配筋结构对弹丸侵彻过程影响的研究

On the Effect of Steel Bar Configuration on Projectile Penetration Process

本文提出的弹丸侵彻钢筋混凝土的解析模型,既考虑了弹丸侵彻过程中受到的动阻力与静阻力,又考虑了弹丸与钢筋发生碰撞时钢筋对弹丸的直接阻力。该解析模型的计算结果能反映弹丸与钢筋结构的作用过程,与测试数据符合较好。用该模型计算了配筋尺寸、网眼尺寸、配筋结构对侵彻深度、侵彻过程弹丸过载特性的影响。计算结果表明网眼间距越小,弹丸峰值负加速度越大;配筋直径增大,弹丸与钢筋的作用力显著增大,弹丸过载显著增大。

An analytical model for projectile penetration in a semi-infinite reinforced concrete target, which takes into account the dynamic resistance, static resistance as well as the direct resistance due to the impact between steel bar and projectile, is presented in this paper. The model describes th＇e interaction process of projectile with steel bar configuration. Calculation results agree reasonably with the test data. The model was used to analyze the effect of steel bar size, steel bar mesh size and steel bar configuration etc on the penetration depth and the overload effect in penetration process. Computed results indicate that the smaller is the steel bar mesh size, the bigger is the projectile peak value deceleration; along with the increase of steel bar diameter, the action between projectile and steel bar and projectile overload are both obviously enhanced.