地下管道结构爆振效应和冲击破坏行为实验

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,爆炸冲击渡可以引起混凝土管道结构的3种破坏行为,即结构破坏、结构和材料耦舍破坏以及材料破坏行为.

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

The dynamic responses o f underg round pipeline st ructures w as studied tog ether w ith the failure behaviors of concrete materials in near-f ield blast condit ions with the small normal w eight of ex plosive charg e. T he blast v ibrat ion ef fects of the under ground pipeline str uctures induced by blast vibrat ion w aves w er e researched; secondly , the failure behaviors of the concr ete materials produced by blast shock w aves w er e investig ated. T he r esul ts show that the blast vibrat io n wav e induces the t ransient r adial compressive deformat ion as w el l as the axial and circumferent ial rigid vibrat ions of the underg round pipel ine st ructur es. In the near-f ield blast test s, when the scale distance chang es, sho ck w aves bring about three ty pes of distinct failure behaviors o f concr ete pipelines that is, the st ructure failure, bo th st ructure and material failur e, and the material failure.