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

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Evaluation of the Load Carrying Capacity on a Rahmen Bridge with Ultra-high Strength Centrifugally Formed Square Beams as the Superstructure

초고강도 원심성형 각형보를 상부구조로 하는 라멘교의 내하성능 평가

  • 이두성 ((주)주성이앤씨 기술연구소) ;
  • 김성진 ((주)주성이앤씨 기술연구소) ;
  • 김정회 (아이에스동서(주) 기술연구소)
  • Received : 2023.12.30
  • Accepted : 2024.01.11
  • Published : 2024.02.28
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Abstract

An ultra-high strength prestressed prismatic beam of 100 MPa in compressive strength was developed by increasing the water-tightness of concrete by utilizing centrifugal molding processes without adding expensive admixtures. The centrifugal prismatic PSC beam developed as the superstructure of the avalanche tunnel was constructed on a rahmen bridge in a small local river. In this study, the centrifugal prismatic beam was compared and analyzed based on the results of measurements made through static load tests and the results of numerical analysis of the target structure. The common load-carrying capacity and safety of the rahmen bridge were evaluated. The static·dynamic load tests and finite element analysis results of this bridge were similar, and it was confirmed that the behavior of the centrifugal prismatic beam was well simulated. All centrifugally formed square beams that make up the composite rahmen bridge were evaluated to secure sufficient load carrying capacity under the design live load, and structural reliability was proven by ensuring safety.

고가의 혼화재 투입 없이 원심성형 공정 활용으로 콘크리트의 수밀성 증대를 통한 콘크리트 압축강도가 100MPa급인 초고강도 프리스트레스 각형보를 개발하였다. 피암터널 상부구조로 개발된 원심성형 각형보를 지역 소하천의 라멘교에 시공하였으며, 본 연구에서는 정적재하시험을 통하여 계측한 결과와 대상 구조물의 수치해석 결과를 바탕으로 비교, 분석하여 원심성형 각형보 라멘교의 공용내하력과 안전성을 평가하였다. 본 교량의 정·동적 재하시험과 수치해석 결과가 유사하게 나타났으며 원심성형 각형보의 거동을 잘 모사하는 것으로 확인되었다. 합성 라멘교를 구성하는 모든 원심성형 각형보는 설계활하중 하에서 충분한 내하력을 확보하는 것으로 평가되었고 안전성을 확보하여 구조적인 신뢰성을 입증하였다.

Keywords

Acknowledgement

본 연구는 2021년 국토교통부(국토교통과학기술진흥원) 국토교통기술사업화지원사업 '원심성형으로 제작된 100MPa 급 초고강도 직사각형 보의 제작기술 및 이를 상부구조로 하는 피암터널 공법개발(21TBIP-C161317-02)'를 통해 수행된 연구입니다. 연구지원에 감사합니다.

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