Studying Dam-Foundation Interaction in Masjed Soleiman Rock-Earth Fill Dam Using Recorded Earthquake Signals

Studying the seismic behavior of earth dams is one of the most important problems in the geotechnical science. Using weak recorded responses on dam body is the most appropriate method in studying seismic behavior of dams. Available accelerograms on Masjed Soleiman dam body is a powerful tool to reach to this aim. Using recorded accelerograms in the gallery station as the input motion and also using different masses for foundation, 2D numerical analysis are performed and the dam-foundation interaction problem is studied. Recorded and calculated responses of dam body are compared with each other based on different approaches. It should be mentioned that the used earthquake records in this research are weak and linear behavior for dam body is assumed. The obtained results show that time-frequency distribution (TFD) is an appropriate method to process the recorded and calculated signals and also using below 50 per cent (20-30 per cent) for the mass of foundation is can lead to the nearest results to recorded responses.