Studies on Dynamic Response of Subway Tunnels with Initial Defect under Long-Term Train Loads

Abstract:

Article Preview

Based on the background of a subway construction project, deterioration characteristics of the existed subway tunnels under long-term train loads is studied by using the method of stiffness discount which could reflect fatigue damage of the structure. Firstly, dynamic response of the tunnel with initial defects caused by approaching construction under long-term train loads is analyzed according numerical simulation, and some results under different degrees of fatigue are obtained. Then, numerical results of acceleration responses at such different points as the upper vault, the side wall and the bottom of tunnels in two directions, are compared with each other while the train loads are applied at the left tunnel, especially under three different stiffness. Our investigation shows local structural damage in the position with initial cracks will be caused by a high cycle stress although there are fewer influences of stiffness changes on dynamic response of tunnels.

Info:

Periodical:

Edited by:

Chunliang Zhang and Paul P. Lin

Pages:

1005-1009

Citation:

F. Dong et al., "Studies on Dynamic Response of Subway Tunnels with Initial Defect under Long-Term Train Loads", Applied Mechanics and Materials, Vols. 226-228, pp. 1005-1009, 2012

Online since:

November 2012

Export:

Price:

$38.00

[1] S.Y. Wang, L.X. Zhang, R.P. XU and Z.D. Zhao: Mechanics and Practices, (2003) No. 5, p.55. (In Chinese).

[2] J.P. OU and Y.Q. Lin: China Civil Engineering Journal, Vol. 32 (1999) No. 5, p.15. (In Chinese).

[3] L. Li, B.Q. Zhang and X.L. Yang: Chinese Journal of Rock Mechanics and Engineering, Vol. 23 (2005) No. 24, p.4260. (In Chinese).

[4] S.J. Li and M.L. Lou: Journal of Tongji University (Natural Science Edition), Vol. 11 (2008) No. 36, p.1498. (In Chinese).

[5] G.X. Chen, X.M. Su and B. Chen: Journal of Disaster Prevention and Mitigation Engineer, Vol. 1 (2008) No. 28, p.71. (In Chinese).