DYNAMIC RESPONSE OF CONCRETE GRAVITY DAM ON RANDOM SOIL
Journal: International Journal of Civil Engineering and Technology (IJCIET) (Vol.6, No. 11)Publication Date: 2015-11-25
Authors : Atheer Zaki Mohsin; Hassan Ali Omran; Abdul - Hassan K. Al - Shukur;
Page : 21-31
Keywords : Concrete gravity dam; Dam-reservoir-foundation interaction; dynamic response; hydrodynamic pressure; Random soil;
Abstract
This research reports the dynamic response of a concrete gravity dam under seismic excitation including dam?reservoir?foundation interaction. A peek ground accelerations PGAS of 0.6ghas been applied on a numerical model of the gravity dam that is built by finite element method using ANSYS. In this model, the dam is considered as a rigid body, the reservoir as compressible in viscid fluid, and the foundation as a random soil. A parametric study is achieved through change of relative density (Dr) of ground soil, namely, Dr= 60% and 80%. Modal and transient analyses have been considered to achieve the results. The results are analyzed and compared with experimental ones. It is shown a significant variation in the estimated seismic response when the interaction is included in analyses.
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