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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.11 No.1
- 발행연도
- 2017.3
- 수록면
- 115 - 133 (19page)
이용수
초록· 키워드
오류제보하기
To investigate the effectiveness of using fiber reinforced polymer (FRP) sheets in confining heat-damaged columns, 15 circular RC column specimens were tested under axial compression. The effects of heating duration, stiffness and thickness of the FRP wrapping sheets were examined. Two specimen groups, six each, were subjected to elevated temperatures of 500 _C for 2 and 3 h, respectively. Eight of the heat-damaged specimens were wrapped with unidirectional carbon and glass FRP sheets. Test results confirmed that elevated temperatures adversely affect the axial load resistance and stiffness of the columns while increasing their ductility and toughness. Full wrapping with FRP sheets increased the axial load capacity and toughness of the damaged columns. A single layer of the carbon sheets managed to restore the original axial resistance of the columns heated for 2 h yet, two layers were needed to restore the axial resistance of columns heated for 3 h. Glass FRP sheets were found to be less effective; using two layers of glass sheets managed to restore the axial load carrying capacity of columns heated for 2 h only. Confining the heatdamaged columns with FRP circumferential wraps failed in recovering the original axial stiffness of the columns. Test results confirmed that FRP-confining models adopted by international design guidelines should address the increased confinement efficiency in heat-damaged circular RC columns.
목차
Abstract
1. Introduction
2. Experimental Program
3. Test Results
4. Theoretical Strength Predictions of FRPConfined Columns
5. Conclusions
References
참고문헌 (77)
참고문헌 신청
ACI 211.1-91. (1991). Standard practice for selecting proportions for normal, heavyweight and mass concrete (reapproved 2009). Farmington Hills, MI: American Concrete Institute.
ACI 318-14. (2014). Building code requirements for structural concrete (ACI 318-14) and commentary. Farmington Hills, MI: American Concrete Institute.
ACI 440.2R. (2008). Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures. Farmington Hills, MI: American Concrete Institute.
Al Abadi, H., Abo El-Naga, H., Shaia, H., & Paton-Cole, V. (2016). Refined approach for modelling strength enhancement of FRP-confined concrete. Construction and Building Materials, 119(30), 152?174.
Al-Kamaki, Y., Al-Mahaidi, R., & Bennets, I. D. (2015). Experimental and numerical study of the behaviour of heatdamaged RC circular columns confined with CFRP fabric. Composite Structures, 133, 679?690.
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UCI(KEPA) : I410-ECN-0101-2017-532-002243772