库前水位对混凝土重力坝抗爆安全性能的影响

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Abstract There are signs of modern wars, through the early warning discharge not only can effectively improve the antiknock safety performance of dams, but also can reduce the loss of dams failure risk. The strain rate effect under blast load is taken into consideration in the establishment of gravity dam fully coupled analysis model based on dynamic analysis platform. The damage characteristics and antiknock safety performance of concrete gravity dams subjected to underwater explosion shock loading in normal water level and dead water level were analyzed contrastively. The dynamic response characteristics, damage development process and the characteristics of spatial distribution of concrete gravity dams under different water level were analyzed for the early warning discharge condition at the same time. The results indicate that, for concrete gravity dam, with the reduction of water level before dam, damage range of dam decrease gradually, and that the antiknock safety performance of dam improved remarkably when the water level before dam below the change in downstream slope.

Key words： concrete gravity dam water level before dams antiknock safety performance fully-coupled model underwater explosion damage evolution

Received: 31 March 2015 Published: 15 July 2016

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	Articles by authors
	LI Qi
	WANG Gao-hui?
	LU Wen-bo
	CHEN Ming

Cite this article:

LI Qi,WANG Gao-hui?,LU Wen-bo, et al. Influence of water level on the antiknock safety performance of concrete gravity dam[J]. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(14): 19-26.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2016/V35/I14/19

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