A multi-stage displacement control damper with intelligent monitoring function

Abstract

The invention discloses a multi-stage displacement control damper with an intelligent monitoring function. The damper includes structures such as a cylinder body, a piston rod, a piston assembly, and a limit elastic device. Different constitutive relations can achieve multi-stage vibration reduction and energy dissipation, effectively reducing the response of the bridge under external dynamic loads such as vehicles, fluctuating winds, and earthquakes; When the end displacement is too large, after exceeding the designed motion stroke of the multi-stage displacement control damper, it will play an elastic limit function to limit the further increase of the beam end displacement. The intelligent monitoring and evaluation system of the invention can feed back the performance state of the multi-stage displacement control damper in real time. The invention can not only meet the complex static and dynamic requirements of the bridge, but also can automatically feed back the performance state of the bridge itself, and can indirectly reflect the operation condition of the bridge, so as to provide a reliable basis for formulating the maintenance plan of the bridge.

Description

technical field [0001] The invention relates to the technical field of energy-consuming vibration damping devices, in particular to a multi-stage displacement control type damper with an intelligent monitoring function. Background technique [0002] Bridge shock absorption design, that is, through the use of shock absorption and energy dissipation devices, additional damping is provided to reduce the internal force and displacement response of the bridge under the action of earthquake. The commonly used shock absorption and energy dissipation devices in bridge engineering include viscous dampers, metal dampers, viscoelastic dampers, etc. Viscous dampers are the most widely used in bridge shock absorption design because of their advantages of strong energy dissipation capacity, stable performance, no introduction of main beam temperature stress, and no need to be replaced after earthquakes. The installation of viscous dampers between the main beams and pylons of long-span br...

AI Technical Summary

Problems solved by technology

According to monitoring data, some long-span bridges have a cumulative displacement of tens of kilometers per year under the action of vehicle loads, which poses a huge challenge to the service life of expansion joints, bearing sliding parts and damper seals. Their durability usually poor

[0005] (3) The viscous damper belongs to the structure of a closed cylinder body, and its sealing device, piston assembly, damping medium, etc. are all arranged inside the cylinder body. The complete loss of energy dissipation and vibration reduction can only be assessed when there is oil leakage, which brings great uncertainty to bridge safety.

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