VIBRATION ISOLATION CONSTRUCTION METHOD FOR EXISTING BUILDING AND VIBRATION ISOLATED BUILDING

PROBLEM TO BE SOLVED: To provide a vibration isolation construction method for an existing building by which a vibration isolation device is installed on a middle story of an existing building without disturbing usual business in the building, and vibration isolation of the building is attained by a simple work and in a short period. SOLUTION: New columns 11 are disposed on the outside of existing outer peripheral columns 2, respectively, in an integrating manner. The vibration isolation devices 15 are interposed at predetermined positions of the new columns 11, respectively. At least one or more new beams 12 are disposed along a roof floor face of the existing building 1, and both ends of the new beams 12 are joined to any of the new columns 11, by which an external frame 10 comprising the new columns and the new beams may be structured on the outer peripheral part of the existing building. After that, supporting members 18 are embedded in existing internal columns 3, respectively, to extend from the positions near the parts where the existing internal columns 3 are planned to be cut to the new beams 12. The existing internal columns 3 and the existing outer peripheral columns 2 are cut in a state that the load applied to the existing internal columns is supported by the new beams 12 in a hanging manner through the supporting members 18. COPYRIGHT: (C)2005,JPO&NCIPI