A study of the design and calculation method of double-skin steel-concrete shield based on energy approach

WANG Wu; YANG Jun; WANG Anbao; ZHOU Bukui; LI Xiaojun

doi:10.11883/bzycj-2023-0086

Volume 43 Issue 11

Nov. 2023

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WANG Wu, YANG Jun, WANG Anbao, ZHOU Bukui, LI Xiaojun. A study of the design and calculation method of double-skin steel-concrete shield based on energy approach[J]. Explosion And Shock Waves, 2023, 43(11): 114203. doi: 10.11883/bzycj-2023-0086

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WANG Wu, YANG Jun, WANG Anbao, ZHOU Bukui, LI Xiaojun. A study of the design and calculation method of double-skin steel-concrete shield based on energy approach[J]. Explosion And Shock Waves, 2023, 43(11): 114203. doi: 10.11883/bzycj-2023-0086

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A study of the design and calculation method of double-skin steel-concrete shield based on energy approach

doi: 10.11883/bzycj-2023-0086

WANG Wu^{1, 2
,},
YANG Jun^{1
,
,},
WANG Anbao²,
ZHOU Bukui²,
LI Xiaojun²

1.
Department of Civil Engineering, Tsinghua University, Beijing 100084, China
2.
Institute of Defense Engineering, AMS, PLA, Beijing 100036, China

Received Date: 2023-03-09
Rev Recd Date: 2023-04-29

Available Online: 2023-04-28

Publish Date: 2023-11-17

Abstract

Abstract

The calculation method of double-skin steel-concrete shield based on the energy method is discussed. Under the premise of a rigid projectile, the main structures that affect the energy dissipation of projectile penetration are front and rear steel plates, internal concrete, tied bars and distribution layer. In this paper, the energy consumption of steel plate in elastic state, plastic state and plastic membrane state is analyzed. Based on the principle of minimum energy consumption and dimensionless analysis, the energy consumption states of the rear steel plate of different materials and structural dimensions are inversely deduced. Combined with the strength limit condition of concrete, the formula for calculating the comprehensive energy consumption of the rear steel plate considering the plastic deformation and the penetration failure mode is proposed, and the analytical expression for the minimum critical thickness of the rear steel plate is given. The calculation results indicate that the comprehensive energy consumption of the sheet steel plate can reach 4−5 times that of merely considering the penetration effect. In view of the restraint effect of steel plates on both sides of concrete, the current relatively mature formula of concrete penetration energy consumption is modified. Based on the principle of energy conservation, a six-step method for designing double-skin steel-concrete shield is proposed, and the formula for calculating the critical penetration velocity of the projectile is given. The theoretical results are then compared with the existing test data. It indicates that the calculation formulas proposed in this paper are in good agreement with the test results and can provide a scientific guideline for the design of double-skin steel-concrete shield. The main principle of the six-step method is to take a full account of the plastic deformation energy consumption of the rear steel plate and the anti-penetration energy consumption of the front steel plate. This method is beneficial to reduce the thickness of the double-skin steel-concrete shield and improve the protection effect.
- double-skin steel-concrete shield,
- energy approach,
- perforation,
- design and calculation method

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