地下管道结构爆振效应和冲击破坏行为实验

Experimental Investigations on effects of blast vibration and behaviors of impacting failure of underground pipeline structures

通过小当量爆炸实验研究爆源近区地下结构动力响应和材料破坏行为。研究了地下管道结构的爆炸振动效应,分析了混凝土材料在爆炸冲击波作用下的破坏行为。结果表明,爆炸振动波使地下管道结构发生以瞬态径向压缩为主的变形,以及沿轴向和环向两方向的刚体振动响应。在爆源近场随爆炸折算距离变化,爆炸冲击波可以引起混凝土管道结构的3种破坏行为,即结构破坏、结构和材料耦合破坏以及材料破坏行为。

The dynamic responses of underground pipeline structures was studied together with the failure behaviors of concrete materials in near-field blast conditions with the small normal weight of explosive charge.The blast vibration effects of the underground pipeline structures induced by blast vibration waves were researched;secondly,the failure behaviors of the concrete materials produced by blast shock waves were investigated.The results show that the blast vibration wave induces the transient radial compressive deformation as well as the axial and circumferential rigid vibrations of the underground pipeline structures.In the near-field blast tests,when the scale distance changes,shock waves bring about three types of distinct failure behaviors of concrete pipelines that is,the structure failure,both structure and material failure,and the material failure.