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Coupled Systems Mechanics Volume 2, Number 1, March 2013 , pages 85-110 DOI: https://doi.org/10.12989/csm.2013.2.1.085 |
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Strain-based seismic failure evaluation of coupled dam-reservoir-foundation system |
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M.A. Hariri-Ardebili, H. Mirzabozorg and A. Ghasemi
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| Abstract | ||
| 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-B 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. | ||
| Key Words | ||
| dam-foundation interaction; massed foundation; strain-based criteria; damage mechanics; infinite elements | ||
| Address | ||
| M.A. Hariri-Ardebili : Department of Civil Environmental and Architectural Engineering, University of Colorado at Boulder, P.O. Box 80309-0428, Boulder, CO, USA H. Mirzabozorg and A. Ghasemi: 2Department of Civil Engineering, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran, Iran | ||
