In-situ Experiment on Dynamic Soil-Structure Interaction

Abstract

The traditional methods utilized in today's seismic design of structures involve structure's foundation as a fixed base by assuming soil does not deforms. Earthquake input motion is also considered as a horizontal movement that is not being affected by the structure. On the other hand, the seismic analysis of dynamic soil-structure interaction which considers superstructure, foundation and surrounding soil of building, aims to evaluate structural response based on the interaction of these three components. In this study, presence of building, which is effecting on wave propagation, is experimentally investigated including soil-structure interaction. Acceleration record from the foundation of a two-story reinforced concrete, that is forced to vibrate by artificial dynamic load, is compared with the free ground surface vibration record around the building to indicate the effect of soil-structure kinematic interaction on foundation vibration. With this specific field study, differences in acceleration, displacements time histories and Fourier spectrums are comparatively presented using recorded vibrations from selected locations of interest