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Seismic performance evaluation of dam-reservoir-foundation systems to near-fault ground motions

Author

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  • Gaohui Wang
  • Sherong Zhang
  • Chao Wang
  • Mao Yu

Abstract

Ground motion records obtained in recent major strong earthquakes have provided evidence that ground motions recorded near the near-fault regions differ in many cases from those observed further away from the seismic source. As the forward directivity and fling effect characteristics of the near-fault ground motions, they have the potential to cause more considerable damage to structures during an earthquake. Therefore, understanding the influence of near-fault ground motions on the performance of structures is critical to mitigate damage and perform effective response. This paper presents results of a study aimed at evaluating the effects of near-fault and far-fault ground motions on seismic performance of concrete gravity dams including dam-reservoir-foundation interaction. Koyna gravity dam is selected as a numerical application. Four different near-fault ground motion records with an apparent velocity pulse are used in the analyses. The earthquake ground motions recorded at the same site from other events that the epicenter far away from the site are employed as the far-fault ground motions. The seismic performance evaluation method based on the demand-capacity ratio, the cumulative overstress duration and the spatial extent of overstressed regions is presented. The concrete damaged plasticity model including the strain hardening or softening behavior is employed in nonlinear analyses. Nonlinear seismic damage analyses of the selected concrete dam subjected to both near-fault and far-fault ground motions are performed. The results obtained from the analyses show the effects of near-fault ground motions on seismic performance of concrete gravity dams and demonstrate the importance of considering the near-fault ground excitations. Copyright Springer Science+Business Media Dordrecht 2014

Suggested Citation

  • 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.
    • Handle: RePEc:spr:nathaz:v:72:y:2014:i:2:p:651-674
    DOI: 10.1007/s11069-013-1028-9
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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. 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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    Cited by:

    1. Fjóla Sigtryggsdóttir & Jónas Snæbjörnsson & Lars Grande & Ragnar Sigbjörnsson, 2015. "Methodology for geohazard assessment for hydropower projects," 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. 79(2), pages 1299-1331, November.
    2. 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.

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