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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.17 No.6

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Seismic behaviors of twin tunnel with flexible segment

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2015, v.17 no.6, pp.695-702


& (2015). Seismic behaviors of twin tunnel with flexible segment. (사)한국터널지하공간학회, 17(6), 695-702.

Abstract

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.

keywords
Geo-centrifuge, Twin tunnel, Flexible segment, Numerical analysis, 원심모형시험, 병렬터널, Flexible segment, 수치해석

Reference

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