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2025 Vol.41, Issue 6 Preview Page
Dynamic Behavior Analysis of Underground Railway Box Structures Considering Korean Ground Conditions

국내 지반조건을 반영한 철도 지하 박스 구조물의 동적 거동 분석

YuSeong Lee1†
,
Seokjung Kim2†
,
Mintaek Yoo3*
이 유성1†
,
김 석중2†
,
유 민택3*
1Member, Graduate Student, Dept. of Civil and Enviornmental Engineering, Gachon Univ.
2Member, Senior Researcher, Dept. of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology
3Member, Assistant Prof., Dept. of Civil and Enviornmental Engineering, Gachon Univ.
1정회원, 가천대학교 토목환경공학과 석사과정
2정회원, 한국건설기술연구원 지반연구본부 수석연구원
3정회원, 가천대학교 토목환경공학과 조교수
*Corresponding Author
†이유성, 김석중은 공동 제1저자로서 본 연구에 동등하게 기여하였음.
31 December 2025. pp. 67-76
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Abstract

This study developed a two-dimensional (2D) finite element model to evaluate the seismic performance of underground railway box structures under representative Korean ground conditions. The proposed model was validated by comparing its dynamic response with results obtained from the one-dimensional (1D) site response analysis program DEEPSOIL. The structural geometry and specifications were based on a cut-and-cover station concourse in Korea. Using this model, the dynamic behavior of the structure was analyzed under varying input ground motion characteristics, tunnel embedment depths, and ground shear wave velocities. The results show that the frequency content of the input ground motion and ground stiffness strongly influence the structural response. Bending moments acting on the sidewalls and top slab increased as ground stiffness decreased and tunnel embedment depth increased.

Keywords
Finite element model
Ground motion
Korean ground conditions
Underground railway box structure

본 연구는 지진 발생 시 한국의 지반 조건에 맞는 지하 철도 지하 박스 구조물의 내진 성능을 평가하기 위한 2차원 유한요소 모델을 개발하였다. 제안된 모델은 1차원 부지응답 해석 프로그램인 DEEPSOIL을 활용하여 비선형 지반의 동적 응답을 비교 및 검증하였으며, 지하 박스 구조물의 형상 및 제원은 실제 한국의 개착식 대합실의 시설 계획을 기반으로 설정하였다. 본 모델을 통하여 입력 지진파의 특성, 지하 박스 구조물의 근입 깊이, 지반의 전단파 속도 등 다양한 변수에 따른 동적 거동 특성을 분석하였다. 그 결과, 입력 지진파의 주파수 성분과 지반의 강성에 따라 구조물의 동적 응답 특성이 상이하게 나타났으며, 지반의 강성이 낮고 지하 박스 구조물의 근입 깊이가 깊어질수록 측벽 및 상부 슬래브에 작용하는 휨 모멘트가 증가하는 경향을 보였다.

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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 : 41
  • No :6
  • Pages :67-76
  • Received Date : 2025-10-16
  • Revised Date : 2025-11-13
  • Accepted Date : 2025-11-14
  • DOI :https://doi.org/10.7843/kgs.2025.41.6.67
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