Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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A proposal of simple evaluation on the seismic performance of tunnel lining

터널 라이닝의 내진성능 간편 평가법 제안

  • Ahn, Jae-Kwang (Earthquake and Volcano Research Division, Korea Meteorological Administration) ;
  • Byun, Yoseph (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Gyuphil (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Seongwon (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
  • 안재광 (기상청 지진화산센터) ;
  • 변요셉 (한국건설기술연구원 지반연구소) ;
  • 이규필 (한국건설기술연구원 지반연구소) ;
  • 이성원 (한국건설기술연구원 지반연구소)
  • Received : 2018.01.25
  • Accepted : 2018.02.26
  • Published : 2018.03.31
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Abstract

The country has built and is operating IT-based integrated management system for efficient management of national highway tunnels used publicly these days. Since this system doesn't include the management function on earthquakes, it is impossible to promptly respond to earthquakes and to select the sections requiring seismic reinforcement. Tunnels designed and constructed after 1999 have been subjected to seismic design for an earthquake with a return period 1000 years. Therefore, it is necessary to evaluate the stability of structures in case of earthquakes more than this. Since it takes a lot of time to perform the stability evaluation on various earthquake magnitudes, a method that can easily evaluate earthquakes is needed. In this paper, the empirical simplification method that can easily evaluate the earthquake was proposed. For this, the study calculated ground displacement by conducting one-dimensional ground response analysis, and examined the safety of tunnels in the event of occurrence of an earthquake using two means of response displacement method (analytics and numerical analysis).

최근 국내에서 공용중인 국도터널의 효율적 관리를 위해 IT 기반의 터널 통합관리 시스템을 구축하여 운용 중에 있다. 이 시스템은 지진에 대한 관리 기능이 포함되어 있지 않기 때문에 지진에 대한 신속한 대응과 내진 보강 대상 구간을 선별하는 것이 불가능하다. 특히, 1999년 이후부터 설계 및 시공된 터널은 재현주기 1000년(붕괴방지수준)을 기준으로 내진설계가 되어 있기에 이 이상의 지진이 발생할 경우 구조물에 대한 안정성은 별도의 평가가 필요한 실정이다. 그러나 다양한 지진규모에 대해 안정성 평가를 수행하려면 물리적으로 많은 시간이 소요되므로 보다 간편하게 평가할 수 있는 방법이 필요하다. 따라서 본 논문에서는 지진에 대한 평가를 간편하게 수행할 수 있는 경험적 간편식을 제안하고자 하였다. 이를 위해 1차원 지반응답해석을 수행하여 지반 변위를 계산하였고, 응답변위법의 2가지 방법(해석해와 수치해석)을 사용하여 지진 시 터널의 안정성을 검토하였다.

Keywords

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