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

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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The Experimental Study of the Ultimate Behavior of an Avalanche Tunnel Corner Rigid Joint Composited with a Centrifugal Formed Beam

초고강도 원심성형 보가 합성된 피암터널 우각부의 극한거동에 관한 실험연구

  • 이두성 ((주)주성이앤씨 기술연구소) ;
  • 김성진 ((주)주성이앤씨 기술연구소) ;
  • 김정회 (아이에스동서(주) 기술연구소)
  • Received : 2022.10.13
  • Accepted : 2022.11.25
  • Published : 2022.12.31
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Abstract

In this study, in order to apply ultra-high-strength concrete beams of 100 MPa or more manufactured by centrifugal molding as the superstructure of the avalanche tunnel, the purpose is to verify the structural safety of the corner rigid joint in which the centrifugal molded beam is integrated with the substructure, which is the negative moment area. A full-size specimen was manufactured, and loading tests and analysis studies were performed. In order to expect the same effect that the maximum moment occurs in the corner joint part of the upper slab end when the standard model of the avalanche tunnel is designed with a load combination according to the specification, a modified cantilever type structural model specimen was manufactured and the corner rigid joint was fixedly connected. A study was performed to determine the performance of the method and the optimal connection construction method. The test results demonstrated that the proposed connection system outperforms others. Despite having differences in joint connection construction type, stable flexural behavior was shown in all the tested specimens. The proposed method also outperformed the behavior of centrifugally formed beams and upper slabs. The behavior of the corner rigid joint analysis model according to the F.E. analysis showed slightly greater stiffness compared to the results of the experiment, but the overall behavior was almost similar. Therefore, there is no structural problem in the construction of the corner rigid joint between the centrifugally formed beam and the wall developed in this study.

본 연구에서는 원심성형으로 제작된 100MPa이상의 초고강도 콘크리트 각형보를 피암터널의 상부구조로 적용하기 위해 원심성형 보를 부모멘트 영역인 하부구조와 일체화시킨 우각부 단면에 대한 구조적인 안전성을 검증하는 것을 목적으로 실물크기의 시험체를 제작하고 하중재하시험 및 해석연구를 수행하였다. 피암터널 표준모델에 대해 시방규정에 의한 하중조합으로 설계하였을 때 상부슬래브 단부의 우각부에 최대 모멘트가 발생하는 것과 같은 효과를 기대하기 위하여 수정된 캔틸레버 형식의 구조모형 시험체를 제작하여 우각부 고정연결방법에 대한 성능과 최적연결시공법을 도출하기 위한 연구가 수행되었다. 실험결과, 개발된 고정연결장치는 형상과 연결방식에 상관없이 모두 안정적인 휨 거동을 나타내었다. 또한, 시험체는 파괴시까지 고정연결장치에 의해 연결된 원심성형 PSC 각형보와 상부슬래브가 일체 거동을 하는 것으로 나타나 고정연결장치의 성능이 매우 우수한 것으로 확인되었다. FEM 해석에 따른 우각부 해석모델의 거동은 재하실험과 비교하여 강성이 미소하게 나타났으나 전체적인 거동이 거의 유사하게 나타났다. 따라서, 본 연구에서 개발한 원심성형 각형보와 벽체간의 우각부 연결부를 시공함에 있어 구조적으로 문제가 없을 것으로 판단된다.

Keywords

Acknowledgement

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

References

  1. Park, S.K. and Kim, M.H. (2010), Seismic performance of precast beam-column joints with thru-connectors, Journal of the Korea Concrete Institute, KCI, 22(4), 441-450. https://doi.org/10.4334/JKCI.2010.22.4.441
  2. Feng, F., Dennis, L. and Jianqiao, Y. (2010), Moment resistance and rotation capacity of semi-rigid composite connections with precast hollowcore slabs, Journal of Constructional Steel Research, 66(3), 452-461. https://doi.org/10.1016/j.jcsr.2009.10.016
  3. Kim, T. H.(2012), Development of High Stregnth Cetrifugal Foremd Concerte Column, DAELIM Technical Review Architectual Engineering, 132-136.
  4. Kim, S. B., Kim, J. H. Jay and Kim, T. K. (2013), Experimental Test on Corner Rigid Joint Connection Method for Underground Roadway Structure, Journal of the Korean Society of Civil Engineers, 33(1), 23-34 (in Korean). https://doi.org/10.12652/Ksce.2013.33.1.023
  5. Kim, J. H., Kim, D. H. and Park, Y. S. (2021), A Study on the Mix Proportion 0f Concrete of Centrifugal Molding Beam, Proceedings of 2021 KCI Conf., KCI, pp. 305-306 (in Korean).
  6. Lee, D. S., Kim, Y. J., Kim, J. H., Kim, D. H. and Park, Y. S. (2021), A Study on the Design and Manufacturing Technology Development of Square Beams manufactured by Cetrifugal molding, Proceedings of 2021 KSCE Conf., KSCE, pp. 619-620 (in Korean).
  7. Kim, J. H., Kim, D. H., Park, Y. S., Lee, D. S. and Kim, Y. J. (2021), A Study on the Calculation of Centrifugal Force for Application of Precast Concrete Beam to Cetrifugal Molding System, Proceedings of 2021 KSMI Conf., KSMI, pp.14 (in Korean).
  8. Lee, D. S., Kim, S. J., Kim, J. H. and Kim, D. H. (2022), Study on Ultimate Behavior of Corner Rigid Joint for Avalanch Tunnel Composite with Cetrifugal Formed Beam, Proceedings of 2022 KSCE Conf., KSCE (in Korean).
  9. Kim, S. J., Lee, D. S., Kim, Y. J., Kim, J. H. and Park, Y. S. (2022), Study on Ultimate Behavior of Centrifugal Formed Prismatic Beam Composited with Deck Slab, Proceedings of 2022 KSCE Conf., KSCE (in Korean).
  10. Korean Concrete Institute. (2012), Design Specifications for Structural Concrete.
  11. Korean Society of Steel Construction. (2011), Korean Steel Structure Design Code and Commentary-Load and Resistance Factored Design.
  12. Korea Road & Transportation Association (KRTA) (2010), Road bridge design specifications (in Korean).
  13. Korea Road & Transportation Association (KRTA) (2016), Road bridge design specifications (in Korean).
  14. Korea Research Institute for Human Settlements (KRIHS) (2003), The Middle and Long Term Investment Strategies of Transportation Social Overhead Capitals (in Korean).
  15. Shin, H. M. (2007), Prestress concrete, 10th Ed., Dong myung sa (in Korean).
  16. Precast/Prestressed Concrete Institute (2003), Precast Prestressed Concrete BRIDGE DESIGN MANUAL (I), (II).
  17. Mitchell, Denis, Cook, William D., Khan, Arshade A. and Tham, Thomas (1993), Influence of high strength concrete on transfer and development length of pretensioning strand, PCI JOURNAL, 38(3), 52-66. https://doi.org/10.15554/pcij.05011993.52.66
  18. Nawy, Edward G. and Huang, P. T. (1977),"Crack and deflection control of pretensioned prestressed beams, PCI JOURNAL, 22(3), 30-47. https://doi.org/10.15554/pcij.05011977.30.47
  19. Midas IT(2004), ANALYSIS & ALGORITHM.