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    Reliable Fatigue-Life Assessment of Short Steel Hanger in a Rigid Tied Arch Bridge Integrating Multiple Factors

    Source: Journal of Performance of Constructed Facilities:;2018:;Volume ( 032 ):;issue: 004
    Author:
    Song Yong-sheng;Ding You-liang;Zhong Wen;Zhao Hanwei
    DOI: 10.1061/(ASCE)CF.1943-5509.0001183
    Publisher: American Society of Civil Engineers
    Abstract: With higher requirements in stiffness and strength, the running safety of high-speed railway bridges is more sensitive to structural damage. Compared with long steel hangers, short steel hangers sustain greater damage under the action of high-speed trains. In this article, a reliable fatigue-life assessment method of short hangers was established and proposed, integrating multiple factors. These factors include bending-axial behavior, environmental corrosion, transverse location of trains, train weight, and traffic flow. As a case study, this method was applied as a reliable fatigue-life assessment of the short steel hangers of the Dashengguan high-speed railway bridge. Using mass strain data measured by structural health monitoring system (SHMS), multiorder Gaussian distributions (MGDs) were first used to obtain the probabilistic distribution of fatigue effects with multiple peaks. The Monte Carlo counting method was then used to calculate failure probability and corresponding fatigue reliability index. The influence of environmental corrosion, train weight, and traffic flow on reliable fatigue-life were finally investigated by comparing fatigue reliability index with the defined target value. Consequently, under the combined actions of environmental corrosion, increase of train weight, and traffic flow, the reliable fatigue-life may be less than 1 years, indicating that the short steel hangers of this bridge may suffer from the significant risk of fatigue cracking during the design life of the bridge.
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      Reliable Fatigue-Life Assessment of Short Steel Hanger in a Rigid Tied Arch Bridge Integrating Multiple Factors

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    contributor authorSong Yong-sheng;Ding You-liang;Zhong Wen;Zhao Hanwei
    date accessioned2019-02-26T07:39:03Z
    date available2019-02-26T07:39:03Z
    date issued2018
    identifier other%28ASCE%29CF.1943-5509.0001183.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4248503
    description abstractWith higher requirements in stiffness and strength, the running safety of high-speed railway bridges is more sensitive to structural damage. Compared with long steel hangers, short steel hangers sustain greater damage under the action of high-speed trains. In this article, a reliable fatigue-life assessment method of short hangers was established and proposed, integrating multiple factors. These factors include bending-axial behavior, environmental corrosion, transverse location of trains, train weight, and traffic flow. As a case study, this method was applied as a reliable fatigue-life assessment of the short steel hangers of the Dashengguan high-speed railway bridge. Using mass strain data measured by structural health monitoring system (SHMS), multiorder Gaussian distributions (MGDs) were first used to obtain the probabilistic distribution of fatigue effects with multiple peaks. The Monte Carlo counting method was then used to calculate failure probability and corresponding fatigue reliability index. The influence of environmental corrosion, train weight, and traffic flow on reliable fatigue-life were finally investigated by comparing fatigue reliability index with the defined target value. Consequently, under the combined actions of environmental corrosion, increase of train weight, and traffic flow, the reliable fatigue-life may be less than 1 years, indicating that the short steel hangers of this bridge may suffer from the significant risk of fatigue cracking during the design life of the bridge.
    publisherAmerican Society of Civil Engineers
    titleReliable Fatigue-Life Assessment of Short Steel Hanger in a Rigid Tied Arch Bridge Integrating Multiple Factors
    typeJournal Paper
    journal volume32
    journal issue4
    journal titleJournal of Performance of Constructed Facilities
    identifier doi10.1061/(ASCE)CF.1943-5509.0001183
    page4018038
    treeJournal of Performance of Constructed Facilities:;2018:;Volume ( 032 ):;issue: 004
    contenttypeFulltext
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