原文传递
Influence of Reservoir Water Levels on the Protective Performance of Concrete Gravity Dams Subjected to Underwater Explosions
| 题名： | Influence of Reservoir Water Levels on the Protective Performance of Concrete Gravity Dams Subjected to Underwater Explosions |
| 其他题名： | ANSYS.2010.AUTODYN user manual version 13.Canonsburg,PA:ANSYS. |
| 正文语种： | 英文 |
| 作者： | Qi Li |
| 关键词： | Concrete gravity dam;Protective performance;Reservoir water level;Underwater explosion;Shock wave propagation |
| 摘要： | Blast loads would cause serious damage to concrete gravity dams, and a possible dam break can lead to a catastrophe in downstream populated areas. Preventing damage to dam structures is of great interest in the blast-resistant design of dams. This paper investigates the influence of reservoir water levels on the protective performance of a typical concrete gravity dam under blast loads. For that purpose, five different reservoir water levels are considered in this study. Because the dam structure may undergo both air and underwater blast loads near the free water surface with the drawdown of the reservoir water level, comparison analyses of the shock wave propagation characteristics of an underwater explosion and an air blast near boundaries are first carried out. The results show that shock wave peak pressures from an underwater explosion near the free water surface are much higher than those from an air blast near the free water surface. To further compare the damage characteristics of concrete gravity dams in these two blast scenarios, a fully coupled numerical approach with combined Lagrangian and Eulerian methods is performed to model the dam-reservoir-foundation system. For a dam subjected to an air blast near the free water surface, there is almost no damage and hence an underwater explosion is mainly investigated. The influence of detonation positions on the degree of damage to a dam subjected to underwater explosions is investigated. The effect of reservoir water levels on the protective performance of a dam is discussed and identified. The results show that protective performance is greatly improved when the reservoir water level is below the change in downstream slope of the dam, which also reduces the loss of downstream areas even when the breaching of the concrete dam occurs. |
| 出版年： | 2018 |
| 论文唯一标识： | P-26Y2018V144N09016 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/(ASCE)ST.1943-541X.0002143 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 144 |
| 期： | 09 |
| 页码： | 211-225 |
相关文献
- Discussion of “Influence of Reservoir Water Levels on the Protective Performance of Concrete Gravity Dams Subjected to Underwater Explosions” by Qi Li, Gaohui Wang, Wenbo Lu, Xinqiang Niu, Ming Chen, and Peng Yan
- Closure to “Influence of Reservoir Water Levels on the Protective Performance of Concrete Gravity Dams Subjected to Underwater Explosions” by Qi Li, Gaohui Wang, Wenbo Lu, Xinqiang Niu, Ming Chen, and Peng Yan
- Blast Performance and Damage Evaluation of High Arch Dams Subjected to Far-Field Underwater Explosions: Consideration of Joints
- Influence of Explosive Shape on the Response of Steel Plates under Blast Loading
- DAMS: Denver Water Hires Contractor for Initial Work on Gross Reservoir Expansion
- Response Spectrum Analysis of Concrete Gravity Dams Including Dam-Water-Foundation Interaction
检索历史
应用推荐
