Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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Revaluation of Nominal Flexural Strength of Composite Girders in Positive Bending Region

정모멘트부 강합성거더의 공칭휨강도 재평가

  • Youn, Seok Goo (Department of Civil Engineering, Seoul National University of Science & Technology)
  • Received : 2012.10.04
  • Accepted : 2013.03.26
  • Published : 2013.04.27
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Abstract

This paper presents a research work for the evaluation of the nominal flexural strength of composite girders in positive bending region. Current predicting equations for the nominal flexural strength of composite girders in the 2012 version of the Korea Bridge Design Codes based on Limit State Design Method are able to apply for the composite girders with conventional structural steels. For applying composite girders with high yield strength steels of HSB800 as well as HSB600, there is a need for improving the current predicting equations. In order to investigate the nominal flexural strength of composite girders, previous research works are carefully reviewed and parametric study using a moment-curvature analysis program is conducted to evaluate the ultimate moment capacity and the ductility of a wide range of composite girders. Based on the results of the parametric study, less conservative nominal flexural strength design equations are proposed for conventional composite girders. In addition, new design equations for predicting the nominal flexural strength of composite girders with HSB600 and HSB800 high-performance steels are provided.

이 논문에는 정모멘트를 받는 강합성거더의 공칭휨강도를 평가하기 위한 연구를 수록하였다. 한계상태설계법을 적용한 현행 도로교설계기준(2012)에 제시된 합성거더의 휨강도 규정은 국내에서 생산되는 일반구조용 강재를 사용한 합성거더에 적용할 수 있다. 고성능 강재 HSB600뿐만 아니라 HSB800를 적용한 강합성거더에 적용하기 위해서는 현행 공칭휨강도 평가식을 개선해야될 필요성이 있다. 강합성거더의 공칭휨강도를 평가하기 위하여, 기존에 수행된 연구들을 고찰하였으며 모멘트-곡률해석방법을 이용하여 다양한 단면을 갖는 강합성거더의 극한휨강도와 연성비를 평가하기 위한 변수해석을 수행하였다. 변수해석결과를 토대로 일반강재를 적용한 강합성거더에 대해 기존 평가식보다 덜 보수적인 공칭휨강도 평가식을 제안하였다. 또한 고성능 강재 HSB600과 HSB800을 적용한 강합성거더의 새로운 공칭휨강도 평가식도 함께 제안하였다.

Keywords

References

  1. Eurocode 3 (1992) Design of Steel Structures, Part 1.1 General rules and rules for buildings, ENV 1993-1-1:1992.
  2. AASHTO (2007) AASHTO LRFD Bridge Design Specifications, 4th Ed., Washington, D.C.
  3. Eurocode 4 (1997) Design of Composite Steel and Concrete Structures, Part 2. General rules and rules for bridges, ENV 1994-2:1997.
  4. 한국도로교통협회 (2012) 도로교설계기준 (한계상태설계법). Korea Road & Transportation Association (2012) Highway Bridge Design Codes (Limit State Design Method). (in Korean)
  5. Wittry, D.M. (1993) An Analysis Study of the Ductility of Steel-Concrete Composite Sections, MS thesis, University of Texas-Austin, Austin, Tex.
  6. Rotter, J.M., and Ansourian, P. (1979) Cross-section behaviour and ductility in composite beams, Proceedings of the Institution of Civil Engineers, London, England, Part 2, Vol. 67, pp. 453-474.
  7. Ansourian, P. (1982) Plastic Rotation of Composite Beams, Journal of Structural Division, ASCE, Vol. 108, No. ST3, pp.643-659.
  8. Yakel, A.J. and Azizinamini, A. (2005) Improved Moment Strength Prediction of Composite Steel Plate Girders in Positive Bending, Journal of Bridge Engineering, ASCE, Vol. 10, No. 1, pp.28-38. https://doi.org/10.1061/(ASCE)1084-0702(2005)10:1(28)
  9. Barth, K.E. and Roberts, N.R. (2009) Flexural Capacity of Compact Composite I-Girders in Positive Bending, Journal of Bridge Engineering, ASCE, Vol. 14, No. 4, pp.238-246. https://doi.org/10.1061/(ASCE)1084-0702(2009)14:4(238)
  10. 조은영, 신동구 (2010) HSB 강합성거더 정모멘트부의 휨저항강도, 한국강구조학회 논문집, 한국강구조학회, 제22권, 제4호, pp.389-398. Cho, E.Y. and Shin, D.K. (2010) Flexural Strength of Compoiste HSB Girders in Positive Moment, Journal of Korean Society of Steel Construction, KSSC, Vol. 22, No. 4, pp.389-398 (in Korean).
  11. 조은영, 신동구 (2010) HSB 강합성거더 정모멘트부 휨 거동, 한국강구조학회 논문집, 한국강구조학회, 제22권, 제4호, pp.377-388. Cho, E.Y. and Shin, D.K. (2010) Flexural Behavior of Composite HSB I-Girders in Positive Moment, Journal of Korean Society of Steel Construction, KSSC, Vol. 22, No. 4, pp.377-388 (in Korean).
  12. 조은영, 신동구 (2011) HSB 강재 적용 강합성 보갑단면 거더 정모멘트부의 휨저항강도, 한국강구조학회 논문집, 한국강구조학회, 제23권, 제3호, pp.385-392. Cho, E.Y. and Shin, D.K. (2011) Flexural Strength of Composite HSB Hybrid Girders in Positive Moment, Journal of Korean Society of Steel Construction, KSSC, Vol. 23, No. 3, pp.385-392 (in Korean).
  13. AASHTO. (2001) AASHTO LRFD bridge design specifications, 2nd Ed., Washington, D.C.
  14. Comite Euro-International du Beton (CEB) (1990) CEB-FIP Model Code, Thomas Telford, Laussance, Switzerland.
  15. Youn, S.G., Bae, D., and Kim, Y.J. (2008) Ultimate Flexural Strength of Hybrid Composie Girders Using High-Performance Steel of HSB600 at Sagging Bending, Proceedings of the 2008 Composite Construction in Steel and Concrete VI, ASCE, Colorado, pp.680-690.

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  2. Flexural Resistance and Ductility Ratio of Composite Hybrid I-Girder using HSB High Performance Steel in Positive Bending vol.26, pp.3, 2014, https://doi.org/10.7781/kjoss.2014.26.3.205
  3. HSB600 강재의 변형-경화를 고려한 강합성 I-거더의 정모멘트부 공칭휨강도 vol.29, pp.1, 2017, https://doi.org/10.7781/kjoss.2017.29.1.001