Damper vibration reduction system for restraining vertical vibration of bridge girder

A vertical vibration and vibration reduction system technology, applied in bridges, bridge parts, bridge forms, etc., can solve the problem of inability to adapt to the longitudinal deformation and torsional motion of the stiffening beam, and achieve the effect of reducing the multi-order vortex vibration response

CN111981082AActive Publication Date: 2020-11-24HUNAN UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-11-24

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Abstract

The invention belongs to the field of vibration control, and particularly relates to a damper vibration reduction system for restraining vertical vibration of a bridge girder. The damper vibration reduction system comprises a bridge pier tower and the bridge girder, and further comprises a torsional damper connected to the bridge pier tower, the torsional damper is connected with a rotating shaftfor driving the torsional damper to output damping force, a first connecting rod is connected to the rotating shaft, the rotating shaft and the first connecting rod can rotate together, a second connecting rod is hinged to the end, away from the rotating shaft, of the first connecting rod, the second connecting rod is hinged to the bridge girder, and the first connecting rod is longitudinally arranged along the bridge girder. The damper vibration reduction system for restraining the vertical vibration of the bridge girder can be used for controlling the vertical vortex vibration of a stiffening girder of a suspension bridge, and can adapt to longitudinal deformation and torsional motion of the stiffening girder.
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Description

technical field

[0001] The invention belongs to the field of vibration control, and in particular relates to a damper vibration reduction system for suppressing vertical vibration of a bridge girder. Background technique

[0002] At present, the vertical bending modes of long-span suspension bridges are dense, the natural damping ratio is low, and vertical eddy vibrations may occur in the vertical bending modes with natural frequencies of 0.1-0.7 Hz, and the corresponding onset wind speed is 3.5-23 m / s. As the wind speed increases, vortex vibration occurs in multiple modes of the stiffened beam successively, and a specific wind speed corresponds to a vortex vibration in one mode, which is called multi-order vortex vibration phenomenon. For example, in the first half of 2020, my country's Wuhan Yingwuzhou Bridge, Guangdong Humen Bridge and Zhoushan Xihoumen Bridge successively experienced large-amplitude multi-mode vortex vibrations, which affected the normal operation of the...

Examples

Embodiment 1

[0038] Such as Figure 1-4 As shown, a damper vibration reduction system for suppressing the vertical vibration of the bridge girder described in this embodiment includes the bridge pier tower 23 and the bridge girder 22, and also includes a torsion type connected to the bridge pier tower 23 Damper 18, the torsional damper 18 is connected with a rotating shaft 24 for driving the torsional damper 18 to output damping force, the rotating shaft 24 is connected with a connecting rod 20, and the rotating shaft 24 can be connected with the The first connecting rod 20 rotates together, and the end of the first connecting rod 20 away from the rotating shaft 24 is hinged to the second connecting rod 21, and the second connecting rod 21 is hinged to the main girder 22 of the bridge.

[0039] It also includes a supporting platform 19, one end of the supporting platform 19 is fixedly connected (it can be integrally poured and connected, or it can be detachably fixedly connected with bolts...