A simplified model of shaking table test on soil-structure interaction

This paper proposes a simplified method conducting earthquake simulation test on shaking table for high-rise tower structure with consideration of soil-structure interaction to overcome the limitation of the load-bearing capacity,the size of the shaking table and the difficulty in simulating both of the soil foundation and its' boundary condition in experimental practice.An off-shore high-rise tower structure was taken as the example for developing the proposed simplified method.A 3-D finite element analysis model(Model A) considering the soil-structure interaction and a simplified model(Model B) were built.Both models are equipped with the same upper structure.According to results of numerical modal analyses,response spectrum analyses,and time-history analyses,the form of foundation structure was adjuset repeatedly so that the seismic responses of superstructure of both Model A and Model B are same.Model B is precisely the simplified model considering soil-structure interaction which could be used for shaking table test.