NUMERICAL SIMULATION OF SEISMIC RESPONSE AT THE ENTRANCE OF THE UNSYMMETRICAL LOADING TUNNEL

XIONG Liang-xiao; LI Tian-bin; LIU Yong

Volume 13 Issue 3

Sep. 2007

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Article Navigation > Journal of Geomechanics > 2007 > 13(3): 255-260

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XIONG Liang-xiao, LI Tian-bin, LIU Yong, 2007. NUMERICAL SIMULATION OF SEISMIC RESPONSE AT THE ENTRANCE OF THE UNSYMMETRICAL LOADING TUNNEL. Journal of Geomechanics, 13 (3): 255-260.

Citation:

XIONG Liang-xiao, LI Tian-bin, LIU Yong, 2007. NUMERICAL SIMULATION OF SEISMIC RESPONSE AT THE ENTRANCE OF THE UNSYMMETRICAL LOADING TUNNEL. Journal of Geomechanics, 13 (3): 255-260.

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NUMERICAL SIMULATION OF SEISMIC RESPONSE AT THE ENTRANCE OF THE UNSYMMETRICAL LOADING TUNNEL

1.
Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
2.
College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
3.
Sichuan Expressway Construction & Development Corporation, Chengdu 610041, S ichuan, China

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Abstract

Abstract

In the mathematic modeling of the seismic response of a tunnel, the lateral calculation range and artificial boundary have great influence on the result of calculation.With the Huangcaoping tunnel as the study objective, its seismic response is simulated using the finite difference procedure FLAC^3D.The 5, 6, 7, 8, 9 and 10 times the diameter of the entrance of the tunnel are taken as the lateral calculation range respectively, and the cutting boundary, free-field boundary and viscous boundary in FLAC^3D are used for the calculation.The results of the study indicate that it is relatively reasonable to take 7 ~ 8 times the diameter of the entrance of the tunnel as the lateral calculaiton range and the free field boundary or viscous boundary as the artificial boundary when the seismic waves are P-waves.
- tunnel,
- seismic response,
- FLAC^3D,
- lateral calculation range,
- artificial boundary

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References

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