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Volume 33 Issue 2
Apr 2019
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Chinese Journal of High Pressure Physics  > 2019  >  33(2): 025201.
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
shu

Vibration Velocities of Anchorage Caverns with Cracks under Top Explosion

doi: 10.11858/gywlxb.20180602
  • 1.

    School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, China

  • 2.

    College of Electrical Engineering and Automation, Anhui University, Hefei 230601, China

  • Received Date: 20 Jul 2018
  • Rev Recd Date: 10 Aug 2018
    Abstract
  • Based on the similar model test, we studied the peak particle vibration velocity (vp) of the crack-containing anchorage caverns under top explosion using numerical analysis method, and discussed the influence of the crack’s inclination angle and length on vp. The results show a vibration velocity-amplification effect on the crack and cavern surface of the blast side, vp of both sides and bottom of the cavern are much smaller than that of the vault. As the crack length increases, vp of the vault, arch springing and side walls of the anchoring cavern first decrease and then increase and decrease again. The existence of the crack amplifies the arch vp of the anchoring cavern except for the short-length crack condition. As the inclination angle of the crack leans to right, vp of the arch springing and the side walls become asymmetrical, vp of the right arch springing (or right side wall) is greater than that of the left side. The vp of the vault first decreases and then increases as the inclination angle increases, its minimum occurs when the inclination angle is 45°, which is 48.2% lower than that of the non-crack cavity, suggesting that the dynamic response of the structure is effectively weakened.

     

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