框架结构建筑物内爆炸冲击波传播规律研究

Study on the propagation characteristics of shock wave in frame construction buildings under internal explosion

为了建立建筑物内部爆炸毁伤效应的评估方法,采用数值计算方法,建立了典型钢筋混凝土框架-砌体墙结构建筑物连续多个房间的有限元模型,开展了典型工况内爆炸作用下迎爆方向砌体墙的连续毁伤效应与房间内冲击波传播规律的研究。结果表明,受不同房间砌体墙破坏形式的影响,内爆冲击波在相邻房间传播方式与起爆房间不同,整体分为两侧绕射波向中心汇聚阶段以及马赫波扩张2个阶段。基于系列工况的计算结果,得到了房间尺寸、爆炸当量和墙体厚度等因素对冲击波传播的影响规律。

In order to establish the evaluation method about internal explosion damage effect of the building,the typical RC frame and masonry wall structure building consecutive room finite element model was established.The continuous damage effect of masonry wall facing blasting surface and the propagation characteristics of shock wave in a room under the action of internal explosion in typical conditions were studied.The results show that the propagation characteristics of internal explosion shock waves in adjacent rooms are different from those in initiation rooms due to the failure modes of masonry walls in different rooms.The propagation modes of internal explosion shock waves in adjacent rooms were divided into two stages:the converging stage of diffractive wave on both sides and the expansion stage of Mach wave.Based on the calculation results of a series of working conditions,the influence of room size,explosion equivalent and wall thickness on shock wave propagation was obtained.