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Strain-based seismic failure evaluation of coupled dam-reservoir-foundation system

  • Hariri-Ardebili, M.A. (Department of Civil Environmental and Architectural Engineering, University of Colorado at Boulder) ;
  • Mirzabozorg, H. (Department of Civil Engineering, K. N. Toosi University of Technology) ;
  • Ghasemi, A. (Department of Civil Engineering, K. N. Toosi University of Technology)
  • 투고 : 2013.01.27
  • 심사 : 2013.03.10
  • 발행 : 2013.03.25

초록

Generally, mass concrete structural behavior is governed by the strain components. However, relevant guidelines in dam engineering evaluate the structural behavior of concrete dams using stress-based criteria. In the present study, strain-based criteria are proposed for the first time in a professional manner and their applicability in seismic failure evaluation of an arch dam are investigated. Numerical model of the dam is provided using NSAD-DRI finite element code and the foundation is modeled to be massed using infinite elements at its far-end boundaries. The coupled dam-reservoir-foundation system is solved in Lagrangian-Eulerian domain using Newmark-${\beta}$ time integration method. Seismic performance of the dam is investigated using parameters such as the demand-capacity ratio, the cumulative inelastic duration and the extension of the overstressed/overstrained areas. Real crack profile of the dam based on the damage mechanics approach is compared with those obtained from stress-based and strain-based approaches. It is found that using stress-based criteria leads to conservative results for arch action while seismic safety evaluation using the proposed strain-based criteria leads to conservative cantilever action.

키워드

참고문헌

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피인용 문헌

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  3. Quantification of seismic potential failure modes in concrete dams vol.45, pp.6, 2016, https://doi.org/10.1002/eqe.2697
  4. Quantitative failure metric for gravity dams vol.44, pp.3, 2015, https://doi.org/10.1002/eqe.2481
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  6. Free vibration analysis of gravity dam-reservoir system utilizing 21 node-33 Gauss point triangular elements vol.5, pp.1, 2016, https://doi.org/10.12989/csm.2016.5.1.059