Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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Analysis of Shear Behavior of Shear Key for Concrete Track on Railway Bridge Considering Construction Joint

타설 경계면을 고려한 철도교 콘크리트궤도 전단키의 전단 거동 해석

  • Lee, Seong-Cheol (Department of NPP Engineering, KEPCO International Nuclear Graduate School) ;
  • Kang, Yun-Suk (Metropolitan Transportation Research Center, Korea Railroad Research Institute) ;
  • Jang, Seung Yup (High-Speed Railroad System Research Center, Korea Railroad Research Institute)
  • Received : 2016.01.20
  • Accepted : 2016.05.04
  • Published : 2016.06.30
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Abstract

Concrete track on railway bridges should be designed to effectively respond to the movement of the superstructure of the bridge. In the design procedure, shear keys are generally placed on the protection concrete layer (PCL) before casting the concrete track so the shear force due to slip between the concrete track and the bridge super-structure can be transferred. In this paper, a nonlinear structural analysis procedure that considers the construction joint has been developed to predict the shear behavior of a shear key. With the developed analysis procedure, it was possible to predict the shear force-shear slip response at the construction joint in a shear key by considering the friction of concrete surface and the dowel action of the rebars. The analysis results showed good agreement with the test results for 4 specimens.

철도교량 구간의 콘크리트 궤도는 교량 상부구조의 움직임에 효과적으로 대응할 수 있도록 설계되어야 한다. 이를 위해 일반적으로 전단키로 명명되는 전단키를 교면 보호 콘크리트층(PCL) 위에 일정 간격으로 설치하여 그 위에 궤도 슬래브를 타설함으로써 궤도와 교량 상부구조의 상대 변위에 의해 발생하는 전단력을 전달하도록 설계하고 있다. 이 연구에서는 전단키의 전단 거동을 예측하기 위해 타설 경계면을 고려한 비선형 구조 해석 방법을 제시하였다. 제시된 해석 방법은 콘크리트 면에서의 마찰력과 철근의 다월 거동을 고려함으로써 전단키 타설 경계면(시공이음부)에서의 전단력-전단 미끌림 거동을 예측할 수 있으며, 해석 결과 4개의 시험체에 대한 실험 결과를 잘 예측하는 것으로 나타났다.

Keywords

References

  1. International Union of Railways (2001) Track/bridge Interaction Recommendations for Calculations, UIC Code 774-3R.
  2. I.-Y. Choi, H.-C. Cho, S.-C. Yang, J.-Y. Choi (2009) Development of design chart for investigating an additional rail stress and displacements on CWR (II) Design chart for railway bridge of conventional line, Journal of the Korean Society for Railway, 12(4), pp. 574-581.
  3. I.-Y. Choi, H.-C. Cho, S.-C. Yang, J.-Y. Choi, J.Y. Yu (2009) Development of design chart for investigating an additional rail stress and displacements on CWR (I) Design chart for high-speed railway bridge, Journal of the Korean Society for Railway, 12(4), pp. 565-573.
  4. C. Esveld (2001) Modern Railway Track, MRT-Productions, Zaltbommel, The Netherlands, p. 653.
  5. DB Systemtechnik (2002) Requirements Catalog for the Construction of Fixed Track, 4th ed. (in German).
  6. http://www.railone.de/en/products-solutions/railways-and-commuter-traffic/ballastless-track-systems/rheda-2000r.html (Accessed on June 2016).
  7. Korea Railroad Technical Corporation (2006) Execute Design of Track for Gyeong-Bu High Speed Line 2nd Phase(Dong-Daegu-Busan), Korea Railway Network Authority.
  8. British Standards Association (2004) Eurocode 2: Design of Concrete Structures - Part 1-1: General Rules and Rules for Buildings, BS EN 1992-1-1.
  9. F.J. Vecchio, D. Lai (2004) Crack shear-slip in reinforced concrete elements, Journal of Advanced Concrete Technology, 2(3), pp. 289-300. https://doi.org/10.3151/jact.2.289
  10. J.C. Walraven (1981) Fundamental analysis of aggregate interlock, ASCE Journal of the Structural Division, 107(11), pp. 2245-2270.
  11. P. Soroushian, K. Obaseki, M.C. Rojas, J. Shim (1986) Analysis of dowel bars acting against concrete core, ACI Structural Journal, 83(4), pp. 642-649.
  12. P. Soroushian, K. Obaseki, M.C. Rojas, H.S. Najm (1987) Behavior of bars in dowel action against concrete cover, ACI Structural Journal, 84(2), pp. 170-175.
  13. N. Randl (2007) Load bearing behaviour of cast-in shear dowels, Beton-und-Stahlbetonbau, 102, pp. 31-37. https://doi.org/10.1002/best.200710103
  14. Y.-S. Kang et al. (2015) Study on Design Standards of Track Systems for the High-Speed Railway at 400km/h, Final Report, Korea Railroad Research Institute, Korea Agency for Infrastructure Technology Advancement, Korea Ministry of Land, Infrastructure and Transport.
  15. K. Maekawa, H. Okamura, A. Pimanmas (2003) Non-linear mechanics of reinforced concrete, CRC Press, p. 768.