密集弹片群对钢筋混凝土墙体的整体破坏效应分析

常规弹头爆炸后,不仅产生空气冲击波,同时也产生大量高速弹片,形成弹片群,和空气冲击波一样,弹片群也具有极大的破坏杀伤能力。对于建筑结构而言,密集弹片群不仅产生聚集局部破坏效应,还会将能量传递到结构,使之产生整体破坏效应,这是单个弹片与密集弹片群破坏效应的主要区别之一。采用数值模拟的方法对弹片群的整体破坏效应进行了初步研究,描绘钢筋混凝土墙体在弹片群冲击作用下的动态响应过程,揭示弹片群的整体破坏效应,与冲击波在同一量级,在结构设计中不可忽视。

INTEGRAL DAMAGE EFFECT ANALYSIS OF RC WALLS UNDER IMPACT OF DENSE FRAGMENT CLUSTER

As soon as a conventional weapon header detonates,shock waves would be formed,and a large amount of high speed fragments,named as a dense fragment cluster would be produced.To a structure,a dense fragment cluster not only can produce congregating local damage effect,but also can transfer their energy to the structure and induce integral damage that is different from a single fragment.To investigate the integral damage effect of a fragment cluster,a numerical simulation method is adopted to describe the dynamic response process of RC walls under the impact of a fragment cluster and the integral damage effect is analyzed.Comparing with air shock waves,the damage effect of an earth penetration header is similar in magnitade,thus it should not be neglected in engineering design.