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

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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A Comparative Study on Seismic Fragility of RC Slab Bridge Considering Aging Effect of Components

RC 슬래브 교량의 요소별 노후도를 고려한 지진취약도 비교분석

  • 안효준 (인하대학교 토목공학과) ;
  • 박기태 (한국건설기술연구원 노후인프라센터) ;
  • 정규산 (한국건설기술연구원 노후인프라센터) ;
  • 김유희 (한국건설기술연구원 노후인프라센터) ;
  • 이종한 (인하대학교 토목공학과)
  • Received : 2021.10.27
  • Accepted : 2021.11.22
  • Published : 2021.12.31
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Abstract

In recent years, large-scale earthquake activity has occurred in Korea, and thus public interest in earthquakes is increasing. Accordingly, the importance of seismic performance management of structures is emerging. In particular, the collapse of a bridge, one of main road facilities, directly leads to many casualties. Therefore, engineers need to evaluate the seismic fragility of the bridge and prepare for the earthquake event. The service life of these bridges has been over 30 years, which requires a study on the aging effect on bridges. In this study, seismic analysis of the target RC slab bridge was performed considering the aging effects of each component of the bridge. Components of the bridge included pier and bearing, which dominate the seismic response of the bridge. The seismic performance of the bridge was evaluated using nonlinear static and dynamic analyses. In addition, the limit state and dynamic response of each component were used to evaluate the seismic fragility according to the aging of each component.

근 국내에서 발생한 대규모 지진으로 인해 국민의 지진에 대한 관심이 증가하고 있다. 이에 따라 구조물의 내진성능관리에 대한 중요성이 대두되고 있다. 특히, 주요 도로시설물인 교량의 붕괴는 많은 인명피해로 직결되기 때문에, 교량의 지진취약도를 사전에 평가하고 대비를 하는 것이 중요하다. 최근에는 공용년수 30년 이상의 교량 구조물이 늘어나고 있어 교량의 노후화 영향에 대한 연구가 필요한 실정이다. 본 연구에서는 교량의 부재별 노후화를 고려하여 대상 RC 슬래브 교량의 지진해석을 실시하였다. 교량의 부재는 지진응답에 지배적인 영향을 주는 교각과 교량받침에 대해서 고려하였다. 교량의 내진성능 응답은 비선형 정적 및 동적 해석을 통해 분석하였다. 또한, 각 부재의 한계상태와 동적응답을 사용하여 부재별 노후화에 따른 지진취약도 비교분석을 수행하였다.

Keywords

Acknowledgement

본 연구는 한국건설기술연구원 주요사업"DNA 기반 노후 교량 구조물 스마트 유지관리 플랫폼및 활용기술개발" 과제(20210289-001)를 통해 수행되었음.

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