水下爆炸作用下高桩码头损伤特性数值模拟研究  

Numerical simulation research on damage effect of reinforced concrete high-piled wharf under underwater explosion

作　　者：刘靖晗 唐廷 韦灼彬 高屹 李凌锋 张星 LIU Jinghan;TANG Ting;WEI Zhuobin;GAO Yi;LI Lingfeng;ZHANG Xing(Naval Logistics Collage of PLA,Tianjin 300450,China;No.91292 unit of PLA,Baoding 071000,China)

机构地区：[1]海军勤务学院,天津300450 [2]中国人民解放军91292部队,河北保定071000

出　　处：《兵器装备工程学报》2024年第10期53-60,共8页Journal of Ordnance Equipment Engineering

基　　金：学院科研发展基金资助立项项目(2024-17)。

摘　　要：水下爆炸是战时威胁高桩码头保障能力的主要打击手段,为研究高桩码头外侧水下爆炸作用下的毁伤效应,通过有限元软件建立了高桩码头水下爆炸全耦合模型,分析了码头外侧水下接触爆炸和不同爆距爆炸下高桩码头的破坏过程和毁伤现象,探讨了爆炸距离对高桩码头的毁伤效应的影响规律。研究表明:外侧水下爆炸作用下,高桩码头桩基的顶部和炸深区域为主要毁伤部位,爆距直接影响桩基的破坏模式和高桩码头的毁伤程度。当炸药接触桩基爆炸时,临近桩基中部接触炸药区域冲切破坏,桩顶剪切破坏,横梁以及梁板连接区域轻微毁伤,比例爆距小于0.82时,由于桩基的桩顶或桩中断裂而失去承载能力,随着爆距的增加,临近桩基中部由冲切破坏转变为弯曲破坏,桩基顶部由剪切破坏转变为弯剪破坏;当比例爆距大于1.23时,仅临近桩基中部和顶部出现混凝土保护层破碎或塑性变形,横梁与桩基连接区域轻微损伤,不同爆距下桩顶和桩基炸深区域均为易损伤部位。High-piled wharfs are inherently at risk from underwater explosion during war and terrorist attacks.In this paper,a coupling model of high-piled wharf was established to study the damage effect of high-piled wharf subjected to outer underwater explosion.The damage evolution and damage phenomenon were analyzed to explore the impact of blast distance on the damage effect of high-piled wharf.By combining theory and numerical simulations,the damage characteristics of high-piled wharf at different blast distances are clarified.The study of contact underwater explosion,near-field and long-distance underwater explosion shows that the damage to the middle and top of piles is the most serious when the explosive is in the middle of the water.The punching damage in the middle,shear damage at the top of the pile in contact with explosive.The beam and connection of beams and slab are minor damage under contact explosion.The piles near explosive have no load capacity when scaled distance is less than 0.82.The middle of pile changes from punching failure to bending failure and the top of plie changes from shear failure to bending shear failure as blast distance increases.There are only concrete cover damage or plastic deformation in the middle of piles and slight damage in the pile beam connection when scaled distance is more than 1.23.The pile top and blast depth of plie are both vulnerable at different blast distances.

关 键 词：高桩码头 水下爆炸 爆炸距离 接触爆炸 数值仿真 

分 类 号：O383[理学—流体力学]