水下爆炸冲击作用下混凝土闸坝的失效模式分析  

Failure Mode Analysis of Concrete Gate Dams Subjected to Shock Loading of Underwater Explosion

作　　者：朱祖国 王高辉[2] 许昌[3] 萧燕子[3] 

机构地区：[1]长江水利委员会长江勘测规划设计研究院,湖北武汉430010 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [3]黄河勘测规划设计有限公司,河南郑州450003

出　　处：《水利与建筑工程学报》2015年第5期36-40,共5页Journal of Water Resources and Architectural Engineering

基　　金：中央高校基本科研业务费专项资金项目(2042015kf0001)

摘　　要：水下爆炸冲击荷载具有短持时、强峰值等特性,其破坏能力较之静态荷载和地震荷载要强的多,会对水工建筑物造成严重的破坏。考虑爆炸荷载下的混凝土高应变率效应,采用显式动力有限元LS-DYNA构建了混凝土闸坝厂房坝段水下爆炸全耦合数值模型,对比分析炸药在闸坝进口段库前和内部水下爆炸冲击荷载作用下的大坝破坏特性,研究混闸坝在水下爆炸冲击作用下的失效模式和破坏机理,为混凝土闸坝抗爆性能评估和防护设计提供基础。结果表明水下爆炸冲击荷载作用下混凝土闸坝将发生严重的破坏,且进口段内部爆炸比库前水下爆炸破坏更加严重。The shock loads of underwater explosion mainly presents the characteristics of short duration and strong peak pressure ,which cause more serious damage to the hydraulic structure than static and seismic loads .With the considera-tion of high strain rate effect of concrete material under blast loads ,the fully coupled model of the dam section in a con-crete gate dam powerhouse subjected to underwater explosion was established based on the explicit dynamic finite element software LS-DYNA .Numerical simulations were carried out to study the damage characteristics of the entrance structure in the concrete gate dam subjected to external and internal underwater explosion .The potential failure modes and failure mechanism of this dam subjected to shock loads of underwater explosion were investigated .The results will provide a the-oretical basis for the antiknock performance assessment and protective design of concrete gate dams .The results indicate that shock wave loads from underwater explosion will cause serious damage to concrete gate dams .The damage from inter-nal underwater explosion in the entrance structure is more serious than that from external underwater explosion .

关 键 词：闸坝 失效模式 厂房坝段 水下爆炸 全耦合模型 

分 类 号：TV66[水利工程—水利水电工程] TV642