Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Evaluation on the Structural Performance and Economics of Ultra-high Performance Concrete Precast Bridges Considering the Construction Environment in North Korea

북한 건설환경을 고려한 초고성능 콘크리트 프리캐스트 교량의 구조성능 및 경제성 평가

  • 김경철 (한국건설기술연구원 남북한인프라특별위원회 특화기술연구팀) ;
  • 고경택 (한국건설기술연구원 남북한인프라특별위원회) ;
  • 손민수 (한국건설기술연구원 남북한인프라특별위원회 특화기술연구팀) ;
  • 류금성 (한국건설기술연구원 인프라안전연구본부 복합신소재연구센터) ;
  • 강재윤 (한국건설기술연구원 인프라안전연구본부 차세대 인프라연구센터)
  • Received : 2021.05.13
  • Accepted : 2021.06.01
  • Published : 2021.06.30
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Abstract

In this study, a customiz ed bridge system was developed for North Korea application. For the application of North Korea, the customized bridge system design, fabrication, and construction performance evaluation were performed using ultra-high performance concrete a compressive strength 120MPa or more and a direct tensile strength 7MPa or more. The comparison of the North Korean truck luggage load(30, 40, 55) and the Korean standard KL-510 load showed that cross-section increased as the load increased. Furthermore, a bridge with a span length of 30m was fabricated with ultra-high performance concrete for the construction performance evaluation. The evaluation of the load condition analysis was performed by a flexural test. The results showed that a bridge with a span length of 30m secured about 167% of sectional performance under initial cracking load conditions and about 134% of load bearing capacity under ultimate load conditions. As a result of economic analysis, the customized bridge system using ultra-high-performance concrete was less than about 11% of the upper construction cost compared to the steel composite girder bridge. Therefore, these results suggest that the price competitiveness can be secured when applying the ultra-high-performance concrete long-span bridge developed through this study.

본 연구에서는 북한 건설환경을 고려한 초고성능 콘크리트 프리캐스트 교량 시스템을 개발하고자 한다. 맞춤형 교량 시스템은 최근에 개발된 압축강도 120MPa 이상, 직접인장강도 7MPa 이상을 갖는 초고성능 콘크리트를 적용하여 설계, 제작 및 구조성능평가를 통하여 북한의 적용 가능성을 분석하였다. 설계를 위해 북한의 자동차짐(30, 40, 55)을 남한의 KL-510 하중과 비교한 결과, 하중이 증가함에 따라 단면이 증가하는 것으로 나타났다. 또한, 구조성능평가를 위하여 지간장 30m 교량 실험체를 초고성능 콘크리트를 이용하여 제작하였다. 휨 실험을 통하여 하중 분석을 수행한 결과, 설계하중 대비 측정하중은 초기균열하중상태에서 약 167%의 단면성능과 극한한계상태에서 약 134% 이상의 내하력을 확보하여 본 실험에서 요구하는 성능을 만족하였다. 이러한 결과는 기존의 강합성 거더교로 제작하는 장지간 교량 대비 약 11%의 상부공사비가 감소하는 것으로 분석되었다. 그러므로, 본 연구를 통하여 개발된 60m 이상 장지간 맞춤형 교량 시스템을 활용한다면 충분한 가격 경쟁력을 확보 할 수 있을 것으로 기대된다.

Keywords

Acknowledgement

본 연구는 한국건설기술연구원 주요사업(북한 인프라 현대화시나리오에 기반한 맞춤형 특화기술 개발 및 건설기준 연계방안수립) 지원에 의해 수행되었습니다.

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