【摘要】 根据钢筋混凝土介质在内部爆炸载荷作用下毁伤破坏特性,利用LS-DYNA程序流固耦合算法,使用能够反映拉伸破坏的Tayler-Chen-Kuszmanul(TCK)和反映压缩破坏的Holmqust-Johnson-Cook(HJC)材料模型,通过建立分离式钢筋混凝土有限元模型,进行了钢筋混凝土在内部爆炸载荷作用下毁伤破坏效应的数值计算分析.数值模拟能够很好地模拟钢筋混凝土内部爆炸时中心爆炸空腔压缩面和自由面的拉伸层裂破坏及漏斗坑形成过程,且与试验结果和理论计算吻合较好.同时,由于钢筋的增强和止裂作用,钢筋混凝土中爆炸漏斗坑成阶梯型,且其破坏范围远小于混凝土介质.更多还原

【Abstract】 Based on the reinforced concrete breakage behavior under internal blasting loading, the liquid-solid coupled method of LS-DYNA, the Tayler-Chen-Kuszmanul(TCK) and Holmquist-Johnson-Cook(HJC) model respectively in describing the tension and compression damage to simulate the reinforced concrete blasting crater with the separate reinforced concrete(RC) finite element model. The numerical simulation results described the RC breakage and the blasting crater, namely the center blasting cavity compression and the free surface tension spalling, found to be in agreement with the experimental and theoretical results. Due to the rebar reinforcing and crack restraining effects, the blasting crater in reinforced concrete is of a ladder model and its size is much smaller than that in the concrete medium.更多还原