ABSTRACT
The base-isolated structure is an effective seismic isolation method for buildings, which can effectively reduce the seismic response of the upper structure. However, only specific calculations are made in the current relevant codes for frequent and fortification earthquakes, and their seismic performance under high-intensity earthquakes is of concern. This paper studies a six-story frame structure with a lead-core rubber isolation support base. Its incremental dynamic analysis (IDA) is carried out to investigate the seismic safety of the structure under different earthquake intensities. The results show that the structure meets the design concept of “no damage in small earthquakes, is repairable in medium earthquakes and no collapse in large earthquakes” and has a high probability of being in a repairable state under rare earthquakes, presenting relatively good seismic performance.
