EARTHQUAKE RESISTANT BUILDING STRUCTURE ENCIRCLED BY SEISMICALLY ISOLATED STRUCTURE

摘要

PROBLEM TO BE SOLVED: To cut costs of an earthquake resistant building structure by constructing a seismically isolated structure which externally supports the building structure, encircles an upper portion, side surface portions, and a lower portion of the structure while maintaining a slight interval with respect to the structure, and is isolated from the ground. ;SOLUTION: A seismically isolated structure 2 is constructed while maintaining a slight interval from a building structure 1, and rolling supporters 3 are secured to bottom surfaces of column bases of a foundation of side surfaces of the seismically isolated structure 2, which bottom surfaces are to make contact with the ground. Each supporter 3 is equipped with a viscous damper having a plurality of downward ball casters. Part of horizontal beams of the seismically isolated structure 2 is penetrated through foundation beams of the building structure 1, and steel plates are fixed to the front ends of the respective horizontal beams, to thereby form stoppers 5. Further, shock absorbers 6 formed of rubber, silicon gel, or the like are secured to some of portions of intervals between the seismically isolated structure 2 and the stoppers 5 or the building structure 1, at which portions the seismically isolated structure 2 can make contact with the stoppers 5 or the building structure 1. Further, a damper 9 is attached to the seismically isolated structure 2 at a portion corresponding to a large interval between the structure 2 and the building structure 1. Thus, vibration proof of the building structure 1 can be enhanced, and construction costs of the same can be reduced.;COPYRIGHT: (C)2000,JPO