Davood Salehi - Head of Earthlill Dam Design Group, Mahab Ghodss Consulting Engineers, Tehran, IRAN

The Dariyan dam with 180m height is one of the highest rockiill dams in IRAN. The dam is located in high seismic zone. The ratio of crest length to the dam height is a little over 2. So, three dimensional effects of the valley on the dynamic response of the dam are not negligible. To study the dynamic response of the dam in three-dimensional conditions, linear and nonlinear dynamic analyses were performed by means of FLAC3D software. These analyses have been demonstrated that the maximum crest acceleration in three-dimensional analysis is much higher than 2D analysis and also permanent displacements of the dam body in 3D analysis are increased

Rockiill dam, Dynamic analysis, Three-dimensional analysis, Nonlinear analysis