Study on Seismic Evaluation of Racking Response of Underground Utility Tunnels with a Rectangular Cross Section in Korea

Dae-Hwan Kim; Youngwoo Lim; Yon Ha Chung; Hyerin Lee

doi:10.7843/kgs.2022.38.12.29

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2022 Vol.38, Issue 12 Preview Page Next Page

Study on Seismic Evaluation of Racking Response of Underground Utility Tunnels with a Rectangular Cross Section in Korea 국내 박스형 공동구의 횡방향 지진 변위응답 평가에 대한 고찰

31 December 2022. pp. 29-43

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Abstract

Various underground facilities are being constructed to improve the urban environment. Therefore, it is more necessary than ever to reasonably evaluate the seismic response of underground utility tunnels, playing a significant part in urban infrastructure. In this study, the major features and differences of two types of existing pseudo-static analysis methods are reviewed. Each method uses a simplified 2D frame model to represent the seismic behavior of underground structures. Applying each method to a one-barrel rectangular utility tunnel in Korea, the suitability in predicting seismic responses, especially the racking deformation of the tunnel, is examined. In addition, several precautions and suggestions are provided in this study against the inattentive application of the methods to seismic evaluation of underground structures.

Keywords

Racking deformation

Response displacement methods

Seismic evaluation

Simplified analysis model

Soil-tunnel interaction

다양한 시설의 지하화가 진행되고 있는 현 상황에서 지중구조물 중 도시 기반시설 기능의 상당 부분을 담당하고 있는 지하공동구의 지진 응답에 대한 합리적 평가 필요성이 높아지고 있다. 본 연구에서는 기존에 제안된 국내외 지중구조물 내진평가방법 중 단순화 2차원 프레임 해석모델을 사용한 의사정적 방법의 주요 내용과 차이점을 살펴보고 국내에 시공된 1련 박스형 단면의 지하공동구에 적용하여 지진거동, 특히 횡방향 뒤틀림 변형에 대한 예측 적합성을 검토한다. 이에 덧붙여, 이러한 방법을 적용하여 지중구조물의 지진응답 평가 시 유의할 점을 논의한다.

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Information

Publisher :The Korean Geotechnical Society
Publisher(Ko) :한국지반공학회
Journal Title :Journal of the Korean Geotechnical Society
Journal Title(Ko) :한국지반공학회 논문집
Volume : 38
No :12
Pages :29-43
Received Date : 2022-10-28
Revised Date : 2022-12-14
Accepted Date : 2022-12-15
DOI :https://doi.org/10.7843/kgs.2022.38.12.29

Journal of the Korean Geotechnical Society ISSN:1229-2427(Print) 2288-646X(Online) 한국지반공학회 논문집

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