Abstract
In the design of the building which accommodate various functions, it is difficult to harmonize structural characteristics required for each functions. This difficulty also exists in ordinary base isolated buildings. In this paper, an example of the building is introduced where different types of structures are connected by mid-story isolation to solve this problem. By introducing this mid-story isolation system, seismic energy can be concentrated at the mid-story isolation and consequently high seismic capacity of the total building is secured.
