DOI QR코드

DOI QR Code

The Load Transfer Performance of Post-tension Anchorage with 2,400 MPa Strands

2,400 MPa 강연선용 포스트텐션 정착구의 하중전달성능

  • 김선우 (상지대학교 건설시스템공학과) ;
  • 노병철 (상지대학교 건설시스템공학과) ;
  • 임정훈 (상지대학교 건설시스템공학과)
  • Received : 2018.07.17
  • Accepted : 2018.10.29
  • Published : 2018.11.01

Abstract

Strands with ultimate strength of 2,400 MPa was developed and applied in the KCI Code and the KS standard. A high-strength prestressed strand to be applied to a structure, a suitable anchorage system should be used together. Recently, a post tension anchorage for 2,400 MPa strands was developed. but there is not much research on performance evaluation. Therefore, in this study, structural analysis of local zone with 9 strands, 15 strands, and 19 strands anchorage were investigated respectively, which are most widely used for post tensioning anchorages with 2,400 MPa strands, according to PTI anchorage zone design method, and Load transfer performance from ETAG013 and/or KCI-PS101 was evaluated. Furthermore, the adequacy of the test was also analyzed by nonlinear numerical analysis. As results, the anchorages with 2,400 MPa strands satisfied the structural performance of the local area and satisfied the load transfer performance condition.

인장강도가 2,400 MPa인 강연선이 개발되어 콘크리트구조기준 및 KS 규격에 반영되었다. 고강도 프리스트레스트 강연선이 구조물에 적용되기 위해서는 그에 적합한 정착시스템이 함께 사용되어야 한다. 최근에 2,400 MPa 강연선 적용을 위한 포스트텐션 정착구의 개발이 진행되어왔으나, 성능평가에 대한 연구가 미비한 실정이다. 따라서 본 연구에서는 2,400 MPa 강연선을 적용한 포스트텐션 정착구 중 가장 활용도가 높은 9 가닥, 15 가닥, 19 가닥 정착구에 대하여 PTI의 Anchorage Design Zone에 의한 국소구역 구조검토를 실시하였고, ETAG013 및 KCI-PS101에 의한 하중전달성능평가를 수행하였다. 또한 비선형 수치해석을 통해 시험의 적절성을 분석하였다. 그 결과, 2,400 MPa 정착구는 국소구역의 구조성능을 만족하고, 하중전달성능 조건을 만족하는 것으로 나타났다.

Keywords

References

  1. Choi, K. H., Lho, B. C., and Lim, J. H. (2016), A Study on the Design of Special Circular Plate Anchorage for Post-tension, Journal of the Korea Institute for Structural Maintenance and Inspection, KSMI, 20(6), 73-83. https://doi.org/10.11112/jksmi.2016.20.6.073
  2. Kim, J. K., Seong, T. R., and Lee, J. K. (2012), Development of 2,160 MPa/2,400 MPa PS Strand and its Application Technology, Magazine of the Korea Concrete Institute, Korea Concrete Institute, 24(3), 45-50. https://doi.org/10.4334/JKCI.2012.24.1.045
  3. Korean Institute of Bridge and Structural Engineers (2015), Highway Bridge Design Specification for Limit State Design, KOR, 5-214.
  4. Park, H. and Cho, J. Y. (2012), Flexural Analysis of Posttensioned Prestressed Concrete Beam with 2,160 MPa and 2,400 MPa Prestressing Strands, Spring Conference of the Korean Society for Railway, The Korean Society for Railway, 1278-1283.
  5. Post-Tensioning Institute (2000), Anchorage Zone Design, PTI, USA, 4-9.
  6. Prestressed Concrete Committee (2014), Design and Construction Method for Prestressed Concrete Structures and Plant Structures, KCI, KOR, 37.

Cited by

  1. 2400MPa 단일 강연선이 적용된 포스트텐션 정착 구역 설계에 대한 실험적 연구 vol.20, pp.1, 2018, https://doi.org/10.9712/kass.2020.20.1.41