Novel bridge vortex-induced vibration suppression device replacing protective guard

Abstract

The novel bridge vortex-induced vibration suppression device is characterized in that the novel bridge vortex-induced vibration suppression device comprises a plurality of suppression assemblies composed of protective railings and grids, the protective railings are longitudinally arranged on a bridge floor main beam, heightening grids are transversely arranged at the bottoms of the protective railings, and the grids are transversely arranged at the upper portions of the protective railings; the centers of the two ends of the grid and the heightening grid are movably connected with the protective barrier and can be turned over and opened around the joint. According to the utility model, the formation of vortex vibration is inhibited from the source, the grid can be completely opened at a dangerous wind speed, the wind drag coefficient is reduced, the main beam is prevented from being subjected to an overlarge wind drag load, and the opening height of the grid can be adjusted in a targeted manner by the intelligent grid according to the condition of the wind speed, so that the generation of eddy current of the whole bridge is better inhibited. The system is an important component ofan intelligent control system.

Description

technical field [0001] The invention relates to a suppressing device, in particular to a novel bridge vortex-induced vibration suppressing device which replaces a guardrail. Background technique [0002] In early May 2020, the vortex-induced wind vibration of the Guangzhou Humen Bridge caused the bridge deck to vibrate significantly up and down, which aroused widespread concern from all walks of life. The vortex-induced vibration of the main girder of the bridge belongs to the environmental excitation. Its mechanism is: when the wind blows over the main girder, it is divided into wakes on both sides by the main girder, and periodic vortices will be generated in the wake, and the vortices in the wakes on both sides will Alternate falling off, so that the wind pressure on the surface of the main girder produces periodic changes and the corresponding periodic changes in force. When this periodically changing force (vortex induced load) causes periodic forced vibration of the m...

AI Technical Summary

Problems solved by technology

However, aerodynamic grilles are generally used as split beam deck structures; while dampers and deflectors are most effective at specific wind speeds because their dampening effect is most effective at specific wind speeds, they may be less effective as wind speeds change

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