• ISSN 1673-5722
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沉管隧道纵向抗震韧性评价方法研究

李心熙 禹海涛

李心熙,禹海涛,2023. 沉管隧道纵向抗震韧性评价方法研究. 震灾防御技术,18(1):37−43. doi:10.11899/zzfy20230105. doi: 10.11899/zzfy20230105
引用本文: 李心熙,禹海涛,2023. 沉管隧道纵向抗震韧性评价方法研究. 震灾防御技术,18(1):37−43. doi:10.11899/zzfy20230105. doi: 10.11899/zzfy20230105
Li Xinxi, Yu Haitao. Seismic Resilience Assessment for Longitudinal Response of Immersed Tunnels[J]. Technology for Earthquake Disaster Prevention, 2023, 18(1): 37-43. doi: 10.11899/zzfy20230105
Citation: Li Xinxi, Yu Haitao. Seismic Resilience Assessment for Longitudinal Response of Immersed Tunnels[J]. Technology for Earthquake Disaster Prevention, 2023, 18(1): 37-43. doi: 10.11899/zzfy20230105

沉管隧道纵向抗震韧性评价方法研究

doi: 10.11899/zzfy20230105
基金项目: 国家自然科学基金(41922059、42177134)
详细信息
    作者简介:

    李心熙,女,生于1995年。博士研究生。主要从事地下结构抗震研究工作。E-mail:2010049@tongji.edu.cn

    通讯作者:

    禹海涛,男,生于1983年。教授,博士生导师。主要从事地下结构防灾减灾研究工作。E-mail:yuhaitao@tongji.edu.cn

Seismic Resilience Assessment for Longitudinal Response of Immersed Tunnels

  • 摘要: 抗震韧性是评估结构抗震性能的重要手段,但目前对沉管隧道纵向抗震韧性评价的研究较缺乏。基于梁-弹簧模型建立能够合理考虑沉管隧道结构特征及接头构造的沉管隧道多尺度分析模型,选择合理的评估指标,根据不同极限状态定义获得地震易损性曲线,通过构建合理的性能恢复函数计算隧道韧性指数,从而建立沉管隧道抗震韧性评估方法,并以某沉管隧道实际工程为例进行隧道抗震韧性分析,揭示地震动强度及地层-结构相对刚度比等关键参数的影响规律。研究结果表明,随着PGA的增加,隧道震后剩余功能函数显著下降,隧道抗震韧性明显降低;隧道韧性指数随着地层-结构相对刚度比的增大而增大。
  • 图  1  沉管隧道多尺度模型

    Figure  1.  Multi-scale model of immersed tunnel

    图  2  抗震韧性评价方法模型(Bruneau,2007

    Figure  2.  Assessing model of seismic resilience (Bruneau, 2007

    图  3  有限元模型

    Figure  3.  Finite element model

    图  4  沉管隧道纵向地震易损性曲线

    Figure  4.  Longitudinal seismic fragility curves of immersed tunnel

    图  5  隧道性能恢复函数(FEMA,2020

    Figure  5.  Tunnel restoration curves (FEMA, 2020

    图  6  不同PGA下沉管隧道性能恢复曲线

    Figure  6.  Resilience curves of the recovery of functionality with time for immersed tunnel with different PGAs

    图  7  沉管隧道抗震韧性指数

    Figure  7.  Resilience index of immersed tunnel

    图  8  不同土-结构相对刚度比下沉管隧道抗震韧性指数

    Figure  8.  Resilience index with different soil-structure relative stiffness ratios

    表  1  损伤状态定义

    Table  1.   Definitions of Each Damage State

    损伤状态损伤指标范围
    正常使用管节接头相对张合量≤2 cm,最大错台量≤0.5 cm,M/MRd≤1
    轻微破坏管节接头相对张合量≤4 cm,最大错台量≤1 cm,M/MRd≤1.5
    中等破坏M/MRd≤2.5
    严重破坏M/MRd≤3.5
    下载: 导出CSV

    表  2  韧性等级划分(Huang等,2022

    Table  2.   Definitions of resilience grade(Huang et al., 2022

    韧性等级韧性指数R范围
    0.9≤R<1
    0.6≤R<0.9
    R<0.6
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-11-03
  • 刊出日期:  2023-03-31

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