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The effect of reservoir length on seismic performance of gravity dams to near- and far-fault ground motions

Author

Listed:
  • Alemdar Bayraktar
  • Temel Türker
  • Mehmet Akköse
  • Şevket Ateş

Abstract

In this article, the effect of reservoir length on seismic performance of gravity dams to near- and far-fault ground motions is investigated. For this purpose, four finite element models of dam–reservoir–foundation interaction system are prepared by using the Lagrangian approach. In these models, the reservoir length varies from H to 4H (H: the height of dam). The Folsom gravity dam is selected as a numerical application. Two different ground motion records of 1989 Loma Prieta earthquake are used in the analyses. One of ground motions is recorded in near fault; the other is recorded in far fault. Also, the two records have the same peak ground acceleration. The study mainly consists of three parts to assess the effects of reservoir length on the seismic performance of the concrete gravity dam. In the first part, the linear time-history analyses of the four finite element models prepared for the Folsom gravity dam are performed. In the second part, the seismic performance of the dam is evaluated according to demand–capacity ratio and cumulative inelastic duration. Finally, the nonlinear time-history analyses of the finite element models of the dam are carried out by using Drucker–Prager yield criteria for dam concrete. It is seen from the analyses results that the seismic behavior of the concrete gravity dams is considerably affected from the length of the reservoir. The reservoir length of 3H is adequate for concrete gravity dams. The selection of ground motion is on of the important parts of seismic evaluation of gravity dams. Also, the frequency characteristics of the ground motion having the same peak ground acceleration affect the seismic performance of the dam. The near-fault ground motions are generally creates more stress on the dam body than far-fault ground motions. The used performance approach provides a systematic methodology for assessment of the seismic performance and necessity of nonlinear analyses for dam systems. Copyright Springer Science+Business Media B.V. 2010

Suggested Citation

  • 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.
  • Handle: RePEc:spr:nathaz:v:52:y:2010:i:2:p:257-275
    DOI: 10.1007/s11069-009-9368-1
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    Citations

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    Cited by:

    1. Prithwish Saha & Kalyan Kumar Mandal, 2021. "A study of earthquake-induced vibration on laminated composite plates using finite element method," 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. 106(3), pages 2251-2277, April.
    2. José Antunes do Carmo & Rita Carvalho, 2011. "Large dam-reservoir systems: guidelines and tools to estimate loads resulting from natural hazards," 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. 59(1), pages 75-106, October.
    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. 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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