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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.13 No.6
- 발행연도
- 2019.9
- 수록면
- 727 - 737 (11page)
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초록· 키워드
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This research describes the results of an experimental work that aimed to investigate the flexural capacity of RC columns with low longitudinal reinforcement ratio that was strengthened with near surface mounted GFRP bars. The experimental program consisted of four square reinforced concrete columns, including one control specimen that were designed with a longitudinal reinforcement ratio below the minimum required ratio of 1% specified by RC design codes. Three of the four specimens were strengthened with different ratios NSM GFRP bar. The specimens were tested under a combined axial compressive load and lateral cyclic displacement to evaluate this retrofit method for the flexural improvement of RC columns. The efficacy of the proposed strengthening method on the flexural capacity, failure modes, hysteretic curves, energy dissipation capacity, and stiffness are discussed on the basis of the test results. The experimental results demonstrated that the contribution of GFRP bars to the flexural capacity of RC columns was significant. Also, an analytical procedure for calculating the bending moment capacity of RC columns strengthened with GFRP bars subjected to axial and lateral is proposed. The model accuracy is demonstrated by comparing the model predictions with the experimental results. The flexural capacity calculated by this method were in good agreement with the experimental results.
목차
Abstract
1. Introduction
2. Test Program
3. Experimental Results
4. Analytical Calculations
5. Summary and Conclusions
References
참고문헌 (29)
참고문헌 신청
ACI 440.2R-17. (2017). Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures.
ACI Committee 318. (2014). Building code requirements for structural concrete (ACI 318M-14).
Badawi, M., & Soudki, K. (2009). Flexural strengthening of RC beams with prestressed NSM CFRP rods?Experimental and analytical investigation. Construction and Building Materials, 23, 3292?3300.
Barros, J. A. O., & Fortes, A. S. (2005). Flexural strengthening of concrete beams with CFRP laminates bonded into slits. Cement & Concrete Composites, 27, 471?480.
Barros, J. A. O., Varma, R. K., Sena-Cruz, J. M., & Azevedo, A. F. M. (2008). Near surface mounted CFRP strips for the flexural strengthening of RC columns: Experimental and numerical research. Engineering Structures, 30, 3412?3425.
ACI Committee 318. (2014). Building code requirements for structural concrete (ACI 318M-14).
Badawi, M., & Soudki, K. (2009). Flexural strengthening of RC beams with prestressed NSM CFRP rods?Experimental and analytical investigation. Construction and Building Materials, 23, 3292?3300.
Barros, J. A. O., & Fortes, A. S. (2005). Flexural strengthening of concrete beams with CFRP laminates bonded into slits. Cement & Concrete Composites, 27, 471?480.
Barros, J. A. O., Varma, R. K., Sena-Cruz, J. M., & Azevedo, A. F. M. (2008). Near surface mounted CFRP strips for the flexural strengthening of RC columns: Experimental and numerical research. Engineering Structures, 30, 3412?3425.
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