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논문 기본 정보

자료유형
학술저널
저자정보
Yu‑A. Kim (Seoul National University of Science and Technology) Jung‑Soo Lee (Myongji University) Seung‑Hee Kwon (Myongji University) Jin‑Kook Kim (Seoul National University of Science and Technology)
저널정보
한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.18 No.6
발행연도
2024.11
수록면
1,149 - 1,165 (17page)

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초록· 키워드

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Existing concrete creep coefficient prediction models have the limitation of not considering the structural characteristics of CFT. For this reason, these models tend to overestimate the creep deformation of CFT. Therefore, in order to overcome the limitations of existing CFT creep experiments, this study proposes a creep-experiment method involving the use of CFT that passively changes the load applied to a single concrete specimen by calculating the stress redistribution between the concrete and a steel tube in CFT based on a step-by-step method. Furthermore, by actually applying the proposed experimental method, a creep experiment of CFT lasting for approximately 163 days was performed and a superficial creep coefficient model of CFT was proposed based on long-term strain data from the experiment. In order to verify the proposed superficial creep coefficient model, it was compared with two design criteria (CEB-FIP and ACI) based on the experimental results of this study and references. As a result, compared to the existing design criteria, the value predicted by the proposed superficial creep coefficient model showed good agreement with the experimental results of this study and the references, proving that the proposed creep-experiment method of CFT and superficial creep coefficient model are reasonable.

목차

Abstract
1. Introduction
2. Creep Properties of CFT
3. Long‑Term Behavior Analysis Method Considering the Stress Redistribution of CFT
4. Proposal of the Creep‑Experimental Method of CFT
5. Methodology
6. Proposed and Validated Superficial Creep Coefficient Model of CFT
7. Conclusion
References

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