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Concrete Gravity Dams and Traveling Wave Effect along Reservoir Bottom

Authors: H. Mirzabozorg, M. Varmazyari

Abstract:

In the present article, effect of non-uniform excitation of reservoir bottom on nonlinear response of concrete gravity dams is considered. Anisotropic damage mechanics approach is used to model nonlinear behavior of mass concrete in 2D space. The tallest monolith of Pine Flat dam is selected as a case study. The horizontal and vertical components of 1967 Koyna earthquake is used to excite the system. It is found that crest response and stresses within the dam body decrease significantly when the reservoir is excited nonuniformly. In addition, the crack profiles within the dam body and in vicinity of the neck decreases.

Keywords: Concrete gravity dam, dam-reservoir-foundation interaction, traveling wave, damage mechanics.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1057329

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References:


[1] H. Mirzabozorg, M. Ghaemian, A. Noorzad, and M. Abbasi Zoghi, "Dam-reservoir-foundation interaction effects on nonlinear seismic behavior of concrete gravity dams using damage mechanics approach," International Journal of Earthquake Engineering and Engineering Seismology (EEE), vol. 3, pp. 52-60, 2007.
[2] H. Mirzabozorg, A. R. Khaloo, M. Ghaemian, and B. Jalalzadeh, "Nonuniform cracking in damage mechanics approach for seismic analysis of concrete dams in 3d space," International Journal of Earthquake Engineering and Engineering Seismology (EEE), vol. 2, pp. 48-57, 2007.
[3] Y. Calayir and M. Karaton, "Seismic fracture analysis of concrete gravity dams including dam-reservoir interaction," Computers & Structures, vol. 83, pp. 1595-1606, 2005.
[4] A. Bayraktar, A. A. Dumanoglu, "The effect of the asynchronous ground motion on hydrodynamic pressures," Computers & Structures, vol. 68, no. 1, pp. 271-282, 1998.
[5] A, Ghobarah and M. Ghemian, "Traveling wave effect on hydrodynamic forces on dams," Journal of the European Earthquake Engineering, vol. X111, no. 3, pp. 22-34, 1999.
[6] S. W. Alves, "Nonlinear analysis of Pacoima dam with spatially nonuniform ground motion," Ph.D. Thesis, California Institute of Technology Pasadena, California, 2004.
[7] S. W. Alves, J.F. Hall, "Generation of spatially non-uniform ground motion for nonlinear analysis of a concrete arch dam," Earthquake Engineering & Structural Dynamics, vol. 35, no. 11, pp. 1339-1357, 2006.
[8] H. Mirzabozorg, M. Ghaemian, and R. Kianoush, "Damage mechanics approach in seismic analysis of concrete gravity dams including damreservoir interaction," International Journal of Earthquake Engineering and Engineering Seismology (EEE), vol. 3, pp. 17-24, 2004.
[9] S. Sharan, "Time-domain analysis of infinite fluid vibration," International Journal of Numerical Methods in Engineering, vol. 24, pp. 945-958, 1987.
[10] M. Ghaemian and A. Ghobarah, "Staggered solution schemes for damreservoir interaction," Journal of fluids and structures, vol. 12, pp. 933- 948, 1998.