VIBRATION-PROOF STRUCTURE OF STRUCTURE

PROBLEM TO BE SOLVED: To provide a vibration-proof structure of a structure in which shakes in two horizontal directions caused by an earthquake are attenuated.SOLUTION: The vibration-proof structure comprises an attenuation concatenation mechanism 4 including: an elasto-plastic deformation member 5 which is elastically deformed and plastically deformed when a load exceeding an elasticity range acts; and a mounting pedestal 7 including a concatenation member 6 which is mounted to be rotatable at least in a horizontal direction with respect to one end and another end of the elasto-plastic deformation member 5, and fixed to a support steel-frame post 2 and overhang members 3, 3'. When at least one of a load from an X-axis direction and a load from a Y-axis direction on a horizontal plane caused by shakes of a structure 1 acts on the elasto-plastic deformation member while exceeding an elasticity range, the elasto-plastic deformation member 5 is plastically deformed and absorbs energy, thereby attenuating the shakes.