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Seismic behaviors of twin tunnel with flexible segment
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 Title & Authors
Seismic behaviors of twin tunnel with flexible segment
Kwak, Chang-Won; Park, Inn-Joon;
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Recently, the improvement of mechanical and theoretical issues in geo-centrifuge test enhances the applicability and accuracy of the test. Geo-centrifuge test is appropriate to simulate the behaviors of underground structures like tunnel, since tunnel interacts with the soil and/or rock around it and the test can embody the in-situ stress conditions effectively. In this study, the seismic behaviors of twin tunnel were analyzed based on geo-centrifuge test. Flexible segment to mitigate seismic acceleration were implemented in the model with thin and thick thickness. Based on the test results, it was found that flexible segment can decrease the peak acceleration generally, however, thin flexible segment was not able to reduce peak acceleration in short-period seismic wave. Thick flexible segment was more effective in case of high bedrock acceleration condition. Additionally, 3-dimensional numerical analysis was performed to verify the characteristics of seismic behavior and the effect of flexible segment. Consequently, the numerical analysis result showed good agreement with the test result.
Geo-centrifuge;Twin tunnel;Flexible segment;Numerical analysis;
 Cited by
Baziar, M.H., Moghadam, M.R., Kim, D.S., Choo, Y.W. (2014), "Effect of underground tunnel on the ground surface acceleration", Tunnelling and Underground Space Technology, Vol. 44, pp. 10-22. crossref(new window)

Chen, Z.Y., Shen, H. (2014), "Dynamic centrifuge tests on isolation mechanism of tunnels subjected to seismic shaking", Tunnelling and Underground Space Technology, Vol. 42, pp. 67-77. crossref(new window)

Cilingir, U., Madabhushi, S.P.G. (2009), "A model study on the effects of input motion on the seismic behaviour of tunnels", Soil Dynamics and Earthquake Engineering, Vol. 31, pp. 452-462.

Cilingir, U., Madabhushi, S.P.G. (2009), "Effect of depth on seismic response of circular tunnels", Canadian Geotechnical Journal, Vol. 48, pp. 117-127.

Lanzano, G. (2009), "Physical and analytical modeling of tunnels under dynamic loadings. Ph. D. Dissertation, University of Naples 'FedericoII' Naples.

Pitilakis, K., Tsinidis, G., Leanza, A., Maugeri, M. (2014), "Seismic behaviour of circular tunnels accounting for above ground structures interaction effects", Soil Dynamics and Earthquake Engineering Vol. 67, pp. 1-15. crossref(new window)

Yang, W., Hussein, M.F.M., Marshall, A.M. (2013), "Centrifuge and numerical modelling of ground-borne vibration from an underground tunnel", Soil Dynamics and Earthquake Engineering Vol. 51, pp. 23-34. crossref(new window)