Open AccessSpatial variation input effects on seismic response of arch dams
Author(s) -
Morteza Sohrabi-Gilani,
Mohsen Ghaemian
Publication year - 2012
Publication title -
scientia iranica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.299
H-Index - 51
eISSN - 2345-3605
pISSN - 1026-3098
DOI - 10.1016/j.scient.2012.06.006
Subject(s) - arch dam , displacement (psychology) , foundation (evidence) , acceleration , arch , geology , spectral acceleration , finite element method , ground motion , structural engineering , response spectrum , peak ground acceleration , geotechnical engineering , spatial variability , seismology , engineering , physics , geography , mathematics , psychology , archaeology , classical mechanics , psychotherapist , statistics
In the present paper, the seismic response of an arch dam subjected to spatial variation of ground motions along the interface with its foundations is investigated. Recorded ground accelerations at the dam foundation interface of an arch dam were used for the purpose of this investigation. Topographic amplification between various points of the interface was studied by obtaining ratios of the response spectral displacement and spectral pseudo acceleration. Time shift and amplification between stations show the nonuniform nature of ground motions for large structures like dams. Recorded ground accelerations were interpolated for different nodes of the finite element model. The seismic responses of the Karun III dam subjected to multiple support excitations are determined. The results show that nonuniform ground acceleration can have extensive effects on dam behavior and can increase the responses. Pseudo static displacement is the dominant part of total displacement for points near the dam foundation interface; however, dynamic displacement is more significant for the middle part of the dam