Speed locking type three-order yield damper capable of achieving self-resetting

Abstract

The invention discloses a speed locking type three-order yield damper capable of achieving self-resetting. The speed locking type three-order yield damper comprises a speed locking device, a three-order yield buckling-restrained brace and a self-resetting device which are sequentially connected. The speed locking device comprises a cylinder body, one end of the cylinder body is fixedly connected with a connecting cylinder, and the end, away from the cylinder body, of the connecting cylinder is fixedly connected with the third-order yield buckling-restrained brace. A piston rod is arranged in the cylinder body in a penetrating mode, one end of the piston rod penetrates through the cylinder body and then is fixedly connected with an end connecting piece, the other end of the piston rod penetrates through the cylinder body and then is movably arranged in the connecting cylinder, fluid media are arranged in the cylinder body, and a piston is arranged on the piston rod in a penetrating mode and located in the cylinder body and provided with a damping hole. The end connecting piece is used for being connected with a main body structure. According to the damper, a non-constraint form of a bridge structure in a normal use state and under an earthquake load is realized, the opening or closing of the damping device is judged according to the speed of the external load, the overall structural rigidity is changed, and the earthquake response is reduced.

Description

technical field [0001] The invention relates to the technical field of shock absorption and energy dissipation devices, in particular to a speed-locked third-order yield damper capable of realizing self-resetting. Background technique [0002] Cable-stayed bridges have been widely developed in coastal areas because of their excellent mechanical properties and good spanning ability. my country's coastal areas are located in the circum-Pacific seismic zone, which is mainly affected by the North China seismic zone and the southeast coastal seismic zone. As a key component of national infrastructure, bridge structures are particularly important in responding to earthquake disasters. [0003] In the 1990s, with the introduction of the theory of seismic isolation design, the anti-seismic method of sea-crossing bridges shifted from the traditional ductile anti-seismic design method to setting appropriate energy dissipation and anti-seismic devices at specific parts of the structure...

AI Technical Summary

Problems solved by technology

Sea-crossing cable-stayed bridges are greatly affected by temperature. Under normal operating conditions, the deformation of the main girder caused by temperature needs to be considered. The end of the ordinary anti-buckling support beam is directly connected to the main structure, which increases the rigidity of the structure and changes the constraint form. The temperature sub-internal force of the main structure of the bridge cannot be released, which increases the force demand of the main structure, which is not good for the structure

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