KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Improved Method for Indeterminate forces of Two-span Steel-concrete Composite Girders

2경간 연속 강합성거더의 개선된 부정정력 계산 방법

  • Received : 2012.09.27
  • Accepted : 2012.12.17
  • Published : 2013.03.30
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Abstract

The k-factor method has been widely used in design of steel-concrete composite bridges to determine indeterminate stresses. The accuracy of k-factor method is examined by a comparative analysis with the equivalent load method in a continuous 2-span composite bridge. To improve the accuracy, the direction of creep stress has to be modified and the variety of section must be considered. This paper suggests j-factor method which can improve the accuracy of k-factor method with simple modification.

k-factor법은 합성교량의 설계에서 부정정 응력을 산정하는 방법으로 널리 사용되고 있다. 이 방법의 적정성을 평가하기 위하여 2경간 연속 강합성거더에 대하여 등가하중법과 비교하였다. k-factor법은 크리프에 대해서는 강재응력을 과소평가하고, 부모멘트 구간에서는 응력의 방향을 반대로 산정하며, 건조수축이나 온도차에 대해서는 단면변화를 고려하지 못하는 것을 확인하였다. 이 논문에서는 k-factor법의 정확성을 개선하면서, 계산의 편리성은 유지할 수 있는 j-factor법을 제안하였고, 그 효과를 2경간 연속 강합성거더에 적용하여 검증하였다.

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References

  1. Edward G. Nawy (1996). Prestressed Concrete, Prentice-Hall, Inc.
  2. Gee, Goo Sam (2012). A study on creep & shrinkage stress in composite bridges. Master Thesis, Hanyang University (in Korean).
  3. GHALI, A., FAVRE, R., and ELBADRY, M. (2002). Concrete Structures Stresses and Deformations - Third Edition. Spon Press.
  4. Go, Sang Eun (2000). Long-term behaviour of prestressed composite beams, Master Thesis, Hanyang University (in Korean).
  5. KSCE (2003). "Standards and Explanations for Road Bridge Design" (in Korean).
  6. Lee, Jong Deuk (1999). Stress and Deformation of Concrete Structure, IlGwang (in Korean).
  7. Lee, Pil Goo (2008). Evaluation for Creep and Shrinkage Losses of Prestressed Steel-Concrete Composite Girders. Ph.D Thesis, Seoul National University (in Korean).
  8. Ministry of Land, Transport and Maritime Affairs of South Korea (2008). "Road Design Manual, Chapter 5. Bridge" (in Korean).
  9. Ministry of Land, Transport and Maritime Affairs of South Korea (2010). "Standards for Road Bridge Design" (in Korean).