Journal of Korean Association for Spatial Structures (한국공간구조학회논문집)

Korean Association for Spatial Structures (한국공간구조학회)
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Experimental Analysis of Anchorage Zone Design for Unbonded Post-Tensioned Concrete Beam With 2400MPa Single Tendons

2400MPa 단일 강연선이 적용된 포스트텐션 정착 구역 설계에 대한 실험적 연구

  • Received : 2019.11.22
  • Accepted : 2019.12.14
  • Published : 2020.03.15
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Abstract

In this study, the design of anchorage zone for unbonded post-tensioned concrete beam with single tendons of ultimate strength 2400MPa was evaluated to verify that the KDS 14 20 60(2016) and KHBDC 2010 codes are applicable. The experimental results showed that the bursting force equation of current design codes underestimated bursting stress measured by test, because the KDS 14 20 60(2016) and KHBDC 2010 propose the location of the maximum bursting force 0.5h which is the half of the height of member regardless of stress contribution. Although the allowable bearing force calculated by current design codes was not satisfied the prestressing force, the cracks and failure in anchorage zone was not observed due to the strengthening effect of anchorage zone reinforcement.

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References

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