Civil Engineering Association

ANALYSIS ON SEISMIC PERFORMANCE OF ENERGY DISSIPATION SUBSIDIARY PIERS CONSIDERING FOUNDATION EFFECTS

This paper attempts to study the effects of dynamic pile-soil-structure interaction (PSSI) on the seismic performance of an energy dissipation subsidiary pier with pile foundation in a deep soil stratum overlying rigid bed rock. Pushover analysis and a series of a nonlinear and inelastic time history analysis on seismic behavior of the pier subjected to various earthquake events were carried out using three models of the structure. In the seismic analysis of pile-soil-pier system, the soil equivalent linear properties of soil were adopted and the seismic input was applied at bed rock, which is an equivalent force. In order to obtain the equivalent linear properties of soil and the bedrock motion, the seismic response analysis for free-field was performed. The results of the comparative analysis reveal that PSSI has slight effect on the seismic capacity of the pier, but significant impact on the seismic responses of the pier, especially under strong earthquake.