JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2017, Vol. 47 ›› Issue (2): 14-19.doi: 10.6040/j.issn.1672-3961.0.2017.027

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Effect of the velocity pulse on the seismic response of the tunnel

BAI Xianjun1, WANG Taixing1, WEI Xin1, ZHAO Wusheng2   

  1. 1. No.3 Engineering Co., Ltd., China Gezhouba Group, Xi'an 710000, Shaanxi, China;
    2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, Hubei, China
  • Received:2017-01-16 Online:2017-04-20 Published:2017-01-16

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Abstract: Based on the statistical characteristics of the velocity pulse near the fault and the phase difference, a synthetic method of pulse-like ground motion was proposed. This method could ensure that the synthetic record was non-stationary both in time domain and frequency domain. Based on the N-J hydropower station in Pakistan, the effect of the velocity pulse on the seismic responses of the tunnel were studied by numerical simulation. The results showed that the seismic response of the tunnel was significantly influenced by the velocity pulse. When considering the velocity pulse, the internal forces in tunnel liner increased remarkably, and the damage to the tunnel liner became more serious. The velocity pulse should be considered in anti-seismic design for the tunnels near the faults.

Key words: velocity pulse, tunnel, seismic response, fault

CLC Number: 

  • TU43
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