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为了研究冲击波和破片联合作用下钢筋混凝土柱的抗爆性能,应用有限元分析软件ANSYS/LS-DYNA对近爆作用下钢筋混凝土柱的损伤过程及破坏机理进行数值模拟分析,同时将冲击波单独作用、破片单独作用、二者联合作用下钢筋混凝土柱的动力响应进行了对比。结果表明:近距离爆炸作用下,冲击波先于破片达到柱子,柱子在冲击波作用下产生一定损伤,在此基础上又受到破片群的侵彻而呈现弯曲破坏;柱位移响应达到最大值的时间主要由破片作用控制;破片群对柱的破坏远大于冲击波对柱的破坏,冲击波与破片联合作用效应大于任一个单独作用效应,且大于二者单独作用时的线性叠加,在抗爆设计中应当考虑破片效应及联合作用。
In order to study the antiknock performance of reinforced concrete columns with shock waves and fragments, the finite element analysis software ANSYS / LS-DYNA was used to simulate the damage process and failure mechanism of reinforced concrete columns under near explosion. At the same time, , Fragment alone, the dynamic response of reinforced concrete columns under the combined effect of the two were compared. The results show that under the action of short-range explosion, the shock wave reaches the column ahead of the fragment and the column produces some damage under the action of shock waves. On the basis of this, the column breaks through by the fragment group and the bending failure occurs. The time when the column displacement response reaches the maximum Which is controlled by the action of fragments; the destruction of the columns by the fragments group is far greater than that of the shock waves, the combined effect of shock wave and fragments is greater than either of the individual effects and greater than the linear superposition of the two when acting alone, which should be considered in antiknock design Fragmentation and joint effects.