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Study on air-cushion isolation control of concrete dam and its anti-cracking effect.
- Source :
-
Journal of Vibroengineering . Jun2018, Vol. 20 Issue 4, p1761-1773. 13p. 1 Black and White Photograph, 5 Diagrams, 5 Charts, 4 Graphs. - Publication Year :
- 2018
-
Abstract
- The seismic problem of concrete dams has long been a difficult issue facing academic and engineering researchers. Traditional anti-seismic and isolation measures produce unfavorable results in hydraulic structures. However, the air-cushion seismic isolation technique represents a new development orientation for the anti-seismic method of concrete dams. To study the isolation and anti-cracking effects of the air-cushion, the gas-liquid-solid tri-phase coupling numerical model of the air-cushion isolation control of high arch dams is presented in this paper, in which the cracking behavior of concrete is considered. A 300 m level dam was simulated numerically under three different seismic intensities. The results show that the air-cushion reduces the hydrodynamic pressure significantly. The maximum hydrodynamic pressure is reduced by more than 70 %, and the acceleration of the dam crest is reduced by more than 50 % with a 1 m air-cushion. The reduction in hydrodynamic pressure and dam acceleration increases with increasing seismic intensity. In addition, the air-cushion decreases the cracking range of the dam body effectively. Thus, the isolation effects of the air-cushion are remarkable. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13928716
- Volume :
- 20
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Journal of Vibroengineering
- Publication Type :
- Academic Journal
- Accession number :
- 130439043
- Full Text :
- https://doi.org/10.21595/jve.2017.18739