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Investigation and control of excessive cumulative girder movements of long-span steel suspension bridges
Highlights Premature damage to expansion joints and bearings is field examined. Small but fast girder movements are found to be the mainly reason of damage. Effectiveness of applied damage control measures is evaluated. A supplementary control measure using viscous dampers is suggested. Influence of damper parameters is discussed using the transient FE analyses.
Abstract This paper presents an investigation on the premature damage to expansion joints and bearings of long-span suspension bridges, in which failure patterns, locations and mechanism are presented and discussed. According to the field monitoring and time-and frequency-domain analyses, it is observed that the small but rapid girder movements contributed mostly to the large cumulative movements, resulting in accelerated fatigue damage and wear of expansion joints and bearings. Several damage mitigation measures were applied, including the use of more durable friction material, more control springs and movement restraint belts, and their effectiveness is examined through field observation. A supplementary control measure using viscous dampers is finally suggested and the influence of various damper parameters is discussed based on the proposed transient finite element analysis method.
Investigation and control of excessive cumulative girder movements of long-span steel suspension bridges
Highlights Premature damage to expansion joints and bearings is field examined. Small but fast girder movements are found to be the mainly reason of damage. Effectiveness of applied damage control measures is evaluated. A supplementary control measure using viscous dampers is suggested. Influence of damper parameters is discussed using the transient FE analyses.
Abstract This paper presents an investigation on the premature damage to expansion joints and bearings of long-span suspension bridges, in which failure patterns, locations and mechanism are presented and discussed. According to the field monitoring and time-and frequency-domain analyses, it is observed that the small but rapid girder movements contributed mostly to the large cumulative movements, resulting in accelerated fatigue damage and wear of expansion joints and bearings. Several damage mitigation measures were applied, including the use of more durable friction material, more control springs and movement restraint belts, and their effectiveness is examined through field observation. A supplementary control measure using viscous dampers is finally suggested and the influence of various damper parameters is discussed based on the proposed transient finite element analysis method.
Investigation and control of excessive cumulative girder movements of long-span steel suspension bridges
Guo, Tong (author) / Liu, Jie (author) / Huang, Lingyu (author)
Engineering Structures ; 125 ; 217-226
2016-07-02
10 pages
Article (Journal)
Electronic Resource
English
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