The invention discloses a composite
energy consumption system with displacement secondary amplification and triggering self-resetting functions, and belongs to the technical field of
energy consumption and vibration reduction of building structures. The composite
energy consumption system with the displacement secondary amplification and triggering self-resetting functions is mainly composed of a displacement secondary amplification mechanism and a triggering self-resetting
damper. According to the composite energy consumption
system with the displacement secondary amplification and triggering self-resetting functions, on the premise that the occupied space is small, structural interlayer displacement can be amplified and loaded to the two ends of the
damper by means of the characteristics of a displacement amplifying device, so that the triggering self-resetting
damper is fully deformed and consumes energy; the self-resetting function of the damper is not triggered during small earthquakes,
earthquake energy is consumed through in-plane plastic deformation of a hollowed-out
metal sleeve, the self-resetting function of the damper is triggered under the action of
large earthquakes, and residual plastic deformation of the structure is reduced while the energy is efficiently consumed; meanwhile, the plastic deformation of the triggering self-resetting damper is mainly concentrated on the hollow-out
metal sleeve, so that the self-resetting damper can be quickly repaired by replacing components after the earthquakes.