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논문 기본 정보

자료유형
학술저널
저자정보
Sanghyeon Cho (Kyung Hee University) Wonseok Chung (Kyung Hee University) Woo‑tai Jung (Korea Institute of Civil Engineering and Building Technology) Jong‑sup Park (Korea Institute of Civil Engineering and Building Technology) Heeyoung Lee (Chosun University)
저널정보
한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.18 No.6
발행연도
2024.11
수록면
1,119 - 1,137 (19page)

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초록· 키워드

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This study aimed to address the critical issue of age deterioration in prestressed concrete (PSC) structures by investigating the strengthening of aged PSC structures using a near-surface mounted (NSM) post-tensioned carbon fiber-reinforced polymer (CFRP). A total of nine PSC beams, each with a length of 6.5 m, were fabricated for a four-point bending test. Various experimental parameters were taken into account, including the strengthening method, compressive strength of concrete in the PSC beam, and the prestressing force of the PSC beam. The results indicated that the NSM post-tensioned CFRP strengthening system proved more efficient when compared to the NSM non-post- tensioned CFRP strengthening system. The flexural capacity of the NSM post-tensioned CFRP strengthening system, under the deteriorated low-strength PSC beam, increased by up to 30.9% compared to the PSC reference beam. Additionally, the experimental results were compared to a finite-element analysis, and a parametric study was conducted to examine the material properties of the PSC beam. Consequently, the NSM post-tensioned CFRP strengthening system is expected to be an effective solution for addressing the issue of deteriorated low-strength PSC structures.

목차

Abstract
1. Introduction
2. Design of NSM Post‑Tensioned CFRP Strengthening System
3. Experimental Method
4. Experimental Results
5. Finite‑Element Analysis
6. Parametric Study Using The Suggested Finite‑Element Model
7. Conclusion
References

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