A Study on the Flexural Behavior of Concrete Filled Steel Tube Girder in Parametrically Varied Filling and Composition

충전 및 합성조건 변화에 따른 콘크리트 충전강관 거더의 휨거동에 관한 연구

  • 진원종 (한국건설기술연구원 구조교량연구실) ;
  • 강재윤 (한국건설기술연구원 구조교량연구실) ;
  • 최은석 (한국건설기술연구원 구조교량연구실) ;
  • 이정우 (한국건설기술연구원 구조교량연구실)
  • Received : 2007.12.27
  • Accepted : 2008.12.28
  • Published : 2009.03.31

Abstract

A new bridge system described in this paper uses concrete-filled steel tube (CFT) girders as a replacement for conventional girders. Experimental investigations were carried out to comprehend the flexural behavior of CFT girder. Specimens were manufactured considering several parameters such as the strength of filling material, the eventual presence and number of inner shear connectors to evaluate the bending bearing capacity of CFT girder. The experimental investigation consisted of designing and constructing a test specimen and loading it to collapse in bending to check the applicability of the system. Test results showed that concrete filled steel tube girders have good ductility and maintain their strength up to the end of the loading. The stiffening effect of the ㄱ-shaped perfobond rib is determined to contribute relatively to the increase of the bending bearing capacity.

Acknowledgement

Grant : 콘크리트 충전 강관거더를 이용한 강합성 교량구조 개발

References

  1. 이흥수(2006) ㄱ형 Perfobond 리브 전단연결재의 전단거동.
  2. 정철헌, 이흥수, 박종면, 김영호(2004) 합성작용을 위한 새로운 Perfobond 전단연결재, 대한토목학회 논문집, 대한토목학회, 제24권 제3A호, pp. 525-532.
  3. 한국건설기술연구원(2004) 콘크리트 충전 강관거더의 설계 및 시공에 관한 연구.
  4. 한국건설기술연구원(2006) 콘크리트 충전 강관거더를 이용한 강합성 교량구조 개발(1차년도).
  5. Nakamura, S., Hosaka, T., and Nishiumi, K. (2004) Bending behavior of steel pipe girders filled with ultralight mortar, Journal of Bridge Engineering, Vol. 9, No. 3, pp. 297-303. https://doi.org/10.1061/(ASCE)1084-0702(2004)9:3(297)
  6. Elchalakani, M., Zhao, X.L., and Grzebieta, R.H. (2001) Concretefilled circular steel tube subjected to pure bending. Journal of Constructional Steel Research 57, pp. 1141-1168. https://doi.org/10.1016/S0143-974X(01)00035-9
  7. Hosaka, T., Nakamura, S., Umehara, R., and Nishiumi, K. (1997) Design and experiments on a new railway bridge system using concrete filled steel pipes, International Conference of IABSE in Innsbruck.
  8. Matsumura, T., Hosaka, T., Hiraoka, C., and Nichiumi. K. (2003) Practical application of composite bridge for Shinkansen using CFT, IABSE Symposium in Antwerp, Vol. 87, pp. 136-137.
  9. Nakamura, S. (2000) New Structural forms for steel/concrete composite bridges, Structural Engineering International, Journal of IABSE, Vol. 10, No. 1, pp. 45-50. https://doi.org/10.2749/101686600780620955
  10. Veldanda, M.R. and Hosain, M.U. (1992) Behavior of perfobond rib shear connectors in composite beams : push-out tests, Canadian Journal of Civil Engineering, Vol. 19, No. 1, pp. 1-10. https://doi.org/10.1139/l92-001