Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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A Study on Seismic Performance Evaluation of Road Tunnel according to Seismic Analysis Conditions

내진해석 조건에 따른 도로터널 내진성능평가에 관한 연구

  • 최병일 (국토안전관리원 기반시설본부 시설안전관리단 터널실) ;
  • 김찬희 (국토안전관리원 기반시설본부 시설안전관리단 터널실) ;
  • 노은철 (국토안전관리원 기반시설본부 시설안전관리단 터널실) ;
  • 하명호 (국토안전관리원 기반시설본부 시설안전관리단 터널실) ;
  • 박시현 (국토안전관리원 재난안전본부 재난안전관리실)
  • Received : 2021.08.27
  • Accepted : 2021.09.24
  • Published : 2021.10.30
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Abstract

When constructing a tunnel on a stable ground, stress is changed in the ground during excavation stage and installation of ground support materials. In the standards for safety evaluation of structures in use, it is suggested to perform numerical analysis reflecting the excavation stage. But method of seismic performance evaluation was not presented. Therefore, in this study, numerical analysis was performed with different analysis methods, and the results were compared and analyzed. As a result of the numerical analysis, seismic wave applied in the horizontal direction were no difference depending on the analysis methods. However, there was a big difference in the result according to the evaluation methods of tunnel member forces. When reviewing with the strength design method, the structure performance could be not satisfied depending on the existence or nonexistence of reinforcing bars. Based on these research results, it is suggested that the interpretation method should be clearly presented and reflected in the relevant standards.

안정된 지반에 터널건설시 단계별 굴착, 지보재 설치 과정 등에서 지반에 응력변화가 발생하게 된다. 공용중인 구조물의 안전성평가를 위해 시설물의 안전 및 유지관리 실시 세부지침(2019)에서는 굴착단계를 반영한 수치해석을 수행하도록 제시되어 있다. 그러나 내진성능평가의 경우 명확한 방법이 제시되지 않았다. 따라서 본 연구에서는 해석방법을 달리하여 수치해석을 수행하고 결과 값을 비교·분석 하였다. 수치해석 결과, 수평방향으로 작용한 지진파에 따른 변위 값은 해석방법에 따른 차이점을 찾을 수 없었다. 하지만 굴착터널의 안전성평가 항목인 부재력 평가결과 평가 방법에 따라 결과 값이 큰 차이가 나타났으며, 강도설계법으로 검토시 철근 유·무에 따라 구조물이 안전성을 만족하지 못하는 형태로 검토 될 수 있는 것을 확인할 수 있었다. 이런 연구결과를 토대로 해석방법을 명확히 제시하고 관련 기준에 반영하는 것을 제안한다.

Keywords

Acknowledgement

본 연구는 '2021년 중부내륙지선 달성1터널 정밀안전진단 및 성능평가' 용역의 지원으로 작성하였습니다.

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