Patent ID: 6672573
Filing Date: 2004-01-06
Classification: E04H

Abstract:
An apparatus for placement within the gravity frame of a structure which amplifies inter story structural displacements to increase passive energy dissipation, comprising:(a) a reaction frame rigidly coupled to a base level; (b) means for amplifying mechanical displacement coupled between said reaction frame and said gravity frame, said means for amplifying mechanical displacement having a mechanical output; and (c) a damping device coupled to the mechanical output of said means for amplifying displacement; (d) said means for amplifying mechanical displacement comprising (i) a generally concentric rotating gearset having a first gear connected to a larger second gear; (ii) said first gear being coupled to a first linear coupling member subject to the relative linear displacement of the gravity frame in relation to the reaction frame; (iii) said second gear coupled to a second linear coupling member which is attached to said damper device.