstract

In order to explore the underwater anti-explosion protection effect of steel fiber reinforced cellular concrete materials, the damage process of reinforced concrete slabs under underwater contact explosion was reproduced by the coupling method of smoothed particle hydrodynamics and finite element method (SPH-FEM). The validity of the simulation method was verified by comparing with the experimental results. On this basis, a three-dimensional refined simulation model of 'water-explosive-protective layer-reinforced concrete slab' was established by the SPH-FEM coupling method. The damage evolution process, failure mode and failure mechanism of steel fiber reinforced cellular concrete protective layer with different fiber ratios and reinforced concrete slabs under the influence of different explosive mass were studied, and the damage grade prediction curve of reinforced concrete slabs was constructed. The results show that the numerical simulation results are in good agreement with the experimental results, which verifies the effectiveness of the simulation method. Under the action of underwater contact explosion, the addition of steel fiber reinforced cellular concrete protective layer can effectively reduce the damage degree of protected reinforced concrete slab (RC), and its influence on the damage degree of RC slab decreases first and then increases with the increase of steel fiber volume fraction in the protective layer. Among them, the anti-explosion protection effect of SAP10S15 ratio protective layer is the best. When the amount of explosive increases within a certain range, the SAP10S15 ratio protective layer can still maintain a high proportion of energy consumption and effectively reduce the damage degree of the RC plate. When the amount of explosive is 0.25kg, the damage index of RC slabs strengthened with SAP10S15 protective layer is the most obvious attenuation compared with the unprotected scheme, which is 42.5%, and the damage level is reduced from serious damage to moderate damage. The constructed damage grade prediction curve can directly evaluate the influence of steel fiber volume fraction / explosive amount on the damage grade of RC plate. The above research results can provide reference for the anti-explosion protection design of wading concrete structures.
- underwater contact explosion,
- steel fiber reinforced cellular concrete slab,
- failure mode,
- damage level prediction

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References(32)

References

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