Dragline anchoring end damper based on viscous fluids and spring damping

Abstract

The invention relates to a dragline anchoring end damper based on viscous fluids and spring damping. The dragline anchoring end damper comprises an outer barrel, an oil cylinder and an inner barrel. The oil cylinder and the inner barrel are arranged in the outer barrel. The bottom surface of the oil cylinder is connected with a bottom steel anchoring rope. A piston is arranged in the oil cylinder,and is fixedly connected with a connection rod. The connection rod penetrates a through hole in the top face of the oil cylinder to be fixedly connected with the bottom of the inner barrel. The piston is sealed with the wall of the oil cylinder. The connection rod is sealed with the through hole in the top face of the oil cylinder. The top face of the oil cylinder is connected with the piston through at least two strong springs. The upper portion of the inner barrel is connected with an upper steel anchoring rope. The upper steel anchoring rope vibrates under the action of dynamic load to pull the inner barrel to move, the connection rod is driven to move, and the piston is driven by the connection rod to move. The dragline anchoring end damper has the advantages that the oil cylinder generates fluid damping force to coordinate with the springs for joint damping, internal force and sudden displacement change of cable-stayed bridges under the action of the momentary dynamic load are controlled effectively without reduction of dragline rigidity, and burdens at dragline anchoring ends are reduced.

Description

technical field [0001] The invention relates to the field of civil engineering bridge engineering and the field of structural vibration reduction control, in particular to a cable anchorage end damper based on viscous fluid and spring damping. Background technique [0002] The cables of cable-stayed bridges are prone to large-scale wind vibration, wind and rain vibration and parametric vibration. In the prior art, measures to reduce vibration response of cable-stayed bridges mainly include (1) adjusting cable-stayed bridge tower layout and optimizing component size; (2) improving cable-stayed bridge stiffness; (3) installing vibration-reducing control devices. Under the premise that the structural function of the cable-stayed bridge is determined, it is difficult to adjust the layout of its cable towers; and increasing the stiffness of the cable-stayed bridge will inevitably increase the cross-sectional size of key components, which not only increases the construction diffic...

AI Technical Summary

Problems solved by technology

Ordinary cable-stayed bridge cables are generally directly anchored at the end of the main girder, and external dampers are used to reduce vibration. When the displacement of the cables due to vibration is not large, the vibration reduction effect is not ideal

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