A study on the coefficients of variation of seismic load effect for the limit state design of shield tunnel based on the reliability analysis

Young-Bin Park; Do Kim; Yosep Byun; Gyu-Phil Lee

doi:10.9711/KTAJ.2020.22.3.311

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2020 Vol.22, Issue 3 Preview Page Next Page

Research Paper

A study on the coefficients of variation of seismic load effect for the limit state design of shield tunnel based on the reliability analysis 신뢰성 기반 쉴드 터널의 한계상태설계를 위한 지진하중 효과의 변동계수에 관한 연구

31 May 2020. pp. 311-321

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Abstract

In this study, coefficient of variation for the seismic load effect on the segment lining was calculated. The statistical characteristics of the soil property were analyzed for the probability characteristics of domestic soil. In order to calculate the coefficient of variation for the seismic load effect, the MCS technique was applied, and the closed-form equation was applied to calculate the seismic load effect. As a result of calculating the coefficient of variation, the coefficient of variation of the seismic load effect on the weathered soil was analyzed in the range of 0.06~0.15, and the coefficient of variation was judged to be used as basic data for designing the limit state of the shield tunnel on seismic condition.

Keywords

Shield tunnel

Segment lining

Limit state design

Seismic load effect

Coefficient of variation

본 연구에서는 쉴드 터널 세그먼트 라이닝의 한계상태설계 시 세그먼트 라이닝에 작용하는 지진하중에 대한 변동계수를 산정하였다. 지반 정수의 통계적 특성치는 국내 지반의 확률특성치를 분석하여 단위중량에 대한 통계적 특성치를 산정하였으며, 전단탄성파 속도를 산정하기 위해 N값과 확률 특성치를 이용하였다. 지진하중 효과에 대한 변동계수를 산정하기 위하여 MCS기법을 적용하였으며, 지진하중 효과 산정에는 closed-form식을 적용하였다. 변동계수 산정결과, 풍화토 지반에서 지진하중 효과의 변동계수는 0.06~0.15의 범위로 분석되었고, 변동계수는 지진을 고려한 쉴드 터널의 한계상태설계 시 기본자료로 활용할 수 있을 것으로 판단된다.

키워드

쉴드 터널

세그먼트 라이닝

한계상태설계법

지진하중

변동계수

References

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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 : 22
No :3
Pages :311-321
Received Date : 2020-04-02
Revised Date : 2020-04-28
Accepted Date : 2020-05-12
DOI :https://doi.org/10.9711/KTAJ.2020.22.3.311

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

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