Analysis of steel frames with soil structure interaction under seismic loads

In this research work, response spectrum and linear/nonlinear time history analysis of 2D multi-story steel frames on gravel soil with and with-out soil structure interactions have been done. Frames have different height start from 3 stories and up to 20 stories. A sub-structure method is used to model soil and shallow (footing) foundation system by linear springs and dashpots. Three earthquake records are selected, Kocaeli, Erzincan and Düzce earthquake accelerograms records are selected and scaled to specific response spectrum with PGA 0.35 and soil type B according to Eurocode 8 is considered. Fundamental period and base shears have been investigated with and without soil-structure interactions; the results have been presented and compared