American Society of Civil Engineers

Earthquake Stresses in Arch Dams. I: Theory and Antiplane Excitation

by Slobodan B. Kojic´, (Engr., Energoproject Co., 11070 Belgrade, Yugoslavia) and Mihailo D. Trifunac, (Prof., Civ. Engrg. Dept., Univ. of Southern California, Los Angeles, CA 90089-2531)

Journal of Engineering Mechanics, Vol. 117, No. 3, March 1991, pp. 532-552, (doi:

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Document type: Journal Paper
Abstract: A procedure is presented for analysis of earthquake response of concrete arch dams to nonuniform motion of the canyon walls. A dam is modeled by the finite-element method. The nonuniform, free-field motion of canyon walls is obtained by solving the two-dimensional wave equation. The transient, upstream-downstream (antiplane) motions of the canyon walls induced by plane SH-waves are illustrated. The response of an idealized arch dam is investigated neglecting the dam-canyon interaction, and the effects caused by the wave propagation across the canyon. The dam response to the nonuniform canyon accelerations decreases by about 25–30% with respect to the case of excitation by the uniform canyon motion.

ASCE Subject Headings:
Arch dams
Finite element method
Seismic effects
Wave propagation