Vibration reducing device for restraining wind-induced vibration of lifting rod of large-span suspension bridge

Abstract

The invention discloses a vibration reducing device for restraining wind-induced vibration of a lifting rod of a large-span suspension bridge, which is an auxiliary cable net system arranged on a suspension bridge lifting rod (2); the auxiliary cable net system is a netty structure formed by across arranging multiple auxiliary cables (1); included angles between the auxiliary cables (1) and the lifting rod (2) are 30-70 degrees; and in a connecting area (8) of the auxiliary cables and the lifting rod, the auxiliary cables (1) and the lifting rod (2) are fixedly connected by bolts through two second connecting devices (10) at two sides of the lifting rod (2), connecting clamping pieces (81) of two auxiliary cables at two sides of the two second connecting devices (10) and the lifting rod and rubber washers between the connecting clamping pieces (81) of the auxiliary cables and the lifting rod and the lifting rod (2). The vibration reducing device is simple in connecting structure, has the advantages of convenience for installation and maintenance construction, and can be convenient to replace cable bodies in the use period.

Description

technical field [0001] The invention belongs to the technical field of engineering structures, and relates to a damping device for suppressing wind-induced vibration of suspension rods of large-span suspension bridges. Background technique [0002] In windy weather, the suspenders of super-long suspension bridges may undergo various vibrations under the action of wind. Due to the large length of the booms and the small spacing, the booms may collide with each other and be damaged. At present, there are only some parallel auxiliary cable-net vibration damping systems for medium and short suspension bridges at home and abroad, and there are no suspender vibration suppression devices for ultra-long cross-border ultra-long suspender systems. [0003] At present, vibration reduction methods mainly include installing damping devices, adopting separate design or adopting interference design. The installed damper can absorb the energy of the structure in the structural vibration, ...

AI Technical Summary

Problems solved by technology

First of all, the boom is generally arranged vertically, and the traditional damper cannot be installed, and the vibration reduction effect of the traditional damper can only be adapted to the medium-length inclined boom. Whether it can be applied to the super-long boom in the future remains to be discussed.

The main reason for the vibration of the boom is the excitation of the wind. At present, there is no way to separate the boom from the external wind environment, so the separation design cannot be adopted

At present, the turbulence design on bridges is mainly aimed at vibration forms such as wind and rain vibration, and there are many forms of boom vibration, which cannot be suppressed only by turbulence.

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