BASE ISOLATION STRUCTURE FRAMING AND CONSTRUCTION METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a base isolation structure framing and construction method therefor capable of reducing a seismic force acting to a building having a large aspect ratio while preventing the overturning of the building creating a floating phenomenon due to rocking vibration during an earthquake. SOLUTION: A building having a large aspect ratio and the basement floors and a slab supporting it is cut separately with each other so as to allow floating, and a displacement in a horizontal direction of the building is restricted but the displacement in the vertical direction is permitted between the underground exterior walls of the building and earth-retaining walls made at the ground or existing underground exterior walls, and an energy absorbing apparatus capable of generating damping force during the displacement is installed.