冲击波和破片联合作用下RC柱的损伤分析

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。

Damage Analysis of RC Column Subjected to Synergistic Effects of Blast Wave and Fragmentation

In order to investigate the anti explosion performance of reinforced concrete (RC) column subjected to combined blast waves and fragments, numerical simulations were carried out for the analysis on the damage process and failure mechanism of reinforced concrete column under close in explosion by using finite element analysis software ANSYS/LS-DYNA. At the same time, the dynamic response of reinforced concrete column under blast waves alone, fragment alone, and the synergistic effect of the two actions were compared. The results show that under the close-in explosion, blast waves come to the column before fragments, while the column with a certain damage occurs bending failure both by impact effect of blast waves and erosions of fragments; the time of the columns peak displacement response is controlled mainly by the fragment effect; damages of the column caused by fragment cluster are far worse than those caused by blast waves, and the synergistic effects of fragments and blast waves are more serious than either separate effects of anyone alone or effects of linear superposition, so the fragments effects and synergistic effects should be considered in the anti explosion design.