In soil-structure interaction, modeling the soil and structure set is one of the most important issues in geotechnical and structural field. In this regard, application of soil mechanic software such as PLAXIS is of particular importance. In this paper the performance of PLAXIS in soil-structure interaction is addressed. Frist, beam analysis results with different support condition were investigated by PLAXIS and compared with classic structural analysis methods’ results. Then two building frames, a simple one story frame and a 17-floor, 5 spans frame were modeled and analyzed by PLAXIS and ETABS. Results of PLAXIS had good agreement with the results from classic equations of structural analysis and ETABS software, suggesting the reliability of PLAXIS in soil-structure interaction analysis.

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