Evaluation of pre-developed seismic fragility models of bored tunnels

Seunghoon Yang; Dongyoup Kwak

doi:10.9711/KTAJ.2023.25.3.187

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2023 Vol.25, Issue 3 Next Page

Research Paper

Evaluation of pre-developed seismic fragility models of bored tunnels 기 개발된 굴착식 터널의 지진취약도 모델 적용성 평가

31 May 2023. pp. 187-200

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Abstract

This study analyzed the seismic fragility of bored tunnels based on their surrounding conditions and suggested a representative seismic fragility model. By analyzing the existed seismic fragility models developed for bored tunnels, we developed weighted combination models for each surrounding conditions, such as ground conditions and depth of the tunnel. The seismic fragility curves use the peak ground acceleration (PGA) as a parameter. When the PGA was 0.3 g, the probability of damage exceeding minor or slight damage was 20% for depth of 50 m or less, 10% for depth between 50 m and 100 m, and 3% for depth of 100 m or more. It was also found that the probability of damage was higher for the same PGA and depth when the surrounding ground was rock rather than soil. The probability of damage decreases as the depth increase. This study is expected to be used for developing a comprehensive seismic fragility function for tunnels in the future.

Keywords

Seismic fragility model

Bored tunnel

Weighted combination

PGA

Probability of damage

본 연구에서는 주변 환경에 따른 굴착식 터널의 지진취약도 변화에 대한 분석을 진행하고 대표 지진취약도 모델을 제시하였다. 기 개발된 굴착식 터널의 지진취약도 모델들에 대한 분석을 진행한 후 각 모델들에 가중치를 부여하여 주변 환경에 맞게 새로 가중조합한 모델을 개발하였다. 주변 환경은 굴착식 터널 주변의 지반조건과 매설 깊이를 고려하였다. 지진취약도 곡선의 피해 발생 확률은 최대지반가속도(PGA)를 매개변수로 하여 결정된다. PGA가 0.3 g일 때 매설 깊이가 50 m이하의 조건에서는 경미한 손상을 초과하는 피해 확률이 20%, 매설 깊이가 50 m 이상 100 m 이하의 조건에서는 피해 확률이 10%, 매설 깊이 100 m 이상의 조건에서는 피해 확률이 3% 이하로 매설 깊이에 따라 피해 확률이 점차 낮아지는 것을 확인하였다. 또한 주변 지반이 토양으로 되어있을 때보다 암반으로 되어있을 때 동일한 지표의 PGA에 대해 같은 매설 깊이에서 피해 확률이 크게 나타나며, 매설 깊이가 깊어질수록 피해 확률이 작아진다. 이 연구는 향후 터널의 종합적 지진취약도 함수 개발에 유용하게 사용될 것으로 기대된다.

키워드

지진취약도 모델

굴착식 터널

가중조합

최대지반가속도

피해 확률

References

ALA (American Lifelines Alliance) (2001), Seismic fragility formulations for water systems: Part 1 - Guideline, ASCE-FEMA, Reston, VA2001, pp. 85-89.

Andreotti, G., Lai, C.G. (2019), "Use of fragility curves to assess the seismic vulnerability in the risk analysis of mountain tunnels", Tunnelling and Underground Space Technology, Vol. 91, 103008. 10.1016/j.tust.2019.103008

Chen, Z., Shi, C., Li, T., Yuan, Y. (2012), "Damage characteristics and influence factors of mountain tunnels under strong earthquakes", Natural Hazards, Vol. 61, pp. 387-401. 10.1007/s11069-011-9924-3

Cornell, C.A., Shome, N. (1999), Probabilistic seismic demand analysis of nonlinear structures, Report No. RMS-35, RMS Program, pp. 232-239.

FEMA (2004), HAZUS-MH technical manual, Federal Emergency Management Agency, pp. 7-1-24.

