seismic evaluation of special steel moment frames subjected to near-field earthquakes with forward directivity by considering soil-structure interaction effects

Assuming that the bottom soil of the foundation is rigid and exibility e ect is ignored, the seismic response of a structure is in uenced by its dynamic properties and soil exibility does not a ect the mentioned response. hence, considering the analytical results only based on the xed base buildings can result in an unsafe structure design. therefore, near- eld earthquakes produce many seismic needs to force the structure to dissipate this input energy with relatively large displacements. accordingly, the primary objective of the present paper is to determine the seismic response of the 3-, 5-, and 8-story steel buildings with the special moment frame system, considering the soil-structure interaction and panel zone modeling. to this end, selected records of the near- and far- eld earthquakes were used to facilitate the nonlinear time history analysis of the structures, whose responses to earthquakes were compared in both of the mentioned states. the results showed that the average drift of all three structures under the e ect of near- eld earthquakes was two times larger than the drift of the structures under the e ect of the far- eld earthquakes.