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    Determining Tensions in Suspension Bridge Anchor Span Strands at Their Erection Stage: An Analytical Method

    Source: Journal of Bridge Engineering:;2025:;Volume ( 030 ):;issue: 002::page 04024113-1
    Author:
    Wen-ming Zhang
    ,
    Xiao-yi Zhang
    ,
    Yu-peng Chen
    ,
    Xing-hang Shen
    DOI: 10.1061/JBENF2.BEENG-7093
    Publisher: American Society of Civil Engineers
    Abstract: During suspension bridge erection, tensions in its anchor span strands undergo continuous changes until the completed bridge state is attained. Calculating the precise tension values in the anchor span strands is critical to ensure the structural safety of the entire bridge under construction. To this end, an analytical method is proposed to determine the actual tensions in anchor span strands at the strand erection and tensioning stage, during which a temporary constraint on the splay saddle is removed as appropriate, and the resulting coupling relationship between strand tensioning and splay saddle rotation is considered. Then, based on the condition for moment equilibrium acting on the splay saddle, we determine the timing for letting the splay saddle stand on its own and the deflection angle of the splay saddle between the position with temporary constraint and that in the free-cable state. Further, the actual tensions in the anchor span strands are estimated during bridge erection. The proposed method ensures that the values of strand tensions and splay saddle position with all strands tensioned coincide with those required for the free-cable state. The innovation of this study is that it permits one to avoid the strand tension adjustment after tensioning the strands according to the values calculated by the proposed method. The performed calculations prove that strand tensions on the left and right sides are symmetrical before the temporary constraint of the splay saddle is removed and asymmetrical after this event. However, for the same layer of strands, the tensions on the two sides still tend to be symmetrical. The proposed analytical method is user-friendly and reliable, which was verified by a case study.
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      Determining Tensions in Suspension Bridge Anchor Span Strands at Their Erection Stage: An Analytical Method

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4304323
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    • Journal of Bridge Engineering

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    contributor authorWen-ming Zhang
    contributor authorXiao-yi Zhang
    contributor authorYu-peng Chen
    contributor authorXing-hang Shen
    date accessioned2025-04-20T10:15:20Z
    date available2025-04-20T10:15:20Z
    date copyright11/26/2024 12:00:00 AM
    date issued2025
    identifier otherJBENF2.BEENG-7093.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4304323
    description abstractDuring suspension bridge erection, tensions in its anchor span strands undergo continuous changes until the completed bridge state is attained. Calculating the precise tension values in the anchor span strands is critical to ensure the structural safety of the entire bridge under construction. To this end, an analytical method is proposed to determine the actual tensions in anchor span strands at the strand erection and tensioning stage, during which a temporary constraint on the splay saddle is removed as appropriate, and the resulting coupling relationship between strand tensioning and splay saddle rotation is considered. Then, based on the condition for moment equilibrium acting on the splay saddle, we determine the timing for letting the splay saddle stand on its own and the deflection angle of the splay saddle between the position with temporary constraint and that in the free-cable state. Further, the actual tensions in the anchor span strands are estimated during bridge erection. The proposed method ensures that the values of strand tensions and splay saddle position with all strands tensioned coincide with those required for the free-cable state. The innovation of this study is that it permits one to avoid the strand tension adjustment after tensioning the strands according to the values calculated by the proposed method. The performed calculations prove that strand tensions on the left and right sides are symmetrical before the temporary constraint of the splay saddle is removed and asymmetrical after this event. However, for the same layer of strands, the tensions on the two sides still tend to be symmetrical. The proposed analytical method is user-friendly and reliable, which was verified by a case study.
    publisherAmerican Society of Civil Engineers
    titleDetermining Tensions in Suspension Bridge Anchor Span Strands at Their Erection Stage: An Analytical Method
    typeJournal Article
    journal volume30
    journal issue2
    journal titleJournal of Bridge Engineering
    identifier doi10.1061/JBENF2.BEENG-7093
    journal fristpage04024113-1
    journal lastpage04024113-14
    page14
    treeJournal of Bridge Engineering:;2025:;Volume ( 030 ):;issue: 002
    contenttypeFulltext
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