为进一步分析钢筋混凝土在弹丸冲击下的破坏响应,提出了一种在LS-DYNA中利用梁单元表征钢筋并通过节点与混凝土耦合进行钢筋混凝土分离建模的新方法,利用该方法模拟了HanchakSJ关于钢筋混凝土靶的穿甲试验,验证了该数值模拟方法的可靠性。通过改变弹丸侵彻钢筋混凝土靶时的着靶位置,加深了对钢筋在侵彻过程中作用的认识。所确定的数值模拟方法可进一步用于讨论钢筋尺寸、配筋率等参数对侵彻的影响。

To further study the destructive response of reinforced concrete under projectile impact, a novel approach was proposed, in which the link element was chosen as a token of reinforcing steel bar and coupled with concrete element by nodes, for separate modeling of reinforced concrete with LS-DYNA code. To validate the reliability of above numerical methods, numerical simulations on the experiments by Hanchak SJ were conducted and redisplay on projectiles penetrating reinforced concretes. By changing the impact location on the reinforced concrete in simulations, the function of steel bar to penetration resistance emerges expressly. The proposed numerical simulation methods may be further utilized to discuss the effect of size and area density of reinforcing bars on the perforation in reinforced concrete.