STOCHASTIC DYNAMIC RESPONSE OF AN EMBANKMENT DAM TO NON-UNIFORM GROUND MOTIONS

M. Davoodi¹, K. Darbandi², M.A. Sadroaldini³,

¹Assistant Professor, International Institute of Earthquake Engineering and Seismology, (IIEES), Tehran, Iran

²M.S Student, Civil Department of Arak Azad University, kambiz_darbandy@yahoo.com

³PhD Student, Civil Department of Science and Research Azad University, Tehran

ABSTRACT

The effect of the spatial variation of earthquake ground motion (SVEGM) on the dynamic response of multiple-support structures can be important. The objective of this paper is to investigate the seismic response of embankment dams subjected to multiple-support excitation. To this end, the response of Marun embankment dam to uniform and non-uniform excitations were analyzed using a random vibration approach. The spatially varying ground motion is modelled considering both incoherence and wave passage effects. It was observed that the stress components calculated from the varying earthquake ground motions are larger than those at the uniform ground motion.

Keywords: SVEGM, Embankment dam, stochastic dynamic response.