爆炸荷载作用下内衬钢板的混凝土组合结构的局部效应分析

ANALYSIS OF LOCAL EFFECTS ON STEEL-BACKED CONCRETE COMPOSITE STRUCTURES UNDER BLAST LOADING

内衬钢板被广泛应用于军事工程的加固改造 ,以增强结构的防震塌局部破坏能力。但由于在爆炸荷载作用下内衬钢板的混凝土组合结构的局部破坏机理尚未完全搞清 ,因此本文利用以前建立的层状波动计算模型分析对比了有无钢板加固时混凝土中的应力变化情况 ,进一步研究了内衬钢板后组合结构在爆炸荷载作用下的防震塌破坏机理 ,并分析了混凝土钢板组合结构在爆炸荷载作用下的局部受力行为和破坏形态 。

Backing steel plates anchored to the inside face of concrete structures was widely introduced to harden military engineering structures to improve their anti-scabbing capacity. However, the local damage mechanism of the steel-backed concrete composite structures under blast loading is not well known. This paper analyzed the stress change in concrete with and without steel spall plate contrastively utilizing the former layer wave model. Also, the anti-scabbing damage mechanism of the concrete steel composite structures under explosive attack was studied, emphasizing on the effects of steel spall plate. The local behaviour and failure modes of composite structures were analyzed to provide theoretical guidance for engineering design.