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考虑淤砂层的理想流体层中悬浮隧道管体动力水荷载研究—SV波

林亨 吴冬雁 赵俊亮

林亨, 吴冬雁, 赵俊亮. 考虑淤砂层的理想流体层中悬浮隧道管体动力水荷载研究—SV波[J]. 工程力学, 2022, 39(8): 114-121. doi: 10.6052/j.issn.1000-4750.2021.04.0295
引用本文: 林亨, 吴冬雁, 赵俊亮. 考虑淤砂层的理想流体层中悬浮隧道管体动力水荷载研究—SV波[J]. 工程力学, 2022, 39(8): 114-121. doi: 10.6052/j.issn.1000-4750.2021.04.0295
LIN Heng, WU Dong-yan, ZHAO Jun-liang. EFFECT OF SEDIMENT MODEL ON DYNAMIC PRESSURES OF SUBMERGED FLOATING TUNNEL DUE TO SV WAVE INCIDENCE[J]. Engineering Mechanics, 2022, 39(8): 114-121. doi: 10.6052/j.issn.1000-4750.2021.04.0295
Citation: LIN Heng, WU Dong-yan, ZHAO Jun-liang. EFFECT OF SEDIMENT MODEL ON DYNAMIC PRESSURES OF SUBMERGED FLOATING TUNNEL DUE TO SV WAVE INCIDENCE[J]. Engineering Mechanics, 2022, 39(8): 114-121. doi: 10.6052/j.issn.1000-4750.2021.04.0295

考虑淤砂层的理想流体层中悬浮隧道管体动力水荷载研究—SV波

doi: 10.6052/j.issn.1000-4750.2021.04.0295
基金项目: 浙江省自然科学基金青年项目(LQ15E080006);国家自然科学基金青年项目(51508415)
详细信息
    作者简介:

    吴冬雁(1985−),女,浙江人,副教授,博士,硕导,主要从事桥梁结构动力特性研究(E-mail: zjwzwudongyan@163.com)

    赵俊亮(1986−),男,浙江人,副教授,博士,硕导,主要从事结构抗震减灾研究(E-mail: zhaojunliang@wzu.edu.cn)

    通讯作者:

    林 亨(1994−),男,浙江人,讲师,博士,主要从事悬浮隧道动力特性方面研究(E-mail: cehlin@wzu.edu.cn)

  • 中图分类号: U459.5

EFFECT OF SEDIMENT MODEL ON DYNAMIC PRESSURES OF SUBMERGED FLOATING TUNNEL DUE TO SV WAVE INCIDENCE

  • 摘要: 为研究地震SV波对复杂海水环境中悬浮隧道管体动力水荷载的影响,考虑海洋沉积淤砂层的作用构建理论分析模型。根据不同介质材料的波动方程和位移势函数,结合地震SV波传播过程中的边界条件,基于MATLAB推导并求解了不同交界面处地震SV波的透射和反射系数理论方程。通过数值算例,分析了淤砂层饱和程度、入射波角度和锚索布置形式等参数对悬浮隧道管体动力水荷载的影响。计算结果表明:悬浮隧道结构在非饱和淤砂层体系中,相比在饱和淤砂层体系中承受更大动力水荷载的影响;较厚淤砂层对悬浮隧道在地震SV波作用下更为有利;增加锚索支撑刚度和减小锚索布置间距,能够降低地震SV波对悬浮隧道动力水荷载的影响。
  • 图  1  悬浮隧道在SV波作用下的简化理论模型

    Figure  1.  Analytical model of the SFT with SV-wave incidence

    图  2  SV波入射动力水荷载随着水深的变化情况

    Figure  2.  Distribution of dynamic pressure along seawater depth SV-wave incidence

    图  3  不同淤砂层饱和度对悬浮隧道位置动力水荷载的影响

    Figure  3.  Effect of saturation degree of porous medium on dynamic pressure at SFT position (h3=0.3H)

    图  4  不同入射角度对悬浮隧道位置动力水荷载的影响

    Figure  4.  Effect of incident angle on dynamic pressure at SFT positon (h3=0.3H)

    图  5  不同锚索布置系数对悬浮隧道动力水荷载的影响

    Figure  5.  Effect of tether layout coefficient on dynamic pressure at SFT position (h3=0.3H)

    表  1  不同介质层交界面处的水动力荷载

    Table  1.   Dynamic pressure results at the interface of the system

    入射角θ=25°
    水深$h_1^ - $$h_1^ + $dev$h_3^ - $$h_3^ + $dev
    无淤砂层3.053.050.001.641.21−0.43
    饱和淤砂层2.862.870.011.551.21−0.34
    非饱和淤砂层(99.5%)3.704.020.321.831.39−0.44
    入射角θ=45°
    水深$h_1^ - $$h_1^ + $dev$h_3^ - $$h_3^ + $dev
    无淤砂层3.463.460.001.791.43−0.36
    饱和淤砂层3.293.300.011.711.42−0.29
    非饱和淤砂层(99.5%)4.534.900.372.111.72−0.39
    注:dev表示h+h交界面处的动水压力差值。
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-04-20
  • 修回日期:  2021-07-20
  • 网络出版日期:  2021-07-28
  • 刊出日期:  2022-08-01

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