Gao, F., Sun, C.X., Tan, X.K., Zhu, Y., Li, H. (2015), "Shaking table tests for seismic response of tunnels with different depths", Rock and Soil Mechanics, Vol. 36, No. 9, pp. 2517-2522. 10.16285/j.rsm.2015.09.011

Ghosh, S., Ghosh, S., Chakraborty, S. (2021), "Seismic fragility analysis in the probabilistic performance-based earthquake engineering framework: an overview", International Journal of Advances in Engineering Sciences and Applied Mathematics, Vol. 13, pp. 122-135. 10.1007/s12572-017-0200-y

Hu, X., Zhou, Z., Chen, H., Ren, Y. (2020), "Seismic fragility analysis of tunnels with different buried depths in a soft soil", Sustainability, Vol. 12, No. 3, 892. 10.3390/su12030892

Huang, Z.K., Pitilakis, K., Tsinidis, G., Argyroudis, S., Zhang, D.M. (2020), "Seismic vulnerability of circular tunnels in soft soil deposits: The case of Shanghai metropolitan system", Tunnelling and Underground Space Technology, Vol. 98, 103341. 10.1016/j.tust.2020.103341

Jaramillo, C.A. (2017), "Impact of seismic design on tunnels in rock-case histories", Underground Space, Vol. 2, No. 2, pp. 106-114. 10.1016/j.undsp.2017.03.004

Kamemura, K. (2019), "Seismic response and stability of rock tunnels-Its history and problems today", Proceedings of the ISRM Rock Dynamics Summit, Okinawa, Japan, pp. 52-62. 10.1201/9780429327933-7

KMA (2017), Seismological annual report 2016, No. 11-1360000-0000104-10, Korea Meteorological Administration.

Kwak, D.Y., Seyhan, E., Kishida, T. (2018), "A method of linear combination of multiple models for epistemic uncertainty minimization", Proceedings of the Eleventh US National Conference on Earthquake Engineering, Los Angeles, California, pp. 1-10.

MOLIT (2022), Yearbook of road bridge and tunnel statistics, No. 11-1613000-000108-10, Ministry of Land, Infrastructure and Transport.

Oh, J., Moon, T. (2018), "Seismic design of a single bored tunnel: longitudinal deformations and seismic joints", Rock Mechanics and Rock Engineering, Vol. 51, No. 3, pp. 893-910. 10.1007/s00603-017-1366-0

Park, D., Nguyen, D.D., Lee, T.H., Nguyen, V.Q. (2018), "Seismic fragility evaluation of cut-and-cover tunnel", Journal of the Korean Geotechnical Society, Vol. 34, No. 11, pp. 71-80. 10.7843/kgs.2018.34.11.71

Roy, N., Sarkar, R. (2017), "A review of seismic damage of mountain tunnels and probable failure mechanisms", Geotechnical and Geological Engineering, Vol. 35, pp. 1-28. 10.1007/s10706-016-0091-x

Sharma, S., Judd, W.R. (1991), "Underground opening damage from earthquakes", Engineering Geology, Vol. 30, No. 3-4, pp. 263-276. 10.1016/0013-7952(91)90063-Q

Straub, D., Der Kiureghian, A. (2008), "Improved seismic fragility modeling from empirical data", Structural Safety, Vol. 30, No. 4, pp. 320-336. 10.1016/j.strusafe.2007.05.004

Yang, S., Kwak, D. (2022), "Evaluation of seismic fragility models for cut-and-cover railway tunnels", Journal of Korean Tunnelling and Underground Space Association, Vol. 24, No. 1, pp. 1-13.

Zhong, Z., Shen, Y., Zhao, M., Li, L., Du, X., Hao, H. (2020), "Seismic fragility assessment of the Daikai subway station in layered soil", Soil Dynamics and Earthquake Engineering, Vol. 132, 106044. 10.1016/j.soildyn.2020.106044

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 : 25
No :3
Pages :187-200
Received Date : 2023-03-07
Revised Date : 2023-05-24
Accepted Date : 2023-05-24
DOI :https://doi.org/10.9711/KTAJ.2023.25.3.187

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

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