水下爆炸深度对码头框架结构损伤的影响

为了探究水下爆炸冲击作用下框架码头的结构损伤,确定最不利起爆位置,结合实际工程结构,建立了水下爆炸和两层码头框架结构的全耦合模型,验证了所用全耦合建模方法以及所采用材料模型的正确性和可靠性,分析了冲击波传至码头结构时不同深度下码头结构的破坏模式。结果表明:利用全耦合方法以及选取RHT混凝土材料模型来研究爆炸冲击下结构损伤破坏是准确的,模拟结果也是可信的。随着爆深的增加,码头结构的损伤破坏由局部损伤变为整体损伤再变为局部损伤。当爆深H=7 m位于码头框架结构一层附近时,结构极易发生因位移过大而导致的整体剪切破坏。

Influence of underwater explosion depth on the damage of wharf frame structure

In order to explore the structural dynamic response of the frame wharf under the impact of underwater explosion and determine the most unfavorable initiation location, a fully coupled model of underwater explosion and two storey wharf frame structure was established by combined the actual engineering structure, which verified the correctness and reliability of the modeling method and material model used. The failure mode of wharf structure under different initiation depths was analyzed. The results show that using the fully coupled method and selecting the RHT concrete material model to study the dynamic response and damage of the structure under the explosion impact is accurate, and the simulation results are also credible. As the explosion depth increases, the damage to the wharf structure changes from local damage to overall damage and then to local damage. When the blasting depth H=7 m and it is located near the first floor of the wharf frame structure, the structure is prone to overall shear failure due to excessive displacement.