Abstract: The time domain parameter identification method of the foundation-structure interaction system is presented.On the basis of building the computation mode and the motion equation of the foundation-structure interaction system,the system parameter identification method was established by using the extended Kalman filter (EKF) technique and taking the unknown parameters in the system as the augment state variables. And the time parameter identification process of the foundation-structure interaction system was implemented by using the data of the layer foundation-storehouse interaction system model test on the large vibration platform.The computation result shows that the established parameter identification method can induce good parameter estimation.

Key words: foundation-structure, interaction system, time domain parameter identification