Lead rubber bearing using magnetorheological damper and toggle brace

摘要

The present invention relates to a seismic isolation device in which a magnetorheological damper and a toggle dam are combined. The seismic isolation device includes an upper plate and a lower plate, a pad disposed between the upper plate and the lower plate, A lead-free bearing support for supporting the impact and load of the bearing; A pair of toggle legs connected at one end to the lead-free base and at the other end to each other at the joints; And a magnetorheological damper provided between the joint and the upper edge of the upper plate for attenuating vibration through linear motion and filled with a magnetorheological fluid whose viscosity is changed by an electric current supplied from the outside, do. According to the present embodiment, in addition to the dissipation action according to the angle change of the toggle curve at the time of the lateral displacement of the structure, the viscosity of the magnetorheological fluid is changed by controlling the amount of power supplied to the magnetorheological damper, So that the linear motion (piston motion) of the magnetorheological damper can be varied to optimize the supporting force for supporting the structure, so that sufficient energy dissipating capability can be exhibited within the damage range of the structure.