Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Development and Performance Test for Unbonded Post-Tensioned Anchor

비부착 강연선에 대한 포스트텐션 정착구 개발 및 성능 시험

  • Cho, Ah Sir (Dept. of Architecture and Architectural Engineering, Seoul National University) ;
  • Jo, Yeong Wook (Residential Structural Team, Engineering & Construction Group, Samsung C&T Corporation) ;
  • Jeon, Byong Kap (Residential Structural Team, Engineering & Construction Group, Samsung C&T Corporation) ;
  • Kang, Thomas H.K. (Dept. of Architecture and Architectural Engineering, Seoul National University)
  • 조아서 (서울대학교 건축학과) ;
  • 조영욱 (삼성물산주식회사 건설부문 주택ENG팀) ;
  • 전병갑 (삼성물산주식회사 건설부문 주택ENG팀) ;
  • 강현구 (서울대학교 건축학과)
  • Received : 2014.03.03
  • Accepted : 2014.11.11
  • Published : 2015.02.28
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Abstract

An unbonded post-tensioned anchor using a 15.2 mm diameter 7-wire strand was developed based on finite element analysis and experimental testing. In order to evaluate its performance, static load tests and load transfer tests were conducted following KCI-PS101. The static load tests and additional strand tensile tests confirmed that the developed anchor had a capacity more than nominal tensile strength of a 7-wire strand without any damage or deterioration. According to the result of load transfer tests for many different reinforcing details, specimens with no additional reinforcing bars sustained at least 1.64 times the nominal tensile strength of the strand.

본 연구에서는 유한요소해석을 통하여 직경 15.2 mm의 비부착식 강연선을 위한 포스트텐션 1구 정착구를 개발하였고 이에 대한 성능시험을 수행하였다. 정착장치에 대한 성능시험으로 콘크리트 표준시방서에 따라 KCI-PS101에 제시된 정하중시험과 하중전달시험 방법이 사용되었다. 정하중시험과 강연선 인장시험을 통하여 개발된 정착구가 강연선 공칭인장강도에도 손상 및 파괴되지 않음을 확인하였다. 하중전달시험을 통해서는 각종 철근보강에 따른 실험체의 압축성능을 확인하였고, 무보강 실험체가 강연선 인장강도의 1.64배까지 저항할 수 있다는 결과를 얻었다.

Keywords

References

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  1. Load Transfer Test of Spirally Reinforced Anchorage Zone for Banded Tendon Group vol.17, pp.1, 2017, https://doi.org/10.9712/KASS.2017.17.1.059
  2. Comparative Study of Bursting Force Equations for Post-Tensioned Anchorage Zones vol.17, pp.4, 2017, https://doi.org/10.9712/KASS.2017.17.4.069
  3. Load-Carrying Performance and Hydrostatic Tests of Encapsulated Anchor Systems for Unbonded Post-Tensioning Single-Strands vol.12, pp.1, 2018, https://doi.org/10.1186/s40069-018-0233-z
  4. Development and Analysis of Unbonded Post-tensioned Anchorage for Single Tendon vol.31, pp.1, 2018, https://doi.org/10.7734/COSEIK.2018.31.1.39