遮弹层震塌碎块对成层式结构顶板的冲击破坏效应

为了弄清采用空气分配层情况下遮弹层的震塌碎块冲击结构顶板引起的混凝土板的整体动力响应和局部破坏效应,利用系统能量平衡原理对冲击的整体响应进行分析,并利用有限元方法模拟了碎块与靶体的碰撞过程.结果表明:震塌碎块的冲击对混凝土板的破坏效应以局部破坏为主,冲击造成的结构整体作用可以忽略不计;板内设置钢筋网可以有效地减缓顶板结构内部裂缝的产生和背表面震塌的发生,顶板背表面粘贴钢板可以有效阻止板的震塌破坏.

Damage effect on top plate of layered structure under impact of falling mass from blast layer

For investiga te o n the dy namic response and local damag e o f to p plate of structure under impact o f the falling mass f rom blast layer o n condition of ai r dist ributio n layer. The who le respo nse of the st ructure w as analy zed by the theory of sy stem energy balance, a nd the falling mass impacting the ta rg et w as simulated by the FEM method. The result show s tha t the local damage of the concrete plate is predominant under the impact of the falling mass, the dynamic response of the who le st ructure could be neglected. The steel net embedded into the concrete plate can prohibi t the emerg ence and develo pment o f the inner cracks in th e co ncrete pla te and the falling dow n of th e concrete o f back surface. The steel plate sticked on the back of the top plate can prohibit the damag e of the co ncrete plate efficiently