EFFECTS OF SOIL-STRUCTURE INTERACTION ON THE RESPONSES OF STRUCTURE TO WIND-INDUCED VIBRATION
土-结构相互作用对结构风振响应的影响

Through the response evaluation of frame structures to wind-induced vibration,the effects of soil-structure interaction (SSI) on the responses of the structures are illustrated. Evaluation results show that in the response analysis of structure to wind-induced vibration,the effects of SSI on the wind responses are not always conservative. SSI can obviously reduce the first resonant frequency of the structure system. When the damping in soil is small,the elastic relative displacements of structures with SSI may be greater than that of structures without SSI. This phenomenon is more significant if the relative stiffness of the superstructure and its surrounding ground is smaller. Moreover,the total displacements of the structure with SSI are always much greater than that of the structures without SSI,which can make people produce strong uncomfortable perception. Therefore,in the response analysis of structure to wind-induced vibration,the effect of soil-structure interaction should be considered.