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.
CN1916288AInactive Publication Date: 2007-02-21WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2007-02-21
Estimated Expiration
Not applicable · inactive patent

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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.
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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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