Feasibility Evaluation on Design Anchorage Length for Grade 700 MPa Straight Tension Reinforcing Bars

Dong-Uk Kwon; Jae-Hoon Lee

doi:10.22725/JSRP.2023.1.1.1

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2023 Vol.1, Issue 1 Next Page

Research Article

Feasibility Evaluation on Design Anchorage Length for Grade 700 MPa Straight Tension Reinforcing Bars 700 MPa급 직선 인장철근에 대한 설계 정착길이 적용성 평가

31 December 2023. pp. 1-12

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Abstract

Grade 700 MPa deformed steel reinforcement bars has been specified in the Korean standard KS D 3504 since 2007. However the Korean Concrete Bridge Design Code KDS 24 14 21 defines the maximum specified yield strength of reinforcing bar shall not exceed 600 MPa, since enough experimental results have not been provided to prove the structural performance of reinforced concrete members with 700 MPa level of yield strength steel. In this study, the accuracy, safety, and applicability of the design anchorage length equation specified in the Korean Concrete Bridge Design Code KDS 24 14 21 were investigated for the experimental test data of the anchorage length of straight tensile deformed bars. As a result of analyzing a total of 285 experimental results, it is concluded that the design anchorage length equation can be applicable to the high strength straight tensile deformed bars with 700 MPa level of yield strength.

Keywords

Korean Concrete Bridge Design Code

straight deformed steel bar

anchorage length

high strength steel

yield strength of 700 MPa

한국의 철근표준 KS D 3504는 2007년판부터 항복강도가 700 MPa인 SD700 철근 규격을 규정하고 있으나, 항복강도 700 MPa급 철근을 적용한 철근콘크리트 부재의 실험결과로 구조성능을 입증한 연구 자료가 충분하지 않으므로, 콘크리트교 설계기준 KDS 24 14 21에서는 설계기준항복강도가 600 MPa 이하인 철근을 적용하도록 제한하고 있다. 이 연구에서는 직선 인장 이형철근의 정착성능 실험결과를 대상으로 콘크리트교 설계기준 KDS 24 14 21에 규정된 설계정착길이 계산식의 정확도 및 안전성과 고강도 철근에 대한 적용성을 분석하였다. 총 285개의 실험결과를 분석한 결과, 콘크리트교 설계기준 KDS 24 14 21에 규정된 설계정착길이 계산식은 항복강도 700 MPa급의 직선 인장 이형철근에도 적용이 가능한 것으로 판단된다.

키워드

콘크리트교 설계기준

직선 인장 이형철근

정착길이

고강도 철근

항복강도 700 MPa

References

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Information

Publisher :Korean Institute of Bridge and Structural Engineers
Publisher(Ko) :한국교량및구조공학회
Journal Title :Journal of Structure Research and Practice
Journal Title(Ko) :한국교량및구조공학회 논문집
Volume : 1
No :1
Pages :1-12
Received Date : 2023-11-29
Revised Date : 2023-12-05
Accepted Date : 2023-12-05
DOI :https://doi.org/10.22725/JSRP.2023.1.1.1

Journal of Structure Research and Practice ISSN:3022-4241(Print) 3022-7267(Online) 한국교량및구조공학회 논문집

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