Investigating the Effect of Soil Structural Interaction on Concrete Structural System

Soil-structure interaction is one of the important and influential factors on the seismic behavior of structures, especially reinforced concrete structures. In this study, the effect of soil-structure interaction on a 9-story reinforced concrete structure with a flexural frame system designed based on low-risk seismic requirements and for nonlinear analysis with OpenSees finite element software in two different modes with rigid base without considering the interaction And with a flexible base, the effect of soil-structure interaction has been modeled and evaluated. The results show that due to the interaction, the base shear, the shear within the floors and the amount of relative displacement are reduced, while the actual periodicity of the building and the absolute displacement of the floors is increased.