›› 2010, Vol. 31 ›› Issue (6): 1884-1890.

• Geotechnical Engineering • Previous Articles     Next Articles

Establishment of tunnel damping model and research on damping effect with model test in highly seismic area

WANG Ming-nian，CUI Guang-yao   

  1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
  • Received:2009-07-21 Online:2010-06-10 Published:2010-06-25

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Abstract:

Field investigation showed that: 21 expressways and 16 national and provincial roads were damaged during 5.12 Wenchuan earthquake. 24 tunnels (20 417 running meters) were damaged in this earthquake. It had seriously affected the disaster relief and post-disaster reconstruction. The traditional aseismic technology can not guarantee the safety of the tunnel structure. Therefore, by analyzing the earthquake disaster character and reason of tunnel, a damping model of setting shock absorption layer in the supporting system of tunnel is established. According to this damping model, shock absorption layer stiffness, the input of frequency of seismic and shock absorption layer damping on damping effect of tunnel are researched. Through three-dimensional numerical simulation and indoor model test, damping effect of this damping model is proved. Research results provide references for aseismic design of tunnel structure in a highly seismic area.

Key words: highly seismic area, damping model of tunnel, damping model test

CLC Number: 

  • U 451
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