Document Type : Structural Earthquake Engineering
In this paper the dynamic soil-structure interaction effects on the seismic response of building structures with surface and embedded mat foundations have been studied using shake table tests on scaled models. Results obtained from test and analysis are compared with buildings code requirements. For this purpose, four structural models with 5, 10, 15 and 20 floors as common representative buildings in an urban area are designed and constructed for dynamic tests. Both soft and relatively soft soil media are considered in this study. Different parameters have been studied in this research which includes: building aspect ratio, shear wave velocity, frequency content, damping and acceleration of structural models. Also, the results of finite element analysis of soil-structure system compared with shake table results. The effects of soil-structure interaction is demonstrated as increasing the period of vibrations and damping ratio with a dominant rocking mode in higher buildings. However, these effects is reducing by increasing the embedment effects of foundation. Morever, the results of this research is important for developing of Soil-Structure-Interaction in national codes.