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Hybrid system for controlling longitudinal vibration reaction of girder of cable stayed bridge in float type

A technology of longitudinal vibration and mixed control, which is applied in bridges, bridge parts, bridge construction, etc., and can solve the problems of poor longitudinal vibration response of main girders and complex structural design, etc.

Inactive Publication Date: 2007-02-21
WUHAN UNIV OF TECH
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Problems solved by technology

Although it should also belong to the scope of floating cable-stayed bridges, the structural design of such bridges is more complicated because of the added load caused by the braking and running of railway trains on its main girder
[0003] Although the conventional fluid dampers installed longitudinally at the connection between the bridge tower and the main girder can effectively suppress the longitudinal seismic response of the main girder of this type of bridge, the damping effect on the longitudinal vibration response of the main girder caused by the braking and running of the train is poor. very poor

Method used

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  • Hybrid system for controlling longitudinal vibration reaction of girder of cable stayed bridge in float type
  • Hybrid system for controlling longitudinal vibration reaction of girder of cable stayed bridge in float type
  • Hybrid system for controlling longitudinal vibration reaction of girder of cable stayed bridge in float type

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and examples, but these examples should not be construed as limiting the present invention.

[0014] In the present invention, several MR dampers 4 and fluid dampers 3 are placed between the main girder 2 and the longitudinal direction of the bridge tower 1 along the transverse direction, wherein one end of each damper passes through the damper support 5 and the damper spacer 7 and The bridge beam 1 is connected, and the other end of each damper is connected with the lower chord of the main beam 2 through the damper support 5 and the damper connector 6, and several The vertical support 8 of the main beam that can move horizontally along the longitudinal direction.

[0015] When a train travels and brakes on the main girder of a cable-stayed bridge, its dynamic action will cause a relatively large longitudinal vibration of the main girder. Since the longitudinal vibration...

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Abstract

The present invention relates to a mixed control system of main beam longitudinal vibration reaction of floated type cable-stayed bridge. It is characterized by that in the bridge tower and bridge main beam connected place of said highway and railway dual-purpose or railway special-purpose floated cable-stayed bridge the MR damper and fluid damper are longitudinally set and combined together. Said invention also provides the control method of said mixed control system, and said control method includes the following steps: utilizing fluid damper to provide fluid damping force of unadjustable parameter, utilizing MR damper to provide coulomb damping force of adjustable parameter, then utilizing longitudinal relative displacement reaction of main beam and bridge tower and longitudinal speed reaction of bridge tower to actively regulate amplitude of coulomb damping force so as to inhibit the main beam longitudinal vibration reation of said cable-stayed bridge which is resulted from train brake and train running.

Description

technical field [0001] The invention belongs to the field of bridge structure engineering, and specifically relates to a hybrid control system for the longitudinal vibration response of the main girder of a floating cable-stayed bridge caused by train braking and running for both road and rail (or special for railway). technical background [0002] The floating cable-stayed bridge is a structural type of long-span bridge. Because the main girder is not restrained in the longitudinal direction, the main girder will produce a large longitudinal vibration response under the action of longitudinal earthquake and other disturbances. In this regard, the conventional practice is to install a fluid damper in the longitudinal direction of the connection between the main girder and the bridge tower to suppress the longitudinal vibration response of the main girder. The floating cable-stayed bridge for road and rail (or for railway) is a new type of long-span ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00E04B1/98E01D12/00
Inventor 瞿伟廉秦顺全涂建维刘嘉
Owner WUHAN UNIV OF TECH
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