A study on failure probability characteristic based on the reliability analysis according to the variation of boundary conditions

Gyu-Phil Lee; Young-Bin Park

doi:10.9711/KTAJ.2023.25.6.447

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2023 Vol.25, Issue 6 Preview Page Next Page

Research Paper

A study on failure probability characteristic based on the reliability analysis according to the variation of boundary conditions 신뢰성 기반 쉴드터널의 경계조건 변화에 따른 파괴확률 특성에 관한 연구

30 November 2023. pp. 447-458

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Abstract

In this study, a comparison model considering the stochastic characteristics of the load and member resistance of the shield tunnel segment lining as well as the variability of the boundary condition was selected and reliability analysis was performed, and the adequacy of the limit state design was analyzed by calculating the probability of failure and reviewing the structural safety. For the analysis considering the probability characteristics of these ground constants, the ground spring coefficient was considered as the mean value by calculating the quantitative value by applying the Muirwood formula, and the coefficient of variation was selected based on the existing research data to review the models according to the change of ground boundary conditions. Through the structural analysis of these models and the reliability analysis using MCS technique, the failure probability and reliability index were calculated to examine the changes in the failure probability due to changes in ground boundary conditions.

Keywords

Segment lining

Limit state design

Soil material probability

Boundary condition

Coefficient of variation

본 연구에서는 쉴드터널 세그먼트 라이닝의 하중과 부재저항의 확률적 특성뿐만 아니라 경계조건의 변동성을 고려한 비교모델을 선정하고 신뢰성해석을 수행하였으며, 파괴확률 산정 및 구조안전성 검토를 통해 한계상태설계의 적정성에 대해 분석을 수행하였다. 이러한 지반 정수의 확률특성치를 고려한 해석을 위해 지반스프링계수는 Muirwood식을 적용하여 정량적 값을 산정하여 Mean값으로 고려하였고, 변동계수는 기존 연구자료를 토대로 지반 경계조건 변화에 따른 검토대상 모델들을 선정하였다. 이러한 모델들에 대한 구조해석과 MCS기법을 적용한 신뢰성분석을 통해 파괴확률과 신뢰성지수를 산정하여 지반경계조건 변화에 따른 파괴확률의 변화를 검토하였다.

키워드

세그먼트 라이닝

한계상태설계

확률특성치

경계조건

변동계수

References

Byun, Y., Kim, D., Lee, S. (2019), "Determination of the coefficient of variation of parameters for the reliability design of shield tunnel segment lining", Journal of Korean Tunnelling and Underground Space Association, Vol. 21, No. 6, pp. 875-885. 10.9711/KTAJ.2019.21.6.875

Kim, J.S., Kim, J.H. (2011), "Development of statistical models for resistance of reinforced concrete members", KSCE Journal of Civil and Environmental Engineering Research, Vol. 31, No. 4A, pp. 323-329. 10.12652/Ksce.2011.31.4A.323

Kim, K.S., Kim, J.H., Choi, S.O. (2020), "Development and field application of apparatus for determination of limit state design strength characteristics in weathered ground", Tunnel and Underground Space, Vol. 32, No. 2, pp. 164-179. 10.7474/TUS.2020.30.2.164

MOLIT (2014), Research on modifying design criteria of structure foundation for standardization, Ministry of Land, Infrastructure and Transport, Sejong, pp. 329-333.

Nowak, A.S., Collins, K.R. (2013), Reliability of Structures, CRC Press, London, pp. 278-292. 10.1201/b12913

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 :6
Pages :447-458
Received Date : 2023-10-06
Revised Date : 2023-10-30
Accepted Date : 2023-10-30
DOI :https://doi.org/10.9711/KTAJ.2023.25.6.447

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

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