This paper includes the investigation of soil–structure interaction (SSI) effect on seismic response 20 and 30-story reinforced concrete moment resisting frames (MRFs) rested a piled raft foundation using direct approach. After that, study is conducted to show impact cellular instead designed solid dynamic building. A introduced select best gap size for raft. The soil model assumed as single la...

the pile-raft foundation is a combination of a raft foundation with piles. pile-raft foundation has been widely designed, assuming all structure loads to be transferred to piles without considering contribution of the load taken by contact surface between raft and soil. methods of analysis currently used in practice are based upon relatively conservative assumptions of soil behavior or on the l...