Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Development of Short-span Precast Concrete Panels for Railway Bridge

철도교용 단지간 프리캐스트 콘크리트패널의 개발

  • Seol, Dae-Ho (Department of Civil Engineering, Seoul National University of Science and Technology) ;
  • Lee, Kyoung-Chan (Korea Railroad Research Institute) ;
  • Kim, Ki-Hyun (Department of Civil Engineering, Seoul National University of Science and Technology) ;
  • Youn, Seok-Goo (Department of Civil Engineering, Seoul National University of Science and Technology)
  • 설대호 (서울과학기술대학교 건설시스템공학과) ;
  • 이경찬 (한국철도기술연구원 고속철도연구본부 첨단인프라연구팀) ;
  • 김기현 (서울과학기술대학교 건설시스템공학과) ;
  • 윤석구 (서울과학기술대학교 건설시스템공학과)
  • Received : 2016.03.28
  • Accepted : 2016.08.18
  • Published : 2016.10.30
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Abstract

This paper presents experimental static test results of the precast concrete panels developed for short-span concrete bridge deck form. Different from LB-DECK, concrete rib attached to the bottom surface of concrete panel, and Top-bar is not used at the top surface of concrete panel. Number of concrete ribs and cross-section details of concrete rib are determined from the analytical results of parametric study considering the span length and the thickness of concrete bridge decks. Shear rebars are installed at the top surface of concrete panel for composite action between precast concrete panel and cast-in-place concrete. In order to evaluate the safety and the serviceability of the developed short-span concrete panel subjected to design load, static load test is conducted. Three test panels with span length of 1.6m are fabricated, and during the load test displacements, strains and cracks of test panels are measured and final failure modes are investigated. Serviceability of the test panels is evaluated based on the results of displacements, cracking load, and crack width at the design load level. Safety is also evaluated based on the comparison of the ultimate strength and the factored design load of test panels. Based on the test results, it is confirmed the short-span precast concrete panel satisfies the serviceability and safety regulated in design codes. In addition, the range of span length of concrete bridge decks for the short-span concrete panel is discussed.

이 논문에는 교량바닥판의 지간장이 짧은 단지간용 프리캐스트 콘크리트패널에 대해 수행한 정적하중 재하실험 결과들을 나타내었다. 단지간용 콘크리트패널은 콘크리트패널 하면에 콘크리트리브가 부착되어 있으며, 기존 LB-DECK과 달리 콘크리트패널 상면에 Top bar가 없는 단면이다. 콘크리트패널에 부착되는 콘크리트리브의 개수와 단면 상세는 교량바닥판의 지간장과 철근콘크리트바닥판 두께 변화에 따른 설계하중에 대해 변수해석 결과를 토대로 결정하였다. 콘크리트패널 상면에는 현장타설되는 콘크리트와 합성거동을 위해 전단철근을 배치하였다. 변수해석을 통해 산정된 콘크리트패널이 설계하중에 대해 사용성과 안전성을 만족하는 가를 확인하기 위해 정적하중 재하실험을 수행하였다. 지간장 1.6 m인 단지간 콘크리트패널 실험체 3개 제작한 후 정적하중 재하하면서 각 실험체의 처짐, 균열, 그리고 최종 파괴양상을 살펴보았다. 설계하중이 작용할 때 각 실험체의 처짐, 균열하중, 그리고 균열폭을 토대로 사용성을 평가하였다. 또한 각 실험체의 최종 파괴양상과 극한강도를 토대로 계수설계하중에 대한 안전성을 평가하였다. 실험 결과 단지간용 콘크리트패널이 사용성과 안전성을 만족하는 것을 확인할 수 있었다. 추가적으로 단지간용 콘크리트패널을 적용할 수 있는 교량바닥판의 지간장 범위를 검토하였다.

Keywords

References

  1. BA 36/90, The use of permanent formwork, DMBR, Vol. 2, Section 3, Feb. 1991.
  2. FHWA, Steel bridge design handbook: Bridge Deck Design, FHWA-IF-12-052, Vol.17, 2012.
  3. Korea Concrete Institute, Concrete Standard Specification, 2009.
  4. Korea Concrete Institute, Concrete Structure Design Code, 2012.
  5. Youn, S. G., Cho, S. K., Lee, J. H., Jeong, J. D., and Won, Y. S. "Punching Shear Strength of Reinforced Concrete Bridge Decks with LB-DECK", Proceedings of the Korea Concrete Institute, 2006, Vol.18, No.2, pp.390-393.
  6. Youn, S. G., Cho, S. K., Lee, J. H., and Won, Y. S., "Punching Shear Strength of Reinforced Concrete Bridge Decks with LB-DECK", REAL STRUCTURES: Bridges and Tall Buildings (EASEC-10), 2006, pp.381-386.
  7. Korea Concrete Institute, Study on the Design and Construction of Precast Concrete Panel (LB-DECK), KCI R 09-005, 2009.
  8. Youn, S. G., and Cho, G. D., "Experimental Study on the Cracking Loads of LB-DECKs with Varied Cross-Section Details", Journal of the Korea Concrete Institute, Vol.23, No.5, 2011, pp.657-665. https://doi.org/10.4334/JKCI.2011.23.5.657
  9. Youn, S. B., Cho, K. D., and Youn, S. G., "Development of the Cantilever LB-DECK", KSCE 2014, Convention 2014 Civil Expo & Conference, 2014, pp.131-132.
  10. Youn, S. G., Park, S. H., and Kim, K. H., "Improvement of Design Details of Reinforced Concrete Deck in Railway Bridges", KSCE 2015, Convention 2015 Civil Expo & Conference, 2015, pp.209-210.
  11. Korea Rail Network Authority, Railway Bridge Design Code (Trackbed Part), 2011.
  12. Eurocode 2, Design of concrete structures, Part 1. General rules and rules for building, ENV 1992-1-1, 1992.