基于能量法的双钢板混凝土遮弹层设计计算方法研究  

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

作　　者：王武 杨军[1] 王安宝 周布奎 李晓军 WANG Wu;YANG Jun;WANG Anbao;ZHOU Bukui;LI Xiaojun(Department of Civil Engineering,Tsinghua University,Beijing 100084,China;Institute of Defense Engineering,AMS,PLA,Beijing 100036,China)

机构地区：[1]清华大学土木工程系,北京100084 [2]军事科学院国防工程研究院,北京100036

出　　处：《爆炸与冲击》2023年第11期152-165,共14页Explosion and Shock Waves

摘　　要：为了深入探讨双钢板混凝土结构抗强冲击时后附钢板的耗能方式变化,基于最小耗能原理和无量纲化分析,反推得到了不同材料和结构尺寸下后附钢板耗能状态。结合混凝土强度极限条件,建立了兼顾塑性变形和侵彻贯穿破坏形态的后附钢板综合耗能计算公式以及后附钢板最小临界厚度解析表达式。计算结果表明,薄钢板综合耗能可达仅考虑贯穿效应耗能的4~5倍。基于能量守恒原理,提出了双钢板混凝土遮弹层防贯穿设计六步法,给出了弹体临界贯穿速度和弹体余速计算公式。该计算公式与已有钢板混凝土结构侵彻试验结果吻合较好。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 dou

关 键 词：双钢板混凝土遮弹层 能量法 侵彻贯穿 设计计算方法 

分 类 号：O385[理学—流体力学]