Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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Improvement in Long-term Behavior Estimation of Prestressed Composite Girders for Various Construction Sequences using Parametric Study

변수해석을 통한 프리스트레스트 합성거더의 시공단계별 장기거동 평가법 개선방안

  • Bae, Doobyong (School of Civil and Environmental Engineering, Kookmin University) ;
  • Oh, Chang Kook (School of Civil and Environmental Engineering, Kookmin University)
  • 배두병 (국민대학교, 건설시스템공학부) ;
  • 오창국 (국민대학교, 건설시스템공학부)
  • Received : 2012.12.14
  • Accepted : 2013.07.24
  • Published : 2013.08.27
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Abstract

The age-adjusted effective modulus method has been known to provide more precise assessment than the traditional Yassumi method for long-term behavior estimation of prestressed composite girders. The age-adjusted effective modulus method, however, involves complicated calculation, thereby making the Yassumi method more prevalent in actual design. This study presents rational approaches to revise creep coefficients for the Yassumi method by using parametric study results obtained from the age-adjusted effective modulus method.

합성거더 하부 콘크리트에 프리스트레스를 도입한 프리스트레스트 합성거더의 크리프와 건조수축 평가 시 재령보정 유효탄성계수방법을 이용하면 기존의 야쓰미 해법을 이용한 경우보다 더 정확한 결과를 산출할 수 있다. 하지만, 재령보정 유효탄성계수방법은 산출방법이 복잡하므로 실무에서는 야쓰미 해법을 이용하여 장기거동을 해석하는 것이 일반적이다. 이러한 단점을 보완하기 위하여 이 연구에서는 재령보정 유효탄성계수방법에 의해 여러 시공단계별 재령일수에 따른 변수해석을 수행하고, 야쓰미 해법에 의한 장기거동 해석 시 크리프계수를 보정하여 실무에서 합리적으로 반영할 수 있는 방법을 제시하였다.

Keywords

References

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