Email this article Assessment of stresses and vibration behavior of concrete gravity dam under fluctuating hydrostatic force
DOI: https://doi.org/10.20528/cjcrl.2025.01.001
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Dam structure contributes to the socio-economic development of a country but zero probability of failure of such structure is a design concern. Hence, it is essential to monitor the dam condition under the fluctuating reservoir water and the vibration effect. In this investigation, four different cases of the reservoir depths are adopted to numerically analyze the hydrostatic and modal (free-vibration) behavior of a three-dimensional (3D) gravity dam. The impact of fluctuating reservoir water and uplift pressure on the dam's internal stresses (direct, principal, shear, and Von Mises) are evaluated to examine the location of maximum stress concentration. Under these cases, the maximum displacement along the longitudinal and vertical directions is explored. It can be revealed that case 4 (without tail-water) induces the maximum displacement on the top crest level and the peak normal stress concentrated at the heel region, respectively. This case also experienced the lowest time-period and largest frequency. In comparison to cases 2, 3, and 4, case 1 exhibit the largest crest level displacements along the x-direction that are 26%, 49%, and 86% higher, respectively. Compared to case 1, the normal stresses along the x-direction declined by 51.58%, 68.74%, and 58.25%, respectively for cases 2, 3, and 4. It can be revealed that the frequency is directly related, while the time-period is inversely proportional to the mode-shapes. Overall, this study envisages a comprehensive understanding of the dam’s performance, providing critical data to inform design decisions, safety assessments, and performance improvements.
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References
Abraham M, Kuriakose B, Kuruvilla R (2017). Static analysis of gravity dams considering foundation-structure interaction. Applied Mechanics and Materials, 857, 237-242.
Ali MH, Alam MR, Haque MN, Alam MJ (2012). Comparison of design and analysis of concrete gravity dam. Natural Resources, 3(1), 31004.
Amarnath CR, Shashidhar T (2020). Study on backwater effect due to Polavaram Dam Project under different return periods. Water, 12(2), 576.
Asghari E, Taghipour R, Bozorgnasab M, Moosavi M (2018). Seismic analysis of concrete gravity dams considering foundation mass effect. KSCE Journal of Civil Engineering, 22, 4988-4996.
Burman A, Reddy BV, Maity D (2008). Seismic analysis of concrete gravity dams considering foundation flexibility and nonlinearity. The 12th International Conference of International Association for Computer Methods and Advances in Geomechanics, Goa, India.
Ghaedi K, Jameel M, Ibrahim Z, Khanzaei P (2016). Seismic analysis of Roller Compacted Concrete (RCC) dams considering effect of sizes and shapes of galleries. KSCE Journal of Civil Engineering, 20, 261-272.
Ghaemian M, Noorzad A, Mohammadnezhad H (2019). Assessment of foundation mass and earthquake input mechanism effect on dam–reservoir–foundation system response. International Journal of Civil Engineering, 17, 473-480.
Jafari SR, Khiavi P (2019). Parametric study of the modal behavior of concrete gravity dam by using finite element method. Civil Engineering Journal, 5(12), 2614-2625.
Khosravi S, Heydari MM (2015). Design and modal analysis of gravity dams by ANSYS parametric design language. Walailak Journal of Science and Technology, 12(2), 167-180.
Li M C, Guo XY, Shi J, Zhu ZB (2015). Seepage and stress analysis of anti-seepage structures constructed with different concrete materials in an RCC gravity dam. Water Science and Engineering, 8(4), 326-334.
Mohammadnezhad H, Ghaemian M, Noorzad A (2019). Seismic analysis of dam-foundation-reservoir system including the effects of foundation mass and radiation damping. Earthquake Engineering and Engineering Vibration, 18, 203-218.
Pandimani, Rao YD, Krishna IG (2024). FE modeling for ultimate behavior predictions of RC beam. Asian Journal of Civil Engineering, 25(1), 477-493.
Pandimani, Sankar TS, Priyatham BPRVS, Ramkumar BAV (2024). Evaluation of SSI impact on the structural performance of RC buildings. Asian Journal of Civil Engineering, 25(2), 1295-1307.
Punmia BC, Lal PBB, Jain AK, Jain AK (2009). Irrigation and Water Power Engineering. Laxmi Publications, Ltd., India.
Sharma A, Nallasivam K (2023). Static analysis of a concrete gravity dam using the finite element technique. Asian Journal of Civil Engineering, 24(8), 2939-2957.
STAAD Pro (2007). Technical reference manual. Research Engineers, a Bentley Solutions Center. www.bentley.com/staad.
Tidke AR, Adhikary S (2022). Vibration characteristics of gravity dams for varying reservoir and tailwater heights, and interaction effects. In Symposium in Earthquake Engineering, Singapore: Springer Nature Singapore, 171-180.
Wang C, Zhang H, Zhang Y, Guo L, Wang Y, Thira Htun TT (2021). Influences on the seismic response of a gravity dam with different foundation and reservoir modeling assumptions. Water, 13(21), 3072.
Žvanut P (2022). 3D finite element analysis of a concrete dam behavior under changing hydrostatic load: A case study. Materials, 15(3), 921.
