Evaluation of the Behavior of Concrete Gravity Dams under Shock Waves Resulted from the Explosion in the Reservoir

Document Type : Research Article

Authors

Azad University, Damavand branch

Abstract

The present study evaluates the behavior of concrete gravity dam structures against the hydrodynamic pressure of the shock wave produced by the explosion in the dam reservoir. To this end, several arbitrary points are selected as lower, middle, upper elevations at the height of the dam, and the explosives are placed at 10, 20 and 30 meters’ horizontal distances. Numerical analysis was carried out under various explosive locations in the dam reservoir. Finally, the cracking profiles of the dam were extracted and the probable cracking areas of the dam under various explosive loads were determined By comparing the crack profile obtained from the analysis of the various states of the explosive loads. It was concluded that the shock wave from the explosion in the middle elevations and near the floor of the dam had more destructive effects on the location of explosives at altitudes close to the dam of the crest dam so that at the height of zero, the dam floor and the horizontal distance of 10 meters are the most dam failure, as well the areas susceptible to cracks in the heel and neck of the dam are detected. After the explosion is completed, the effects of the explosion remain, and the resulting waves can damage the body of the dam for the next few seconds. The more explosive materials are located at an altitude lower than the bottom of the dam, the change in the crown of the dam was increased so that the rate of change of the displacement of the crest by placing explosives on the floor of the reservoir, i.e. the zero level, as well as the level of 27, is the highest compared to other levels Altitude shows.

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References

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Amirkabir Journal of Civil Engineering
Volume 52, Issue 3
June 2020
Pages 629-640

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