Blast Resistance of Reinforced Concrete Slabs Strengthened with POZD Coated Corrugated Steel

doi:10.12382/bgxb.2022.0024

Abstract

Abstract:

In order to investigate the blast resistance of reinforced concrete slabs strengthened with polyisocyanate oxazodone (POZD) coated corrugated steel, contact explosion tests were conducted on reinforced concrete slabs strengthened with corrugated steel and reinforced concrete slabs strengthened with POZD coated corrugated steel, and the damage characteristics were compared and analyzed. Finite element simulations were performed with LS-DYNA software to study the failure mode and failure characteristics. The influence of the damage effect of charge mass was analyzed. The failure mechanism of the proposed structure was revealed from the perspective of stress wave propagation. The test and numerical results showed that there were four failure modes for reinforced concrete slabs strengthened with POZD coated corrugated steel (The front of the structure produces a crater; the front blasting surface of the structure is cratered, the back blasting surface concrete is spalled and the POZD coated corrugated steel bulge deformation; penetration failure of concrete slab, serious bulging deformation of POZD coated corrugated steel; the entire structure was destroyed throughout), and that coating POZD on the back face (explosion receiving face) of the structure can enhance explosion resistance performance. The findings of this study can provide the basis for practical engineering application and protection engineering.

Key words: contact explosion, POZD coated corrugated steel, blast resistance performance, failure mode

YANG Guangrui, WANG Wei, YANG Jianchao, WANG Jianhui, WANG Xing. Blast Resistance of Reinforced Concrete Slabs Strengthened with POZD Coated Corrugated Steel[J]. Acta Armamentarii, 2023, 44(5): 1374-1383.

Figures/Tables 25

References 25

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序号	模型编号	底面内衬材料/mm		TNT药量/g	破坏状态
序号	模型编号	钢板	POZD	TNT药量/g	破坏状态
1	STB	3	0	3000	波纹钢板破损
2	SPB	3	12	4000	波纹面POZD涂层无破损

序号	模型编号	底面内衬材料/mm		TNT药量/g	破坏状态
序号	模型编号	钢板	POZD	TNT药量/g	破坏状态
1	STB	3	0	3000	波纹钢板破损
2	SPB	3	12	4000	波纹面POZD涂层无破损

试验与数值结果	爆坑直径/mm	冲切道直径/mm	鼓包长径/mm	鼓包短径/mm	鼓包高度/mm
试验结果	300	141	750	300	105
数值结果	280	136	742	289	130

试验与数值结果	爆坑直径/mm	冲切道直径/mm	鼓包长径/mm	鼓包短径/mm	鼓包高度/mm
试验结果	300	141	750	300	105
数值结果	280	136	742	289	130

试验与数值结果	爆坑直径/mm	冲切道直径/mm	鼓包长径/mm	鼓包短径/mm	鼓包高度/mm
试验结果	323	162	963	352	91
数值结果	358	186	997	376	96