Cumulative damage effect of concrete gravity dam under underwater multi-bomb explosion
HAN Huaye1, WANG Gaohui1, LU Wenbo1, CHEN Yeqing2, L Linmei2, YAN Peng1
1. State Key Lab of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;
2. Institute of Defense Engineering, Academy of Military Sciences, People’s Liberation Army, Beijing 100850, China
Abstract：Dams are vulnerable to be attacked by multi-bomb underwater explosions, and the damage mechanism and modes of dams under underwater multi-projectile explosion need to be further investigated. For this purpose, a damage analysis model of concrete gravity dams subjected to multi-bomb underwater explosions is established. The dynamic response characteristics and damage modes of concrete gravity dams under single attack, sequential attacks of multiple bombs, and simultaneous attacks of multiple bombs, are discussed. The influence of multi-bomb underwater explosions on the accumulated damage of concrete gravity dams is investigated. The damage mechanism and spatial distribution characteristics of concrete gravity dams subjected to multi-bomb underwater explosions are revealed. At the same time, the ratio of cracking depth is proposed as the damage index for concrete gravity dams to underwater explosion. The damage level of concrete gravity dams is suggested. The damage effects of concrete gravity dams under single and multi-bomb underwater explosions are quantitatively evaluated. The results show that the damage level of the dam is mainly slight when subjected to single attack. However, the dam is seriously damaged by multiple attacks, and the damage was the most serious when subjected to sequential attacks of multiple bombs.
Key words: concrete gravity dam; multi-bomb underwater explosion; cumulative damage effect; damage mechanism; damage index
韩华烨1，王高辉1，卢文波1，陈叶青2，吕林梅2，严鹏1. 水下多弹爆炸打击下混凝土重力坝的累积毁伤效应研究[J]. 振动与冲击, 2022, 41(13): 172-179.
HAN Huaye1, WANG Gaohui1, LU Wenbo1, CHEN Yeqing2, L Linmei2, YAN Peng1. Cumulative damage effect of concrete gravity dam under underwater multi-bomb explosion. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(13): 172-179.
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