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Derivation of Development Length in Pretensioned Prestressed Concrete Members

프리텐션공법의 프리스트레스트 콘크리트 부재의 정착길이 산정에 관한 실험 및 이론연구

  • 오병환 (정회원, 서울대학교 토목공학과) ;
  • 김의성 (정회원, 현대산업개발 토목설계팀) ;
  • 최영철 (정회원, 서울대학교 토목공학과)
  • Published : 2000.12.01

Abstract

In pretensioned concrete structures, bond between prestressing steel and concrete is an essential component to ensure the integrity of a pretensioned member. The anchorage and development of the prestressing force depend exclusively on bond. The purpose of this study is to investigate the characteristics of bond and development length between pretensioned steel and concrete. To resolve the controversy over the adequacy of the current code provision on development length of prestressing strands, a comprehensive test program has been scheduled and twenty four rectangular prestressed concrete beams have been tested to determine development length. Major test variables include diameter of strands (12.7mm, 15.2mm) and concrete covers (3cm, 4cm, 5cm). The test results indicate that the development length based on the bond stress-slip relation. The proposed model can evaluate realistically the development length of pretensioned prestressed concrete members and can be the good basis for the future basis of code equations on development length of PSC members.

Keywords

References

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