顶爆作用下裂隙对锚固洞室振动速度的影响

王光勇 裴晨浩 林加剑

王光勇, 裴晨浩, 林加剑. 顶爆作用下裂隙对锚固洞室振动速度的影响[J]. 高压物理学报, 2019, 33(2): 025201. doi: 10.11858/gywlxb.20180602
引用本文: 王光勇, 裴晨浩, 林加剑. 顶爆作用下裂隙对锚固洞室振动速度的影响[J]. 高压物理学报, 2019, 33(2): 025201. doi: 10.11858/gywlxb.20180602
WANG Guangyong, PEI Chenhao, LIN Jiajian. Vibration Velocities of Anchorage Caverns with Cracks under Top Explosion[J]. Chinese Journal of High Pressure Physics, 2019, 33(2): 025201. doi: 10.11858/gywlxb.20180602
Citation: WANG Guangyong, PEI Chenhao, LIN Jiajian. Vibration Velocities of Anchorage Caverns with Cracks under Top Explosion[J]. Chinese Journal of High Pressure Physics, 2019, 33(2): 025201. doi: 10.11858/gywlxb.20180602

顶爆作用下裂隙对锚固洞室振动速度的影响

doi: 10.11858/gywlxb.20180602
基金项目: 国家自然科学基金(51304067);河南省高等学校青年骨干教师资助计划(2015GGJS-069)
详细信息
    作者简介:

    王光勇(1977-),男,博士,副教授,主要从事岩土工程动载试验研究.E-mail:wgy2003@mail.ustc.edu.cn

  • 中图分类号: O347.1; TU457

Vibration Velocities of Anchorage Caverns with Cracks under Top Explosion

  • 摘要: 基于相似模型试验,利用数值分析方法研究了含裂隙锚固洞室在顶爆作用下质点峰值振速的分布规律,并探讨了裂隙倾角和长度对峰值振速的影响。结果表明:裂隙和洞室表面在迎爆侧存在振速放大效应,洞室两侧和底部振速远小于拱顶;随着裂隙长度的增加,锚固洞室拱顶、拱脚和两帮峰值振速先减小后增加再减小,除了长度较短的情况,裂隙的存在使锚固洞室拱顶的峰值振速增加;随着裂隙向右倾斜的倾角增加,拱脚和两帮的峰值振速出现不对称,洞室右边的拱脚和侧帮峰值振速大于左边;拱顶峰值振速先减小后增加,倾角为45°时拱顶峰值振速最小,相较无裂隙洞室降低了48.2%,有效减弱了结构的动力响应。

     

  • 图  模型简图(单位:cm)

    Figure  1.  Model diagram (Unit: cm)

    图  爆炸压力时程曲线

    Figure  2.  Time history curve of blasting pressure

    图  模拟和实测压应力时程曲线对比

    Figure  3.  Pressure curves comparison between simulation and test

    图  损伤的模拟结果与试验结果对比

    Figure  4.  Damage comparison between simulation and test

    图  振速监测点分布(单位:cm)

    Figure  5.  Distribution of vibration speed monitoring points (Unit: cm)

    图  裂隙长度为30 cm时质点振动速度时程曲线

    Figure  6.  Time history curves of particle vibration velocity of 30 cm-long crack

    图  不同裂隙长度下质点峰值振动速度衰减曲线

    Figure  7.  Decay curve of particle peak vibration velocity under different crack lengths

    图  不同裂隙长度下拱顶质点峰值振动速度

    Figure  8.  vp of vault under different crack lengths

    图  不同裂隙长度下拱脚质点峰值振动速度

    Figure  9.  vp of arch springing under different crack lengths

    图  10  不同裂隙长度下侧帮质点峰值振动速度

    Figure  10.  vp of side wall under different crack lengths

    图  11  不同裂隙长度下底板质点峰值振动速度

    Figure  11.  vp of floor under different crack lengths

    图  12  质点振动速度矢量图

    Figure  12.  Vector graph of particle vibration velocity

    图  13  不同裂隙倾角下拱顶质点峰值振动速度

    Figure  13.  vp of vault under different crack inclination angles

    图  14  不同裂隙倾角下拱脚质点峰值振动速度

    Figure  14.  vp of arch springing under different crack inclination angles

    图  15  不同裂隙倾角下侧帮质点峰值振动速度

    Figure  15.  vp of side walls under different crack inclination angles

    图  16  不同裂隙倾角下底板质点峰值振动速度

    Figure  16.  vp of floor under different crack inclination angles

    表  1  CDP模型参数

    Table  1.   Parameters of CDP model

    Density/(g·cm-3)$E$/GPaμDilation angle/(°)Eccentricityσb0/σc0KViscosity paramenter
    1.82.030.16250.11.160.666 670
    下载: 导出CSV

    表  2  洞室质点峰值振动速度

    Table  2.   Particle peak vibration velocity of cavern

    Inclination angleParticle peak vibration velocity/(m·s-1)
    VaultLeft arch springingRight arch springingLeft side wallRight side wallFloor
    Non-crack1.640.880.880.490.490.15
    2.040.670.670.510.510.19
    30°1.250.510.570.430.440.17
    45°0.850.440.670.420.490.15
    60°0.960.530.760.420.520.16
    90°1.450.770.770.490.490.15
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-07-20
  • 修回日期:  2018-08-10

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