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Numerical investigation on seismic behaviour of aged concrete gravity dams to near source and far source ground motions

Author

Listed:
  • Soumya Gorai

    (Indian Institute of Technology Kharagpur)

  • Damodar Maity

    (Indian Institute of Technology Kharagpur)

Abstract

This study presents a numerical investigation on the seismic behaviour of aged concrete gravity dams under near source and far source ground motions. Two-dimensional formulation of a concrete gravity dam is carried out implementing the finite element technique, considering full reservoir and rigid base condition. Degradation of concrete properties due to hydro-chemo-mechanical effects and the influence of sediment layers are taken into account to calculate the response of the dam-reservoir coupled system at different ages. Two near source and far source ground motions from real earthquake events are selected for time-history analysis. Seismic performance evaluation is also carried out to assess the probable damage level of the dam. The outcomes of this study show the variation of seismic response of the dam over the ages and the necessity of considering the aging effect, e.g. degradation of concrete and influence of sediment layers, in the inspection of seismic safety issues of concrete gravity dam. This study also reveals the critical effect of near source ground motions on concrete gravity dams at later ages.

Suggested Citation

  • Soumya Gorai & Damodar Maity, 2021. "Numerical investigation on seismic behaviour of aged concrete gravity dams to near source and far source ground motions," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 105(1), pages 943-966, January.
    • Handle: RePEc:spr:nathaz:v:105:y:2021:i:1:d:10.1007_s11069-020-04344-7
    DOI: 10.1007/s11069-020-04344-7
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    References listed on IDEAS

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    1. Alemdar Bayraktar & Temel Türker & Mehmet Akköse & Şevket Ateş, 2010. "The effect of reservoir length on seismic performance of gravity dams to near- and far-fault ground motions," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 52(2), pages 257-275, February.
    2. Fujian Yang & Guoxin Wang & Yang Ding, 2019. "Damage demands evaluation of reinforced concrete frame structure subjected to near-fault seismic sequences," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 97(2), pages 841-860, June.
    3. Gaohui Wang & Sherong Zhang & Chao Wang & Mao Yu, 2014. "Seismic performance evaluation of dam-reservoir-foundation systems to near-fault ground motions," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 72(2), pages 651-674, June.
    4. A. Joshi & Pushpa Kumari & Sandeep Singh & M. Sharma, 2012. "Near-field and far-field simulation of accelerograms of Sikkim earthquake of September 18, 2011 using modified semi-empirical approach," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 64(2), pages 1029-1054, November.
    5. Süleyman Adanur & Ahmet Altunişik & Alemdar Bayraktar & Mehmet Akköse, 2012. "Comparison of near-fault and far-fault ground motion effects on geometrically nonlinear earthquake behavior of suspension bridges," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 64(1), pages 593-614, October.
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