Protective effect of polymer layer on reinforced concrete slabs under an underwater contact explosion

ZHAO Xiaohua; LIU Shucan; FANG Hongyuan; SUN Jinshan; SHI Mingsheng

doi:10.11883/bzycj-2023-0033

Volume 43 Issue 12

Dec. 2023

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Article Navigation > Explosion And Shock Waves > 2023 > 43(12): 125102

ZHAO Xiaohua, LIU Shucan, FANG Hongyuan, SUN Jinshan, SHI Mingsheng. Protective effect of polymer layer on reinforced concrete slabs under an underwater contact explosion[J]. Explosion And Shock Waves, 2023, 43(12): 125102. doi: 10.11883/bzycj-2023-0033

Citation:

ZHAO Xiaohua, LIU Shucan, FANG Hongyuan, SUN Jinshan, SHI Mingsheng. Protective effect of polymer layer on reinforced concrete slabs under an underwater contact explosion[J]. Explosion And Shock Waves, 2023, 43(12): 125102. doi: 10.11883/bzycj-2023-0033

Citation:

ZHAO Xiaohua, LIU Shucan, FANG Hongyuan, SUN Jinshan, SHI Mingsheng. Protective effect of polymer layer on reinforced concrete slabs under an underwater contact explosion[J]. Explosion And Shock Waves, 2023, 43(12): 125102. doi: 10.11883/bzycj-2023-0033

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Protective effect of polymer layer on reinforced concrete slabs under an underwater contact explosion

doi: 10.11883/bzycj-2023-0033

ZHAO Xiaohua^{1, 2, 3
,},
LIU Shucan^{1, 4
,
,},
FANG Hongyuan¹,
SUN Jinshan^{2, 3},
SHI Mingsheng¹

1.
Yellow River Laboratory, Zhengzhou University, Zhengzhou 450001, Henan, China
2.
State Key Laboratory of Precision Blasting Engineering, Jianghan University, Wuhan 430056, Hubei, China
3.
Hubei Key Laboratory of Blasting Engineering, Jianghan University, Wuhan 430056, Hubei, China
4.
Yalong River Hydropower Development Company Ltd., Chengdu 610066, Sichuan , China

Received Date: 2023-02-08
Rev Recd Date: 2023-11-05

Available Online: 2023-11-06

Publish Date: 2023-12-12

Abstract

Abstract

In order to study the anti-explosion protection performance of porous polymers on underwater concrete structures, underwater explosion experiments were carried out on reinforced concrete slabs with a polymer protective layer, and an ordinary reinforced concrete slab was set as a comparing subject. A fully coupled model of underwater explosion of reinforced concrete slab with polymer protective layer was established by the AUTODYN finite element program, while the reliability of the proposed model was verified by the comparison of the calculatied results with experimental ones. Thus, the propagation characteristics of explosion load in water and the damage results of the structure can be better simulated by this model. In addition, the effect of the front steel plate on the enhancement of the protection performance of the polymer layer was further analyzed by numerical simulation. The front steel plate can evenly exert the pressure generated by the explosion load on the inner core layer, so that the polymer layer can display a better energy-absorbing effect. Taking the mid-span residual displacement of the reinforced concrete slab as an index, the influences of the amount of detonating charge and the layer thickness ratio of the composite structure on the underwater protection effect of the polymer layer are analyzed parametrically. The results show that the damage degree of the concrete structure under underwater explosion can be reduced by the polymer protective layer; arranging the steel thin plate on the outside of the polymer layer can improve the energy-absorbing effect of the polymer layer and provide better protection to the reinforced concrete slab; and the protection effect is the best when the ratio of the polymer layer to the front steel plate layer thickness is 20. The research results can provide a reference for the subsequent studies and application of polymer materials in the protection of underwater engineering structures.
- underwater explosion,
- polymer,
- composite structure,
- reinforced concrete slab,
- protective performance

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References

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