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Seismic performance evaluation of a jointed arch dam

Alembagheri, M ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1080/15732479.2015.1009124
  3. Publisher: Taylor and Francis Ltd , 2016
  4. Abstract:
  5. Seismic performance and safety of a jointed arch dam, as an arch-shaped mass concrete structure, are investigated through the nonlinear incremental dynamic analysis. In this way, 12 proper ground motions are selected, each of them is scaled to 12 successively increasing intensity levels and applied to the dam. Three and seven contraction joints are inserted within the dam body, and stage construction is taken into account. Several main assumptions including dam–reservoir–foundation dynamic interaction, absorbing boundary conditions at the far-ends of the reservoir and foundation, and material and joint nonlinearities are considered. The failure modes of the dam are determined according to the distribution of damaged zones through the dam body. The results of the static analysis under dam self-weight and hydrostatic load show that the inclusion of the contraction joints and the stage construction do not considerably alter the tensile principal stresses; however, they increase the compressive stresses. In seismic analysis, increasing the number of the contraction joints generally reduces the joints opening and sliding displacements. The contraction joints can significantly decrease the damage imposed to the dam body. Finally, it is concluded that inserting the contraction joints can increase the seismic safety of the arch dam
  6. Keywords:
  7. Safety ; Accident prevention ; Arch dams ; Arches ; Dams ; Dynamic analysis ; Failure modes ; Seismic design ; Seismic waves ; Seismology ; Absorbing boundary condition ; Contraction joints ; Damage ; Foundation dynamics ; Incremental dynamic analysis ; Seismic Performance ; Seismic performance evaluation ; Sliding displacements ; Reservoirs (water)
  8. Source: Structure and Infrastructure Engineering ; Volume 12, Issue 2 , 2016 , Pages 256-274 ; 15732479 (ISSN)
  9. URL: http://www.tandfonline.com/doi/full/10.1080/15732479.2015.1009124