3-Dimentional numerical study on dynamic behavior of connection between vertical shaft and tunnel under earthquake loading

Jung-Tae Kim; Gye-Chun Cho; Seok-Jun Kang; Ki Jung Kim; Eun-Soo Hong

doi:10.9711/KTAJ.2018.20.5.887

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2018 Vol.20, Issue 5 Preview Page

3-Dimentional numerical study on dynamic behavior of connection between vertical shaft and tunnel under earthquake loading 3차원 수치해석을 이용한 지진 시 수직구-터널 접속부 동적 거동 분석

30 September 2018. pp. 887-897

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Abstract

3D time history analysis was performed on vertical shaft-tunnel connection to provide insight into the dynamic stress-strain behavior of the connection considering the effects of soil layers, periodic characteristics and wave direction of earthquakes. MIDAS GTS NX based on FEM (Finite Element Method) was used for this study. From this study, it is revealed that the maximum displacement occurred at the upper part of the connection when the long period seismic waves propagate through the tunnel direction in soft ground. Also, stress concentration occurs due to different behaviors of vertical shaft and tunnel, and the stress concentration could be influence for safety on the connection. The results of this study could be useful for the seismic performance design of vertical shaft-tunnel connection.

Keywords

Vertical shaft-tunnel connection

3D Finite element analysis

Time history analysis

Dynamic behavior

수직구와 수평 터널 주위 지층 변화, 지진파 방향성이 접속부의 동적 거동 특성에 미치는 영향을 연구하였다. 유한 요소 기반의 MIDAS GTS NX 프로그램을 이용한 3차원 시간 이력 해석을 통해 검토하였다. 연구결과 연약지반에서 장주기의 지진파가 수평 터널 방향으로 발생하였을 때 접속부 상부에서 최대 변위가 발생하는 것으로 나타났다. 또한 수직구와 수평 터널의 서로 다른 거동 및 지층 경계면의 영향으로 인해 응력집중 현상이 발생하여 문제가 될 수 있음을 확인 할 수 있었다. 연구 결과는 수직구와 수평 터널의 접속부 구조물 내진설계를 위한 기초자료로 활용 될 수 있을 것으로 기대된다.

키워드

수직구-터널 접속부

3차원 유한요소해석

시간이력해석

동적 거동

References

Aguilar-Téllez, M.A., Méndez-Marroquin, R., Rangel-Núñez, J.L., Comulada-Simpson, M., Maidl, U., Auvinet-Guichard, G. (2012), “Mexico City deep eastern drainage tunnel”, Geotechnical Aspects of Underground Construction in Soft Ground, London, Vol. 1, pp. 175-191.

PMC

Jang, D.I., Kim, J.I., Kwak, C.W., Park, I.J. (2017), “Study on flexible segment efficiency for seismic performance improvement of subsea tunnel”, Journal of Korean Tunnelling and Underground Space Association, Vol. 19, No. 3, pp. 503-515. (in Korean)

PMC

Jeon, K., Kim, D., Bang, K., Kim, D, Kim, T. (2009), “A case study of key items on shield TBM tunnel design: istanbul strait road tunnel crossing project”, Proceedings of the KTA International Symposium on Mechanical Tunnelling, Seoul, pp. 1-13. (in Korean)

PMC

Kim, Y.M., Jeong, S.S, Kim, K.Y., Lee, Y.H. (2011), “A study on the dynamic behavior of vertical shaft in multi-layered soil”, Journal of the Korean Society of Civil Engineers, Vol. 31, No. 4C, pp. 109-116. (in Korean)

PMC

Kim, Y.M., Jeong, S.S, Lee, Y.H., Jang, J.B. (2010), “Seismic design of vertical shaft using response displacement method”, Journal of the Korean Society of Civil Engineers, Vol. 30, No. 6C, pp. 241-253. (in Korean)

PMC

Kwak, C.W., Park, I.J. (2015), “Seismic behaviors of twin tunnel with flexible segment”, Journal of Korean Tunnelling and Underground Space Association, Vol. 17, No. 6, pp. 695-702. (in Korean)

PMC

Lee, I.M., Jeong, K.H., Lee, J.S., Choi, J.Y., Shin, Y.J. (2002), “Seismic evaluation of masonry railroad tunnels”, Journal of Korean Tunnelling and Underground Space Association, Vol. 4, No. 4, pp. 319-331. (in Korean)

PMC

Midas Information Technology Co., Ltd. (2017), Midas GTS NX tutorials, Seongnam, Chapter. 13, pp. 5-6.

PMC

Ohbo, N. Hayashi, K., Ueno, K., Kaneko, Y. (1992), “Dynamic behavior of super deep vertical shaft during earthquake”, Proceedings of the 11th World Conference on Earthquake Engineering, Rotterdam, pp. 5031-5036.

PMC

Okamoto, S., Tamura, C., Kato, K., Hamada, M. (1973), “Behaviors of submerged tunnels during earthquakes”, Proceedings of the Fifth World Conference on Earthquake Engineering, Vol. 1, Istanbul, Rome Italy, pp. 544-553.

PMC

Yamamoto, T., Tateishi, A, Tsuchiya, M. (2014), “Seismic design for immersed tube tunnel and its connection with TBM tunnel in Marmaray project”, 2nd European Conference on Earthquake Engineering and Seismology, Istanbul, pp. 1-12.

PMC

Yamazaki, Y., Segawa, N., Koizumi, A. (2013), “Evaluation of earthquake resistance of shield-tunnel/ vertical-shaft connections and countermeasure technology”, NTT Technical Review, Vol. 11, No. 1, pp. 1-6.

PMC

Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 20
No :5
Pages :887-897
Received Date : 2018-07-24
Revised Date : 2018-08-17
Accepted Date : 2018-08-22
DOI :https://doi.org/10.9711/KTAJ.2018.20.5.887

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

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