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波浪地震耦合作用下悬浮隧道动力响应分析

罗刚 张玉龙 潘少康 任毅

罗刚, 张玉龙, 潘少康, 任毅. 波浪地震耦合作用下悬浮隧道动力响应分析[J]. 工程力学, 2021, 38(2): 211-220, 231. doi: 10.6052/j.issn.1000-4750.2020.05.0268
引用本文: 罗刚, 张玉龙, 潘少康, 任毅. 波浪地震耦合作用下悬浮隧道动力响应分析[J]. 工程力学, 2021, 38(2): 211-220, 231. doi: 10.6052/j.issn.1000-4750.2020.05.0268
LUO Gang, ZHANG Yu-long, PAN Shao-kang, REN Yi. DYNAMIC RESPONSE ANALYSIS OF SUBMERGED FLOATING TUNNELS TO COUPLED WAVE-SEISMIC ACTION[J]. Engineering Mechanics, 2021, 38(2): 211-220, 231. doi: 10.6052/j.issn.1000-4750.2020.05.0268
Citation: LUO Gang, ZHANG Yu-long, PAN Shao-kang, REN Yi. DYNAMIC RESPONSE ANALYSIS OF SUBMERGED FLOATING TUNNELS TO COUPLED WAVE-SEISMIC ACTION[J]. Engineering Mechanics, 2021, 38(2): 211-220, 231. doi: 10.6052/j.issn.1000-4750.2020.05.0268

波浪地震耦合作用下悬浮隧道动力响应分析

doi: 10.6052/j.issn.1000-4750.2020.05.0268
基金项目: 国家自然科学基金项目(51708042);陕西省自然科学基金项目(2019JQ-008)
详细信息
    作者简介:

    张玉龙(1995−),男,河南三门峡人,硕士生,主要从事悬浮隧道方面研究(E-mail: 2018221085@chd.edu.cn)

    潘少康(1994−),男,湖北天门人,硕士,主要从事悬浮隧道方面研究(E-mail: 1113852332@qq.com)

    任 毅(1995−),男,山西忻州人,硕士生,主要从事悬浮隧道方面研究(E-mail: renyi0106@qq.com)

    通讯作者:

    罗 刚(1985−),男,湖北天门人,副教授,博士,主要从事悬浮隧道与隧道施工方面研究(E-mail: luogang@chd.edu.cn)

  • 中图分类号: U459.5

DYNAMIC RESPONSE ANALYSIS OF SUBMERGED FLOATING TUNNELS TO COUPLED WAVE-SEISMIC ACTION

  • 摘要: 为了分析波浪地震耦合作用下悬浮隧道的动力响应,通过Stokes波浪理论和三角级数法计算了波浪荷载和地震荷载,基于D’Alembert原理建立了波浪地震耦合作用下悬浮隧道的管体-锚索模型。结合悬浮隧道待建工程对荷载参数和系统响应进行分析,结果表明:波浪地震耦合作用下悬浮隧道管体-锚索模型与锚索振动模型具有较好的一致性,但后者无法考虑系统的参数振动;地震的方向对悬浮隧道系统的响应具有显著影响,相同地震峰值加速度下水平地震作用所产生系统的响应要大于竖向地震作用,且锚索的响应大于管体;地震的峰值加速度与系统响应之间具有一定的函数关系,随地震荷载峰值加速度的增加系统的最大位移响应约呈线性增加趋势;在地震荷载的基础上考虑波浪荷载后系统的响应有所增大。随波浪波高和波长增加系统响应约呈线性增大,且较小波浪的周期(小于10 s)易引发系统的共振。
  • 图  1  地震设计加速度响应谱

    Figure  1.  Seismic design acceleration response spectrum

    图  2  悬浮隧道耦合振动系统

    Figure  2.  Coupled vibration system of SFT

    图  3  系统微分方程系统求解步骤

    Figure  3.  Steps of solving system differential equation

    图  4  不同地震波对悬浮隧道响应的影响

    Figure  4.  Impact of different seismic waves on responses of SFT

    图  5  不同地震方向及大小对悬浮隧道系统的影响

    Figure  5.  Impact of different seismic directions and PGA on responses of SFT system

    图  6  不同波浪参数对悬浮隧道响应的影响

    Figure  6.  Impact of different wave parameters on responses of SFT

    表  1  悬浮隧道系统基本参数

    Table  1.   Primary parameters of SFT system

    对象参数数值
    管体长度l/m500
    外径D/m15
    厚度Ω/m1
    弹性模量Etb/GPa35
    单位长度质量mtb/(kg/m)1.5×105
    锚索长度li/m160
    直径di/m0.346
    单位长度质量mi/(kg/m)1474.23
    弹性模量Ei/GPa210
    倾角αi/(°)60
    初张力Ti/kN2×104
    锚索间距h/m125
    波浪波高H/m2.83
    波长L/m78
    周期T/s7.76
    地震峰值加速度PGA/(m/s2)0.5 g
    持续时间Td/s40
    场地类别A
    下载: 导出CSV

    表  2  天然地震波参数

    Table  2.   Parameters of natural earthquakes

    序号123
    地震名Helena Montana-01Imperial Valley-02Humbolt Bay
    时间/年193519401937
    台站Carroll CollegeEl Centro Array #9Ferndale City Hall
    震级6.66.957.36
    震中距/km66.95.8
    场地类别CDD
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-05-03
  • 修回日期:  2020-08-11
  • 网络出版日期:  2021-01-16
  • 刊出日期:  2021-02-25

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