水下接触爆炸下钢筋混凝土板毁伤模式探究  

Damage mode of reinforced concrete slabs under underwater contact explosion

作　　者：胡锦华 HU Jin-hua(China Railway 16th Bureau Group Beijing Metro Engineering Construction Co.,Ltd.,Beijing 101100,China)

机构地区：[1]中铁十六局集团北京轨道交通工程建设有限公司,北京101100

出　　处：《工程爆破》2022年第3期17-23,共7页Engineering Blasting

基　　金：中铁十六局集团豫机城铁项目基金资助项目(2015 JCCJ SG01)。

摘　　要：为了探究水下接触爆炸下钢筋混凝土板的毁伤破坏模式以及内部配筋的形变特性,利用AUTODYN软件建立了钢筋混凝土板水下接触爆炸全耦合精细模型,并通过水下接触爆炸现场试验,分析了水下接触爆炸荷载冲击下钢筋混凝土板的动态破坏全过程,探究了混凝土板内压力时程变化过程。结果表明:所建仿真耦合模型能够较好地描述水下接触爆炸下的爆炸冲击波传播以及钢筋混凝土板毁伤破坏过程;水下接触爆炸荷载作用下,钢筋混凝土板出现严重的冲切损伤,爆心区域板完全破碎、脱落,混凝土板整体变形较大,且内部配筋出现了较大的形变。In order to study the damage mode of reinforced concrete slabs under underwater contact explosion and the deformation characteristics of internal reinforcing bars,the full coupling fine model of a reinforced concrete slab under underwater contact explosion is established by AUTODYN software.The whole dynamic failure process is analyzed based on the field tests of underwater contact explosion,and the time history change process of pressure in the concrete slab is also explored.The results show that the coupling model can well describe the propagation of shock waves and the damage process of the reinforced concrete slab under underwater contact explosion.Under the underwater contact explosion load,the reinforced concrete slab bears serious punching shear damage,the blasting core areas on the slab are completely broken and fall off,and both the overall concrete slab and the internal reinforcing bars appear large deformation.

关 键 词：钢筋混凝土板 水下接触爆炸 现场试验 数值仿真 破坏模式 

分 类 号：TD235[矿业工程—矿井建设] TU47[建筑科学—结构工程]