Study on Identification of SSI Damping System Based on Large-Scale Shaking Table Test

Damping system represents the energy dissipation characteristics of the overall structural system. The correct identification of damping system is not only the premise of selecting dynamical analysis method, but also the foundation of obtaining accurate results in seismic analysis. Traditionally, the identification of damping system under dynamic action is based on material properties. However, this method is lack of theoretical and experimental research. Based on fundamental identification method, the paper presents the study on the consistency of dynamic characteristics between different parts by shaking table test. The changing law of SSI damping system in different dynamic processes is investigated. The experimental results indicate that SSI system manifest obviously classical energy dissipation characteristics under certain conditions and can be considered as an approximate classical damping system.