Underwater anti-explosion mechanism and damage grade prediction of different corrugated steel-concrete slab composite structures

CAO Kelei; FU Qiaofeng; ZHAO Yu

doi:10.11883/bzycj-2023-0366

Volume 44 Issue 6

Jun. 2024

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Article Navigation > Explosion And Shock Waves > 2024 > 44(6): 063102

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CAO Kelei, FU Qiaofeng, ZHAO Yu. Underwater anti-explosion mechanism and damage grade prediction of different corrugated steel-concrete slab composite structures[J]. Explosion And Shock Waves, 2024, 44(6): 063102. doi: 10.11883/bzycj-2023-0366

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Underwater anti-explosion mechanism and damage grade prediction of different corrugated steel-concrete slab composite structures

doi: 10.11883/bzycj-2023-0366

CAO Kelei^1
,,
FU Qiaofeng²,
ZHAO Yu^{1, 2}

1.
College of Water Conservancy, North China University of Water Resources and Hydropower, Zhengzhou 450046, Henan, China
2.
College of Civil Engineering and Transportation, North China University of Water Resources and Electric Power, Zhengzhou 450045, Henan, China

Received Date: 2023-10-09
Rev Recd Date: 2024-01-26

Available Online: 2024-03-06

Publish Date: 2024-06-18

Abstract

Abstract

In order to explore the underwater anti-explosion mechanism of different corrugated steel-concrete slab composite structures, the damage process of concrete slab under underwater contact explosion was simulated by smoothed particle hydrodynamics and finite element method (FEM-SPH), and the validity of the numerical method was verified by comparing with the experimental results. The FEM-SPH method was used to explore the damage process and failure mode of the wall panel under different protection schemes, to reveal the underwater explosion-proof mechanism, and to construct the prediction curve of the damage grade of the wall panel. The results show that the simulation results are in good agreement with the experimental results, which verifies the effectiveness of the simulation method. Under different protection schemes, the damage range of the wall panel with 12 mm thick corrugated steel composite structure (T-12), 75^o angle corrugated steel composite structure (A-75) and 70 mm corrugated steel composite structure (WH-70) is 83%, 81.6% and 82.5% lower than that of the unreinforced wall panel, respectively. In the composite structure, the explosion shock wave propagates to the corrugated steel in the form of incident wave and then propagates in the structure in the form of transmitted wave and reflected wave. When the transmitted wave reaches the lower surface of the corrugated steel, part of the shock wave will continue to propagate to the wall panel, while the remaining shock wave is reflected to form reflected longitudinal wave and reflected transverse wave, which further attenuates the transmitted shock wave acting on the wall panel to achieve the effect of wave clipping and energy absorption. The prediction curve can directly evaluate the influence of explosive amount and wave height change of corrugated steel in composite structure on the damage grade of wall panel.

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