Investigate Concrete Gravity Dam Under Single And Repeated Earthquake Event With Different Water Level
DOI:
https://doi.org/10.15282/construction.v5i2.12213Keywords:
Concrete gravity dam, Incremental Dynamic Analysis (IDA), Single and repeated earthquake event, Different dam height, Different water levelAbstract
Concrete gravity the massive structure that plays a significant role in the community. The Incremental Dynamic Analysis (IDA) was performed to develop the IDA curve for the concrete gravity dam, considering dam height and water level variations in response to single and repeated earthquake events. Using the Koyna dam's material properties, a nonlinear numerical analysis model is developed in AB QUS. Five ground motions were converted to the response spectrum and scaled according to the developed elastic response spectrum to match the characteristics of the ground motion to the soil type. IDA curves were generated to illustrate the damage states at various ground motion intensities. For the 50 m dam with full and half water height, the average maximum crest displacement is 8.91 mm, 25.13 mm and 9.71 mm, 34.71 mm respectively. For the 100 m dam with full and half water height, the average maximum crest displacement at the yielding and ultimate states is 24.44 mm, 46.09 mm and 41.65 mm, 72.99 mm respectively. It shows that the higher dam receives significantly greater damage during earthquakes. Subsequently, dams with lower water level experienced more serious damage as PGA increased. Furthermore, the dam received greater destruction due to repeated earthquakes than a single earthquake event.
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