Dual-order-sliding large-rigidity friction damper

Abstract

The invention provides a dual-order-sliding large-rigidity friction damper, and relates o the technical field of construction engineering. The dual-order-sliding large-rigidity friction damper comprises an H-shaped steel beam section, angle steel, side web plates, steel cover plates and friction-type high-strength bolts; the side web plates are welded on the lower surface of an H-shaped-steel-beam-section lower flange; an H-shaped-steel-beam-section web plate, the side web plates and the H-shaped-steel-beam-section lower flange are broken at some cross section of the steel beam section, and agap with the certain distance is formed; the steel cover plates stride the gap and are attached to the two sides of the side web plates, and are connected through the friction-type high-strength bolts; corresponding to the position of the gap, the angle steel is connected with the H-shaped-steel-beam-section web plate and the inner surface of an H-shaped-steel-beam-section upper flange through welding; one side of the gap of the side web plates is a first-order sliding side, and the other side of the gap of the side web plates is a second-order sliding side; the bearing capacity of the second-order sliding side is larger than the bearing capacity of the first-order sliding side. The dual-order-sliding large-rigidity friction damper is large in sliding route and rotating rigidity and high in bearing capacity, and has the good energy dissipation and seismic mitigation performance.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a double-stage sliding large-rigidity friction damper. Background technique [0002] In recent years, with the frequent occurrence of earthquakes around the world, and in order to meet the ever-increasing development needs of engineering structures, the passive control theory of structural shock absorption has been widely used, which breaks through the traditional way of consuming seismic energy by relying on the ductility of the structure itself. The anti-seismic method mainly relies on the external energy dissipation device to consume the seismic energy and reduce or even eliminate the damage of the main structure. [0003] Friction damper is an energy-dissipating device attached to the structure, which dissipates energy through sliding friction, and plays an energy-dissipating and shock-absorbing role in the structure. During small earthquakes, the structure ...

AI Technical Summary

Problems solved by technology

[0004] However, for the current friction dampers, generally the rotation stiffness is low, the stroke is insufficient, and there is a constant sliding friction force. When the slip damping force is set high, the damper may not slip or may slip after sliding. Non-recoverable residual deformation; if the damping force is set too low, the required damping force will not be provided, resulting in a reduction in the damping capacity of the damper

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