프리스트레스트 콘크리트 박스거더 교량이 시간의존적 특성에 관한 연구

A Study on the Time-dependent Characteristics of Prestressed Concrete Box-Girder Bridge

  • 윤영수 (정회원, 고려대학교 토목환경공학과) ;
  • 이만섭 (정회원, 브이 에스 엘 코리아 (주) 기술담당이사) ;
  • 최한태 (정회원, 고려대학교 토목공학과 대학원)
  • 발행 : 1998.10.01

초록

In designing the prestressed concrete box-bridge, the dead load, prestressing force, creep and shrinkage of concrete are the main factors which influence the camber and deflection of segmental concrete structure under construction. Among these factors the creep and shrinkage are the functions of the time-dependent property which, therefore, must be considered with time. The prediction model for estimating creep and shrinkage of concrete has been suggested by ACI, CEB/FIP, JSCE and KSCE design code and EMM, AEMM, RCM, IDM and SSM has been suggested for analytical method in consideration of the time-dependent characteristics. In this study, the creep test was carried out for four curing ages of concrete which were applied to the prestressed concrete structure at a construction site, and the results of test were compared to the values of creep prediction by the design code. Also the creep test of step-wise incremental stresses were performed and were compared to analytical methods.

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