Design of ultra-high performance concrete shield against combined penetration and explosion of warheads

CHENG Yuehua; WU Hao; CEN Guohua; ZHANG Yu

doi:10.11883/bzycj-2024-0061

Volume 45 Issue 1

Jan. 2025

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CHENG Yuehua, WU Hao, CEN Guohua, ZHANG Yu. Design of ultra-high performance concrete shield against combined penetration and explosion of warheads[J]. Explosion And Shock Waves, 2025, 45(1): 013301. doi: 10.11883/bzycj-2024-0061

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CHENG Yuehua, WU Hao, CEN Guohua, ZHANG Yu. Design of ultra-high performance concrete shield against combined penetration and explosion of warheads[J]. Explosion And Shock Waves, 2025, 45(1): 013301. doi: 10.11883/bzycj-2024-0061

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Design of ultra-high performance concrete shield against combined penetration and explosion of warheads

doi: 10.11883/bzycj-2024-0061

College of Civil Engineering, Tongji University, Shanghai 200092, China

Received Date: 2024-03-04
Rev Recd Date: 2024-05-11

Available Online: 2024-05-14

Publish Date: 2025-01-01

Abstract

Abstract

Due to the high compressive/tensile strengths and fracture toughness, ultra-high performance concrete (UHPC) has great application potential in protective structures against the attack of earth penetrating weapons. Accurately evaluating the damage and failure and establishing reliable design methods of UHPC shields against the combination of penetration and explosion of warheads can provide a helpful reference for protective structure design and resistance improvement. In this study, combined tests of 105 mm-caliber projectile penetration test and 5 kg TNT explosion test on semi-infinite UHPC target were conducted first. The detailed test data of the projectile and target under penetration and the combined effect of penetration and explosion were recorded. Then, a finite element model of UHPC under penetration and explosion was established. By conducting the numerical simulations of the above conducted test and the existing prefabricated hole charge explosion test on the finite UHPC slab, as well as comprehensively comparing the destroy depth and cracking dimension of the target, the reliability of the established finite element model and the corresponding analysis approach in predicting the damage and failure of UHPC shield against the combination of penetration and explosion of warheads were validated. Finally, the perforation limit and scabbing limit of the UHPC shield under the combination of penetration and explosion of three typical prototype warheads, i.e., SDB, WDU-43/B, and BLU-109/B, were determined and compared with those of normal strength concrete shield. The results show that, the perforation limit and scabbing limit of the UHPC shield against the above three warheads are in ranges of 1.30−2.60 m and 1.70−5.00 m, respectively. The corresponding critical perforation and scabbing coefficients are in the ranges of 1.81−2.17 and 2.46−4.17, respectively. Compared with the normal strength concrete shield, the cracking diameter of the UHPC shield is reduced by 34.4%−42.4%. The perforation limit and scabbing limit are reduced by 7.1%−31.6% and 39.7%−52.8%, respectively. The present work can provide an analysis method and reference for the resistance evaluation and design of the UHPC shield.
- ultra-high performance concrete,
- shield,
- penetration,
- explosion,
- protective design

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References

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