shock responses of metro subjected to explosive loads

Kong De-sen;;Meng Qing-hui;Zhang Wei-wei;Zhang Qiu-hua

Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (12) : 68-72.

PDF(2441 KB)
PDF(2441 KB)
Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (12) : 68-72.
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shock responses of metro subjected to explosive loads

  • Kong De-sen1, 2, Meng Qing-hui1, Zhang Wei-wei1, Zhang Qiu-hua1
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Abstract

With the large-scale construction of metro, the research on the anti-explosion protection of metro tunnel becomes an urgent problem. Aimed at the practical engineering geological conditions of the running tunnel in Nanjing metro, a calculation model for the shock responses of the metro tunnel was established, and comprehensive study on the shock response of the metro tunnel under the action of 10kg TNT was conducted with fluid-structure coupling computation. The research results indicate that velocity and acceleration variations of the liner are related with overpressure and with the increase of the distance from blasting center, the influence of the explosive shock waves on the liner structure decreases. Moreover, at the initial time of the explosion, the liner of the metro is in tensile state, and with time lapses, the peak value of the overpressure decreases gradually, then the tunnel liner changes to be compressed and tends to be stable finally. This provides references for the anti-explosion protection of metro tunnel and the formulation of the emergency plan.

Key words

explosive load / metro tunnel / shock response / time-history curve

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Kong De-sen;;Meng Qing-hui;Zhang Wei-wei;Zhang Qiu-hua . shock responses of metro subjected to explosive loads[J]. Journal of Vibration and Shock, 2012, 31(12): 68-72
PDF(2441 KB)

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