In the present paper the seismic stability of gravity and arch dams is evaluated under earthquake ground motion considering the foundation nonlinearities. For this purpose, the finite element models of the 103 m Koyna gravity dam and the 203 m Dez arch dam are prepared. A fixed smeared crack model with the Willam-Warnke failure criterion is used for modeling the concrete cracking. Also the elasto-plastic model with the Drucker-Prager yield criterion is used for foundation cracking. Viscous boundary models are used for the far-end areas of the foundation medium to absorb the outgoing waves. It was found that considering the nonlinear foundation model increases the cracked areas on the dam body, especially in the vicinity of the foundation, and reduces the total stability of the coupled system.
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Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 2, p. 14, March-April, 2014.
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Hariri-Ardebili, M.A. Impact of Foundation Nonlinearity on the Crack Propagation of High Concrete Dams. Soil Mech Found Eng 51, 72–82 (2014). https://doi.org/10.1007/s11204-014-9257-9
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DOI: https://doi.org/10.1007/s11204-014-9257-9