落石冲击下隧道大跨度棚洞的动力响应数值分析与抗冲击研究

王爽 周晓军 姜波 周跃峰

王爽, 周晓军, 姜波, 周跃峰. 落石冲击下隧道大跨度棚洞的动力响应数值分析与抗冲击研究[J]. 爆炸与冲击, 2016, 36(4): 548-556. doi: 10.11883/1001-1455(2016)04-0548-09
引用本文: 王爽, 周晓军, 姜波, 周跃峰. 落石冲击下隧道大跨度棚洞的动力响应数值分析与抗冲击研究[J]. 爆炸与冲击, 2016, 36(4): 548-556. doi: 10.11883/1001-1455(2016)04-0548-09
Wang Shuang, Zhou Xiaojun, Jiang Bo, Zhou Yuefeng. Numerical analysis of dynamic response and impact resistance of a large-span rock shed in a tunnel under rockfall impact[J]. Explosion And Shock Waves, 2016, 36(4): 548-556. doi: 10.11883/1001-1455(2016)04-0548-09
Citation: Wang Shuang, Zhou Xiaojun, Jiang Bo, Zhou Yuefeng. Numerical analysis of dynamic response and impact resistance of a large-span rock shed in a tunnel under rockfall impact[J]. Explosion And Shock Waves, 2016, 36(4): 548-556. doi: 10.11883/1001-1455(2016)04-0548-09

落石冲击下隧道大跨度棚洞的动力响应数值分析与抗冲击研究

doi: 10.11883/1001-1455(2016)04-0548-09
详细信息
    作者简介:

    王爽(1990-),男,硕士,417429202@qq.com

  • 中图分类号: O342

Numerical analysis of dynamic response and impact resistance of a large-span rock shed in a tunnel under rockfall impact

  • 摘要: 为研究大跨度棚洞在落石冲击下的力学性能以及轻质土的抗冲击性能,根据所确定的落石冲击能量,利用动力有限元数值方法对山岭隧道大跨度棚洞受落石冲击作用的动力响应进行了分析,研究了棚洞钢筋混凝土结构受落石冲击作用的损伤特性,将不同工况下的冲击深度时程曲线和冲击力时程曲线进行了对比,比较了棚洞顶部回填普通土和轻质土时对落石冲击作用的缓冲效果,并给出了棚洞顶部回填材料及其回填土厚度的建议。
  • 图  1  棚洞结构

    Figure  1.  Shed tunnel

    图  2  棚洞有限元模型

    Figure  2.  FE model of shed tunnel

    图  3  冲击深度时程曲线

    Figure  3.  History curve of impact depth

    图  4  冲击力时程曲线

    Figure  4.  History curve of impact forth

    图  5  钢筋瞬时应力

    Figure  5.  Instantaneous stress of steel

    图  6  钢筋的α值与冲击能量关系曲线

    Figure  6.  α values of the steel vs. impact energies

    图  7  位移曲线

    Figure  7.  Displacement curve

    图  8  冲击力时程对比

    Figure  8.  Time-history curve for impact force

    图  9  冲击深度时程对比

    Figure  9.  Time-history curve for impact depth

    图  10  钢筋静应力

    Figure  10.  Static stress of steel

    图  11  钢筋瞬时应力

    Figure  11.  Instantaneous stress of steel

    图  12  α

    Figure  12.  Values of α

    图  13  静位移

    Figure  13.  Static displacement

    图  14  动位移

    Figure  14.  Dynamic displacement

    图  15  稳定位移

    Figure  15.  Stable displacement

    表  1  材料参数

    Table  1.   Parameters of materials

    材料 ρ/(kg·m-3) E/MPa ν
    混凝土 2 500 - -
    钢筋 7 800 2.06×105 0.12
    土垫层 1 500 15 0.35
    落石 2 500 5.0×104 0.3
    下载: 导出CSV

    表  2  不同冲击能量下混凝土损伤体积

    Table  2.   Damage volume of concrete vs. different impact energies

    Ei/kJ V/m3 ηV/%
    框架 盖板 框架 盖板
    65 1.15 0 0.76 0
    130 1.73 0 1.14 0
    260 2.14 0.58 1.42 2.26
    520 3.90 1.02 2.58 4.02
    1 040 7.74 1.79 5.12 7.04
    下载: 导出CSV

    表  3  不同垫层混凝土损伤体积对比

    Table  3.   Comparison of concrete damage with different cushionss

    垫层 V/m3 ηV/%
    框架 盖板 框架 盖板
    土垫层 2.144 0.576 1.42 2.26
    轻质土 2.032 0 1.34 0
    下载: 导出CSV

    表  4  钢筋应力对比

    Table  4.   Comparison of steel stress

    垫层 σi/MPa α/m ηα/%
    框架 盖板 框架 盖板 框架 盖板
    土垫层 95.3 78.9 172.8 120.8 7.35 5.53
    轻质土 95.0 22.9 133.6 11.2 5.68 0.51
    下载: 导出CSV

    表  5  位移对比

    Table  5.   Comparison of displacement

    垫层 s0/mm si/mm ss/mm
    框架 盖板 框架 盖板 框架 盖板
    土垫层 2.7 3.9 2.0 2.4 0.4 0.6
    轻质土 2.2 3.4 2.0 2.4 0.2 0.2
    下载: 导出CSV

    表  6  不同垫层厚度下混凝土损伤体积

    Table  6.   Damage volume of concerte at different thicknesses

    l/m V/m3 ηV/%
    框架 盖板 框架 盖板
    0.6 1.79 0.43 1.18 1.70
    1.0 1.84 0 1.22 0
    1.4 2.03 0 1.34 0
    1.8 2.06 0 1.36 0
    2.2 2.25 0 1.49 0
    下载: 导出CSV
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出版历程
  • 收稿日期:  2014-09-03
  • 修回日期:  2014-12-25
  • 刊出日期:  2016-07-25

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